Cambridge IGCSE IGCSE & A-Level Sheet preview

Image credits

Diagrams in our handouts are drawn by us and need no credit. The images below are reused from the web under licences that permit it — each is listed with its author, licence and source.

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A-Level Biology

01 · Cell structure

  • Animal cell structure
    Mariana Ruiz (LadyofHats) · Public domain · Source
  • Plant cell structure
    Mariana Ruiz (LadyofHats) · Public domain · Source
  • Average prokaryote cell
    Mariana Ruiz (LadyofHats) · Public domain · Source
  • Enterobacteria phage T2 transmission electron micrograph
    SnaxMikn · CC BY-SA 4.0 · Source

02 · Biological molecules

03 · Enzymes

  • Plastic spoon n Laundry detergent n Washing powder in white
    Lebacno · CC BY-SA 3.0 · Source
  • yeast
    David Blaikie · CC BY 2.0 · Source

04 · Cell membranes and transport

  • SEM blood cells
    Bruce Wetzel (photographer). Harry Schaefer (photographer) · Public domain · Source
  • Demonstration of osmosis using a potato osmometer
    Knowledge genome · CC BY-SA 4.0 · Source

05 · The mitotic cell cycle

  • Onion skin mitosis (20x)
    UAF Center for Distance Education · CC BY 2.0 · Source
  • Mitosis in Onion Root various stages (Metaphase)
    Natalierussell77 · CC BY-SA 4.0 · Source

06 · Nucleic acids and protein synthesis

  • Space-filling model of the DNA double helix
    Ude · Public domain · Source
  • DNA Extraction
    Joo Nath · CC BY-SA 4.0 · Source
  • DNA Double Helix by NHGRI
    National Human Genome Research Institute · Public domain · Source

07 · Transport in plants

  • Vascular bundle in a young sunflower stem
    Berkshire Community College Bioscience Image Library · CC0 · Source
  • Growth Rings tree rings 01
    Vijayanrajapuram · CC BY-SA 4.0 · Source

08 · Transport in mammals

09 · Gas exchange

  • Normal lung tissue
    Yale Rosen from USA · CC BY-SA 2.0 · Source
  • Human Lungs (NIH BioArt 231 - 630892)
    Courtesy of NIAID Ryan Kissinger · Public domain · Source

10 · Infectious diseases

  • Acid-fast bacilli of Mycobacterium tuberculosis
    Ajay Kumar Chaurasiya · CC0 1.0 · Source
  • Plasmodium falciparum parasite in blood
    MichaelZahniser · Public domain · Source
  • Antibiotic sensitivity test
    Dr Graham Beards · CC BY-SA 4.0 · Source

11 · Immunity

12 · Energy and respiration

  • 800metresOlympicTrials2020
    jenaragon94 · CC BY 2.0 · Source
  • Mitochondria, mammalian lung - TEM
    Louisa Howard · Public domain · Source
  • Monocot Root Aerenchyma in Acorus (35399382813)
    Berkshire Community College Bioscience Image Library · CC0 · Source

13 · Photosynthesis

14 · Homeostasis

  • (20250417) Blood glucose meter 04
    Roy Zuo · CC BY-SA 4.0 · Source
  • Sweating for stunning scenery 130719-Z-NO327-280
    Spc. Tyler Meister · Public domain · Source

15 · Control and coordination

  • Stained neurones under the microscope
    Tulemo · CC BY-SA 4.0 · Source
  • Computed tomography of human brain - large
    Department of Radiology, Uppsala University Hospital. Uploaded by Mikael Häggström · CC0 · Source
  • Venus Flytrap showing trigger hairs
    Noah Elhardt · CC BY-SA 2.5 · Source
  • Human skeletal muscle tissue 1 - TEM
    Louisa Howard · Public domain · Source

16 · Inheritance

  • Human karyotype
    National Cancer Institute · Public domain · Source
  • Human Egg (2722043681)
    Ed Uthman from Houston, TX, USA · CC BY 2.0 · Source

17 · Selection and evolution

  • Hardy-Weinberg formula card
    eXercise project · CC0 · Source
  • Peppered moth forms
    Martinowksy at Dutch Wikipedia (Original text: Maarten Sanne) · CC BY-SA 3.0 · Source
  • Cepaea nemoralis pair banded shells
    · CC BY-SA 2.0 · Source

18 · Classification, biodiversity and conservation

  • A coral reef on the Great Barrier Reef
    Toby Hudson · CC BY-SA 3.0 · Source
  • Aerial image of Grand Prismatic Spring (view from the south)
    Carsten Steger · CC BY-SA 4.0 · Source
  • Insect drawer Natural History Museum Rose Stainthorp 2010 (35900683461)
    Natural History Museum: Coleoptera Section from South Kensingon, London, UK · CC BY 2.0 · Source

19 · Genetic technology

  • Agarose gel under UV
    YTEDG72.k · CC BY 4.0 · Source
  • Thermal cycler for PCR
    Juan Carlos Fonseca Mata · CC BY-SA 4.0 · Source
  • CSIRO ScienceImage 381 Genetically Modified Cotton vs Normal Cotton
    Plant Industry, CSIRO · CC BY 3.0 · Source

vocab · Vocabulary trainer images

  • File:Heart numlabels.svg
    Wapcaplet · CC BY-SA 3.0 · Source
  • File:ArteryVeinCS.jpg
    FishtailBob · CC BY-SA 4.0 · Source
  • File:PBB Protein ATP synthase image.jpg
    www.pdb.org · Public domain · Source
  • File:Heart numlabels.svg
    Wapcaplet · CC BY-SA 3.0 · Source
  • File:E coli at 10000x, original.jpg
    Photo by Eric Erbe, digital colorization by Christopher Pooley, both of USDA, ARS, EMU · Public domain · Source
  • File:Tramlines in a barley crop - geograph.org.uk - 1306062.jpg
    Evelyn Simak · CC BY-SA 2.0 · Source
  • File:Nephron simple numbers.svg
    Jmarchn · CC BY-SA 3.0 · Source
  • File:Respiratory system complete en.svg
    LadyofHats, Jmarchn · Public domain · Source
  • File:Pathology of the lung (cancer).jpg
    Unknown photographer · Public domain · Source
  • File:Blood vessels-en.svg
    Kelvinsong · CC BY-SA 3.0 · Source
  • File:The structure of the immature HIV-1 capsid in intact virus particles.png
    MarinaVladivostok · CC0 · Source
  • File:Histology of articular cartilage zones.jpg
    Catherine A. Bautista, Hee Jun Park, Courtney M. Mazur, Roy K. Aaron, Bahar Bilgen · CC0 · Source
  • File:Chromosome Terminology.png
    Christinelmiller · CC BY-SA 4.0 · Source
  • File:Chlorophyll a.svg
    David Richfield · Public domain · Source
  • File:Paper chromatography in progress.jpg
    Amitchell125 · CC BY-SA 4.0 · Source
  • File:Collagen (triple helix protein).jpg
    Eric Hahn · CC BY-SA 4.0 · Source
  • File:Phloem Cells.jpg
    Chippolito · CC BY-SA 3.0 · Source
  • File:Cotton boll maturing on Bobby Byrd's cotton plant in Hale County near Plainview, Texas. (24490395753).jpg
    USDA NRCS Texas · Public domain · Source
  • File:DNA double helix horizontal.png
    Jerome Walker · Public domain · Source
  • File:Kidney Glomerulus Cell Types.png
    Artwork by Holly Fischer · CC BY 3.0 · Source
  • File:Glycogen structure.jpg
    Mikael Häggström · CC0 · Source
  • File:Psuedostratified epithelium animated.gif
    Laird Sheldahl · CC BY-SA 4.0 · Source
  • File:Endomembrane system diagram en.svg
    Mariana Ruiz LadyofHats · Public domain · Source
  • File:Xenopus laevis nucleosome, Histone H3.3C (2) 1AOI.png
    Luger K, Mäder AW, Richmond RK, Sargent DF, Richmond TJ · CC0 · Source
  • File:SEM Lymphocyte.jpg
    Unknown photographer/artist (False color modifications made by myself--DO11.10) · Public domain · Source
  • File:Animal cell structure en.svg
    LadyofHats (Mariana Ruiz) · Public domain · Source
  • File:Giemsa Stain Macrophage Illustration.png
    Noah Smith · CC BY-SA 4.0 · Source
  • File:Microtubule structure esp.png
    Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Microtubule_structure.png · CC BY-SA 4.0 · Source
  • File:Villi & microvilli of small intestine.svg
    BallenaBlanca · CC BY-SA 4.0 · Source
  • File:Animal mitochondrion diagram et.svg
    LadyofHats, translated by ArtjomJemeljanovNERG · Public domain · Source
  • File:Monocytes, a type of white blood cell (Giemsa stained).jpg
    Dr Graham Beards · CC BY-SA 3.0 · Source
  • File:Anopheles stephensi.jpeg
    Jim Gathany · Public domain · Source
  • File:Complete neuron cell diagram en.svg
    LadyofHats · Public domain · Source
  • File:Neuro Muscular Junction.png
    Doctor Jana · CC BY 4.0 · Source
  • File:Neutrophil with anthrax copy.jpg
    Volker Brinkmann · CC BY 2.5 · Source
  • File:Nucleus Nucleolus and chromatin of animal cell.png
    Dan · CC BY-SA 3.0 · Source
  • File:Plasmodesmata en.svg
    User:Zlir'a · CC0 · Source
  • File:Types of amoeboid movement.tif
    Peter J M Van Haastert · CC BY 4.0 · Source
  • File:Ribosome structure including subunits and binding sites.png
    LadyofHats · CC0 · Source
  • File:Monocot Root Epidermal Root Hair in Lilium (36045152715).jpg
    Berkshire Community College Bioscience Image Library · CC0 · Source
  • File:Rough endoplasmic reticulum.JPG
    Rlawson at English Wikibooks · CC BY-SA 3.0 · Source
  • File:Atlantic salmon fish.jpg
    Timothy Knepp, U.S. Fish and Wildlife Service · Public domain · Source
  • File:Cardiac sarcomere tomogram.jpg
    Davide Tamborrini, Zhexin Wang, Thorsten Wagner, Sebastian Tacke, Markus Stabrin, Michael Grange, Ay Lin Kho, Martin Rees, Pauline Bennett, Mathias Gautel, Stefan Raunser · CC BY 4.0 · Source
  • File:Neuron figure fr.png
    Dominique222 · CC BY-SA 4.0 · Source
  • File:Phloem.jpg
    Clematis · CC BY-SA 3.0 · Source
  • File:Reizleitungssystem 1.png
    J. Heuser · CC BY 2.5 · Source
  • File:Chromosome Terminology.png
    Christinelmiller · CC BY-SA 4.0 · Source
  • File:0313 Endoplasmic Reticulum c labeled.png
    OpenStax · CC BY 3.0 · Source
  • File:Smooth muscle - histology.jpg
    Juan Carlos Fonseca Mata · CC BY-SA 4.0 · Source
  • File:Soybean.USDA.jpg
    · Public domain · Source
  • File:Prometaphase Mitosis Spindle apparatus Meiosis.jpg
    Textured-Sears · CC0 · Source
  • File:Stratified squamous epithelium.png
    Jmarchn · CC BY-SA 3.0 · Source
  • File:Microscope images of starch 3.png
    Daniel Domene-López, Juan Carlos García-Quesada, Ignacio Martin-Gullon and Mercedes G. Montalbán · CC BY 4.0 · Source
  • File:Urtica dioica leaf cross section micrograph.zip.jpg
    Mdantonio2005 · CC BY-SA 4.0 · Source
  • File:Skeletal striated muscle.jpg
    Nephron · CC BY-SA 3.0 · Source
  • File:Taste bud esp.jpg
    NEUROtiker · CC BY-SA 3.0 · Source
  • File:Telomere caps.gif
    U.S. Department of Energy Human Genome Program · Public domain · Source
  • File:Chloroplast II.svg
    Kelvinsong · CC BY 3.0 · Source
  • File:Plant cell structure-en.svg
    LadyofHats · Public domain · Source
  • File:Mitral valve prolapse subtypes.svg
    Y. Coinblatt · CC BY-SA 4.0 · Source
  • File:2102 Comparison of Artery and Vein.jpg
    OpenStax College · CC BY 3.0 · Source
  • File:Inferior vena cava ultrasound.gif
    Tinss · CC BY-SA 4.0 · Source
  • File:Heart numlabels.svg
    Wapcaplet · CC BY-SA 3.0 · Source
  • File:Venus Flytrap showing trigger hairs.jpg
    Noah Elhardt · CC BY-SA 2.5 · Source
  • File:Yeast cells in wet mount of culture.jpg
    Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source
A-Level Business

01 · Business and its environment

  • Bonn, Post-Tower -- 2017 -- 2128 (bw)
    Dietmar Rabich · CC BY-SA 4.0 · Source
  • Retail outlets, High Street - geograph.org.uk - 7644448
    John Baker · CC BY-SA 2.0 · Source
  • Austin Texas food truck
    Kurtkaiser · CC0 · Source

02 · Human resource management

  • Meeting British business representatives (5430620349)
    Foreign and Commonwealth Office · OGL v1.0 · Source

03 · Marketing

  • Shibuya Crossing
    Landry Miguel · CC BY-SA 4.0 · Source
  • Branded retail display
    tophomedesign · CC BY-SA 2.0 · Source

04 · Operations management

  • Assembly line
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source
  • Daiwa Logistics Tosu Logistics Center
    Peka · CC BY-SA 4.0 · Source
  • 001 Car factory assembly line - Opel factory in Gliwice, Poland
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source
  • FANUC 6-axis welding robots
    Phasmatisnox · CC BY 3.0 · Source

05 · Finance and accounting

06 · Business and its environment (A Level)

  • McDonalds Golden Arches
    Anthony92931 · CC BY-SA 3.0 · Source
  • Shipping containers at West Harbour in Jätkäsaari, Helsinki, Finland, 2008 October
    Kari Hakli · CC BY-SA 4.0 · Source

07 · Human resource management (A Level)

08 · Marketing (A Level)

  • Times Square (23307389095)
    Alex Liivet from Chester, United Kingdom · CC0 · Source
  • New World Supermarket During COVID-19 Pandemic
    ProtoKiwi · CC BY-SA 4.0 · Source

09 · Operations management (A Level)

  • Factory Automation Robotics Palettizing Bread
    KUKA Roboter GmbH, Bachmann · Public domain · Source

10 · Finance and accounting (A Level)

  • Financial statements analysis
    kenteegardin · CC BY-SA 2.0 · Source
  • Trading floor of the New York Stock Exchange, New York City LCCN2011632435
    Carol M. Highsmith · Public domain · Source
A-Level Chemistry

01 · Atomic structure

  • Scanning tunneling microscope (STM) 250 nm by 250 nm image of one-atom-thick silver islands grown on palladium (111) surface
    Ponor · CC BY-SA 4.0 · Source
  • Emission spectrum-H
    Merikanto, Adrignola · CC0 · Source

02 · Atoms, molecules and stoichiometry

03 · Chemical bonding

04 · States of matter

  • Steam-boiling green asparagus
    W.carter · CC0 · Source
  • Quartz Crystal Cluster (2932215981)
    Stephanie Clifford from Arlington, VA, USA · CC BY 2.0 · Source
  • Copper (29 Cu)
    Hi-Res Images of Chemical Elements · CC BY 3.0 · Source
  • Octahedral diamond (Mir Kimberlite; Mirnyy, Siberia, Russia) 1 (25177430258)
    James St. John · CC BY 2.0 · Source

05 · Chemical energetics

  • Daiso instant cold pack 300g
    photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source
  • GERMAN BUNSEN (6132104166)
    Jason Woodhead · CC BY 2.0 · Source

06 · Electrochemistry

07 · Equilibria

08 · Reaction kinetics

  • Catalytic converter (4293629922)
    Oak Ridge National Laboratory · CC BY 2.0 · Source

09 · The Periodic Table: chemical periodicity

  • Simple Periodic Table of Elements
    SCB2024 · CC0 · Source

10 · Group 2

11 · Group 17

12 · Nitrogen and sulfur

  • AerialViewPhotochemicalSmogMexicoCity 2
    Creator:Fidel Gonzalez · CC BY-SA 3.0 · Source
  • Mossmorran chemical plant - geograph.org.uk - 5288385
    M J Richardson · CC BY-SA 2.0 · Source

13 · An introduction to AS Level organic chemistry

14 · Hydrocarbons

15 · Halogen compounds

  • Lata de spray congelante
    Nave do Conhecimento · CC0 · Source
  • reflux
    Max1musmax · CC BY-SA 2.0 · Source

16 · Hydroxy compounds

  • Fraktionierte Destillation - Laboratory Fractional distillation apparatus
    Chemie-Verbände Baden-Württemberg · CC BY 2.0 · Source
  • Hand sanitizer in Bangkok in March 2020 - 1
    Mx. Granger · CC0 · Source

17 · Carbonyl compounds

18 · Carboxylic acids and derivatives

  • Synthetic vinegar bottles
    Sgroey · CC BY-SA 4.0 · Source
  • Glass perfume bottle MET DP108895
    This file was donated to Wikimedia Commons as part of a project by the Metropolitan Museum of Art. See the Image and Data Resources Open Access Policy · CC0 · Source

19 · Nitrogen compounds

  • Jana nylon stockings in packaging
    Bevaringstenestene / Museumssenteret i Hordaland · CC BY-SA 4.0 · Source

20 · Polymerisation

  • Polyethylene balls5
    Lluis tgn · CC BY-SA 3.0 · Source
  • 004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source

21 · Organic synthesis

  • Anterone (cyproterone acetate) tablets in Australia, with three blister packs
    BlankEclair · CC BY-SA 4.0 · Source

22 · Analytical techniques

  • BrukerDaltonics maXis1
    Mike25 Michael Willett · Public domain · Source
  • FTIR spectrometer
    Wang, F., Zhang, L., Zhang, X., Li, H. and Wu, S · CC BY 4.0 · Source

23 · Chemical energetics

  • Daiso instant cold pack 300g
    photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source
  • HALIT X NaCl Natriumchlorid WÜRFEL KUBUS 50P
    Hans-Joachim Engelhardt · CC BY-SA 4.0 · Source

24 · Electrochemistry

  • Hofmann'scher Wasserzersetzungsapparat - Deutsches Museum Verkehrszentrum
    Mattes · CC BY-SA 3.0 · Source
  • Barrel Plating For Small Parts
    Encik Tekateki · CC BY-SA 4.0 · Source

25 · Equilibria

26 · Reaction kinetics

27 · Group 2

28 · Chemistry of transition elements

  • Coloured-transition-metal-solutions
    No machine-readable author provided. Benjah-bmm27 assumed (based on copyright claims) · Public domain · Source
  • Ruby crystal 1
    W.carter · CC BY 4.0 · Source

30 · Hydrocarbons

  • White coloured mothball (naphthalene ball) 20230315 180901
    Wiki Farazi · CC0 · Source

31 · Halogen compounds

  • SPRAYING PESTICIDES - NARA - 544246 (cropped)
    John Messina · Public domain · Source

32 · Hydroxy compounds

33 · Carboxylic acids and derivatives

34 · Nitrogen compounds

  • Methyl-orange-sample
    Ben Mills · Public domain · Source
  • Paracetamol Tablets BP 500mg
    themostinept · CC BY-SA 2.0 · Source

35 · Polymerisation

37 · Analytical techniques

  • Bruker 300 MHz NMR Spectrometer
    Lihan Yao · CC BY 2.0 · Source
  • Thin layer Chromatographic Plate Under 365nm UV light
    Ikramul Hasan Imran · CC BY 4.0 · Source
A-Level Computer Science

01 · Information representation

  • Single-digit seven-segment LED display
    The Pi Hut · Product image · Source
  • Chinese Suanpan Abacus
    Felix Winkelnkemper · CC BY-SA 4.0 · Source

02 · Communication

  • TP-Link TL-SG105 5-port gigabit switch
    TP-Link · Product image · Source
  • Cat6 Ethernet cable with RJ-45 plugs
    Cable Matters · Product image · Source

03 · Hardware

  • Opened hard disk drive
    Zzubnik · Public domain · Source
  • Inside an SSD
    Michael Bemmerl · CC BY 3.0 de · Source
  • Computer monitor
    Dell · Product image · Source
  • Wireless mouse
    Logitech · Product image · Source
  • Computer keyboard
    Logitech · Product image · Source
  • DDR5 RAM module
    Corsair · Product image · Source
  • Epson Perfection flatbed scanner
    Epson · Product image · Source
  • Laser printer
    Brother · Product image · Source
  • FDM 3D printer
    Creality · Product image · Source
  • USB microphone
    Logitech · Product image · Source
  • Stepper motor
    Adafruit · Product image · Source
  • External optical disc drive
    ASUS · Product image · Source
  • Meta Quest 3 VR headset
    Meta · Product image · Source
  • Thermistor
    SparkFun · Product image · Source
  • touchscreen
    Rawpixel Ltd · CC0 · Source

04 · Processor Fundamentals

05 · System Software

  • VirtualBox Windows 11 24H2 (Version 10.0.26100.1742.240906-0331) 04 02 2025 17 34 35
    OS: Microsoft Corporation Screenshot: PantheraLeo1359531 😺 (talk) · Public domain · Source
  • OnePlus Nord smartphone displaying Android home screen
    Gannu03 · CC BY-SA 4.0 · Source

06 · Security, privacy and data integrity

  • DigitalPersona U.are.U 4500 fingerprint reader
    HID DigitalPersona · Product image · Source
  • RSA SecurID 700 hardware token
    RSA Security · Product image · Source

07 · Ethics and Ownership

08 · Databases

09 · Algorithm Design and Problem-solving

10 · Data Types and Structures

  • Stack of multicolored books on a table
    Alexander Grey · CC0 · Source
  • Vatican Museum Queue - April 2007
    Diliff · CC BY-SA 3.0 · Source

11 · Programming

  • Java code demonstrating source-code abilities
    Ilyaaaaa · CC BY-SA 4.0 · Source
  • Programmer at work (Unsplash)
    Crew crew · CC0 · Source

12 · Software Development

  • LampFlowchart
    svg by Booyabazookaoriginal png by Wapcaplet · CC BY-SA 3.0 · Source
  • team-meeting
    Startup Stock Photos · CC0 · Source

14 · Communication and internet technologies

  • TP-Link Archer AX55 Wi-Fi 6 router
    TP-Link · Product image · Source
  • Nighthawk CM2000 cable modem
    NETGEAR · Product image · Source
  • GS308 8-port Gigabit Ethernet switch
    NETGEAR · Product image · Source
  • Fiber Optical Cable
    Bquast · CC0 · Source
  • ASTRA2Connect Dish
    Satbuff at English Wikipedia · Public domain · Source

15 · Hardware and Virtual Machines

  • CPU cooler
    osman gucel · CC BY 2.0 · Source
  • Server racks
    Carl Lender from Sunrise, USA · CC BY 2.0 · Source
  • GeForce RTX 4070 graphics card
    NVIDIA · Product image · Source
  • ASUS TUF Gaming B650E-PLUS motherboard
    ASUS · Product image · Source

16 · System Software

  • 168 pin and 184 pin DIMM
    Veeblefetzer · CC BY 4.0 · Source
  • Intel CPU Core 2 Duo E8400 Wolfdale perspective
    Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source

17 · Security

  • YubiKey 5 NFC hardware security key
    Yubico · Product image · Source
  • Enigma M4 Cipher Machine - Caen Memorial museum 2025-03-24
    Andy Li · CC0 · Source

18 · Artificial Intelligence (AI)

19 · Computational thinking and Problem-solving

  • Telefonbog ubt-1
    © 2010 by Tomasz Sienicki [user: tsca, mail: tomasz.sienicki at gmail.com] · CC BY 3.0 · Source
A-Level Economics

01 · Basic economic ideas and resource allocation

  • 001 Car factory assembly line - Opel factory in Gliwice, Poland
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source
  • University students in a technology learning classroom
    Ellamaria elshmod · CC BY-SA 4.0 · Source
  • Bingham Canyon Open Pit Copper Mine 2012-09-17 21-25-59
    Jet6581 · CC BY-SA 3.0 · Source

02 · The price system and the microeconomy

  • Outdoor market fruit and vegetable stall Market Place Romford London 01
    Acabashi · CC BY-SA 4.0 · Source
  • Ingo petrol station Fårösund July 01
    Arild Vågen · CC BY-SA 4.0 · Source

03 · Government microeconomic intervention

04 · The macroeconomy

  • Central Business District skyline, Singapore, at night
    Andrew McMillan · Public domain · Source
  • Aisle in Daily Market Groceries Canberra City October 2025
    Nick-D · CC BY-SA 4.0 · Source

05 · Government macroeconomic intervention

06 · International economic issues

  • Currency Exchange - Moldova (by David Stanley)
    D-Stanley · CC BY 2.0 · Source
  • Red Hook Container Terminal New York September 2016 001
    King of Hearts · CC BY-SA 4.0 · Source
  • Red Hook Container Terminal New York September 2016 001
    King of Hearts · CC BY-SA 4.0 · Source

07 · The price system and the microeconomy (A Level)

  • Large interior view of Plaza Singapura Shopping mall Orchard Road Singapore
    Basile Morin · CC BY-SA 4.0 · Source
  • ArcelorMittal steel plant on the Cuyahoga River
    Roy Luck · CC BY 2.0 · Source
  • Port Qasim Coal Power Plant, 08.06.2021
    VileGecko · CC BY-SA 4.0 · Source

08 · Government microeconomic intervention (A Level)

  • Rio de Janeiro Favela, Rio de Janeiro State, Brazil 01
    Wilfredor · CC0 · Source
  • Garment factory in Bangladesh Women working
    Tareq Salahuddin from Dhaka, Bangladesh · CC BY 2.0 · Source
  • Bonus Cigarettes
    Antonio Kless · CC BY-SA 4.0 · Source

09 · The macroeconomy (A Level)

  • Reigate, Lloyds Bank High Street - geograph.org.uk - 4306372
    Michael Garlick · CC BY-SA 2.0 · Source
  • Skyscraper Construction in Frankfurt, Germany
    Spinarak · CC0 · Source
  • Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)
    James St. John · CC BY 2.0 · Source

10 · Government macroeconomic intervention (A Level)

  • Seat of the European Central Bank and Frankfurt Skyline at dawn 20150422 1
    DXR · CC BY-SA 4.0 · Source
  • Trading Floor at the New York Stock Exchange
    Scott Beale · CC BY-SA 4.0 · Source

11 · International economic issues (A Level)

  • Aerial image of the Bremerhaven container terminal (view from the southeast)
    Carsten Steger · CC BY-SA 4.0 · Source
  • Aerial view of a busy tomato market in Lagos Nigeria
    Ayorinde Ogundele · CC BY-SA 4.0 · Source
A-Level Further Mathematics

01 · Further Pure Mathematics 1

02 · Further Pure Mathematics 2

  • Romanesco broccoli fractals
    Jon Sullivan · Public domain · Source
  • Metall-Zierkette in Nahaufnahme
    Rhetos · CC0 · Source

03 · Further Mechanics

  • Newton's Cradle (15221366308)
    Sheila Sund from Salem, United States · CC BY 2.0 · Source
  • James Parker hammer throw
    Tech. Sgt. Mike Hammond · Public domain · Source
  • Fuente en Baku, Azerbaiyán, 2016-09-26, DD 227-229 HDR
    Diego Delso · CC BY-SA 4.0 · Source

04 · Further Probability & Statistics

A-Level Mathematics

01 · Pure Mathematics 1

02 · Pure Mathematics 2

  • Seismograph recording
    Atomicdragon136 · CC BY 4.0 · Source
  • SLNSW 8633 Dense crowd at SCG for test cricket
    Sam Hood · Public domain · Source

03 · Pure Mathematics 3

  • Sailboat with spinnaker 17RM0454
    Ermell · CC BY-SA 4.0 · Source
  • Romanesco broccoli fractals
    Jon Sullivan · Public domain · Source

04 · Mechanics

05 · Probability & Statistics 1

06 · Probability & Statistics 2

  • poisson-queue
    @gadl · CC BY-SA 2.0 · Source
  • Audience-2595
    Loadmaster (David R. Tribble) This image was made by Loadmaster (David R. Tribble). Email the author: David R. Tribble Also see my personal gallery at Google Photos · CC BY-SA 3.0 · Source
A-Level Physics

01 · Physical quantities and units

02 · Kinematics

03 · Dynamics

  • Space Shuttle Columbia launching
    NASA · Public domain · Source
  • Crash test car from the West Germany USA zone before 120278145 (cropped)
    Kalispera Dell · CC BY 3.0 · Source
  • Group of Skydivers in Freefall Formation at Sunset
    Rstpch · CC BY-SA 4.0 · Source

04 · Forces, density and pressure

  • Fischer precision aneroid barometer
    Fischer · Product image · Source
  • Glacial iceberg in Argentina
    IlyaHaykinson · CC BY 2.0 · Source

05 · Work, energy and power

  • Wind turbines along North Middle Road, Essex County, Ontario, 2025-06-29
    Crisco 1492 · CC BY-SA 4.0 · Source

06 · Deformation of solids

  • Shimadzu AGS-X universal testing machine
    Shimadzu · Product image · Source
  • SpringHandExerciser
    Simon Speed · Public domain · Source

07 · Waves

  • Rigol DS1054Z digital oscilloscope
    Rigol · Product image · Source
  • Plastic Protractor Polarized 05375
    Nevit Dilmen · CC BY-SA 3.0 · Source
  • Breaking waves, Sète cf03
    Christian Ferrer · CC BY 4.0 · Source

08 · Superposition

  • Two-point-interference-ripple-tank
    The original uploader was RenamedUser2 at English Wikipedia · BSD · Source
  • Soap Bubble - foliage background - iridescent colours - Traquair 040801
    · CC BY-SA 3.0 · Source

09 · Electricity

  • Electronic-Axial-Lead-Resistors-Array
    Evan-Amos · Public domain · Source
  • Power lines in Stueng Hav District
    Dmitry Makeev · CC BY-SA 4.0 · Source

10 · D.C. circuits

11 · Particle physics

  • Artificial nuclide americium-241 emitting alpha particles inserted into a cloud chamber for visualisation
    Nuledo · CC BY-SA 4.0 · Source
  • Bubble chamber event. Decay of neutral lambda, anti-lambda hyperons. Photograph circa July 1959. Bubble Chamber-772A - DPLA - 5141859e360581251906c073668c70de
    Department of Energy. Lawrence Berkeley National Laboratory. Public Affairs Department. Strategic Resources Office. Photography Services. 2012 · Public domain · Source

12 · Motion in a circle

13 · Gravitational fields

  • Saturn during Equinox
    NASA / JPL / Space Science Institute · Public domain · Source
  • STS-135 final flyaround of ISS 1
    NASA · Public domain · Source

14 · Temperature

15 · Ideal gases

16 · Thermodynamics

17 · Oscillations

  • Tacoma Narrows still
    Barney Elliot · Public Domain · Source
  • Shortt Synchronome free pendulum clock
    Unknown authorUnknown author · Public domain · Source
  • Close up of an acoustic guitar being played
    Nataev · CC BY-SA 4.0 · Source

18 · Electric fields

  • Van de Graaff generator
    3B Scientific · Product image · Source
  • Lightning strike jan 2007
    Fir0002 · GFDL 1.2 · Source

19 · Capacitance

  • Capacitors Various
    Intiti · Public domain · Source
  • Electrolytic capacitors mounted on a circuit board
    Giovanna 27 · CC BY 4.0 · Source

20 · Magnetic fields

21 · Alternating currents

  • Triangular wave and square wave on oscilloscope screen (cropped)
    User:Xato · CC0 · Source
  • Muurame electrical substation transformer
    Antti Leppänen · CC BY 4.0 · Source

22 · Quantum physics

  • Periodic Table of Photos of Element Spectra
    Umop503 · CC0 · Source
  • Ground mounted solar panels.gk
    Grendelkhan · CC BY-SA 4.0 · Source

23 · Nuclear physics

  • De Molen (windmill) and the nuclear power plant cooling tower in Doel, Belgium (DSCF3859)
    Trougnouf · CC BY 4.0 · Source
  • Particle Tracks in AWAN Expansion Cloud Chamber
    Kebuk awan · CC BY-SA 4.0 · Source

24 · Medical physics

  • Chest Xray PA 3-8-2010
    Stillwaterising · CC0 · Source
  • PET-image
    Jens Maus (http://jens-maus.de/) · Public domain · Source
  • Obstetric ultrasound scan monitor showing 20-week human fetus profile in Navi Mumbai 2015
    Goleisureintl · CC BY 4.0 · Source

25 · Astronomy and cosmology

  • Hubble Ultra Deep Field
    NASA and the European Space Agency. Edited by Noodle snacks · Public domain · Source
  • Andromeda Galaxy (M31)
    Adam Evans · CC BY 2.0 · Source
  • Pillars of Creation (Eagle Nebula)
    NASA, ESA, and the Hubble Heritage Team (STScI/AURA) · Public domain · Source
  • Very Large Telescope (ESO)
    G.Gillet/ESO · CC BY 3.0 · Source

0101 · Physical quantities

0102 · SI units

AP 2-D Art and Design

01 · Elements of Art

  • Wright of Derby, The Orrery
    Joseph Wright of Derby · Public domain · Source
  • Vincent van Gogh - Sunflowers - VGM F458
    Vincent van Gogh · Public domain · Source
  • The Great Wave off Kanagawa
    After Katsushika Hokusai · Public domain · Source
  • Jeansfabric
    Thegreenj · CC BY-SA 3.0 · Source

02 · Principles of Design

  • Da Vinci Vitruve Luc Viatour
    Leonardo da Vinci · Public domain · Source
  • Textile, Strawberry Thief, designed 1883, printed ca. 1934 (CH 18340065)
    Unknown artistUnknown artist · Public domain · Source
  • Vincent van Gogh - Starry Night - Google Art Project
    Vincent van Gogh · Public domain · Source
  • Wright of Derby, The Orrery
    Joseph Wright of Derby · Public domain · Source

03 · 2-D Media, Materials, and Techniques

  • Albrecht Dürer - Melencolia I - Google Art Project (427760)
    Albrecht Dürer · Public domain · Source
  • Alfred Stieglitz - The Steerage - Google Art Project, from Getty
    Alfred Stieglitz · Public domain · Source
  • Claude Monet - Seerosen
    Claude Monet · Public domain · Source

04 · Investigate: Inquiry and the Artistic Process

  • First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169
    John Singer Sargent · CC0 · Source
  • Color wheel with primaries and secondaries
    eXercise project · CC0 · Source
  • The Great Wave off Kanagawa
    After Katsushika Hokusai · Public domain · Source
  • Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project
    Jean-Auguste-Dominique Ingres · Public domain · Source

05 · Make: Practice, Experimentation, and Revision

  • Michelangelo - Study of an Ignudo -Teylers Museum
    Michelangelo · Public domain · Source
  • Vincent van Gogh - Starry Night - Google Art Project
    Vincent van Gogh · Public domain · Source
  • The Great Wave off Kanagawa
    After Katsushika Hokusai · Public domain · Source

06 · Present: Communication and the AP Portfolio

  • Portrait of Alphonse Gérard, Comte de Rayneval (by Jean Auguste Dominique Ingres)
    Jean-Auguste-Dominique Ingres · Public domain · Source
  • Claude Monet - Seerosen
    Claude Monet · Public domain · Source
  • Kathe Kollwitz - Self-portrait NGA 1943.3.5217
    Käthe Kollwitz · Public domain · Source
AP Biology

01 · Chemistry of Life

  • Iceberg with hole near Sandersons Hope 2007-07-28 2
    Kim Hansen · CC BY-SA 3.0 · Source
  • DNA Double Helix by NHGRI
    National Human Genome Research Institute · Public domain · Source
  • 1GZX Haemoglobin
    Zephyris at English Wikipedia · CC BY-SA 3.0 · Source

02 · Cell Structure and Function

  • Onion Epidermis Cells W.M. 40x - 104
    loganrickert · CC BY 2.0 · Source
  • Cloroplasti Elodea
    Cimice50 · CC BY-SA 4.0 · Source
  • SEM blood cells
    Bruce Wetzel (photographer). Harry Schaefer (photographer) · Public domain · Source
  • Plasmolysis of red onion (Allium cepa) cells
    Trương Minh Khải · CC BY 4.0 · Source

03 · Cellular Energetics

  • Mitochondria, mammalian lung - TEM
    Louisa Howard · Public domain · Source
  • Cloroplasti Elodea
    Cimice50 · CC BY-SA 4.0 · Source
  • Plastic spoon n Laundry detergent n Washing powder in white
    Lebacno · CC BY-SA 3.0 · Source

04 · Cell Communication and Cell Cycle

  • Onion skin mitosis 20x magnification - uafcde
    UAF Center for Distance Education · CC BY 2.0 · Source
  • Human fibroblast undergoing cytokinesis
    Reneferretti1 · CC BY 4.0 · Source
  • Mitosis in Onion Root various stages (Metaphase)
    Natalierussell77 · CC BY-SA 4.0 · Source
  • 1225 Chemical Synapse ku
    https://openstax.org · CC BY 4.0 · Source

05 · Heredity

  • Karyotype (normal)
    National Cancer Institute · Public domain · Source
  • Cepaea nemoralis pair banded shells
    · CC BY-SA 2.0 · Source

06 · Gene Expression and Regulation

07 · Natural Selection

  • Antibiotic sensitivity test
    Dr Graham Beards · CC BY-SA 4.0 · Source
  • Biston.betularia.f.carbonaria.7209
    Chiswick Chap · CC BY-SA 3.0 · Source
  • Berlin Archaeopteryx
    Emily Willoughby (emily.a.willoughby@gmail.com) · CC BY-SA 4.0 · Source
  • Stromatolites in Shark Bay
    Happy Little Nomad · CC BY-SA 2.0 · Source
  • Tree of life SVG
    Ivica Letunic: Iletunic. Retraced by Mariana Ruiz Villarreal: LadyofHats · Public domain · Source
  • Active hydrothermal vent- Mushroom (OOI 222)
    Ocean Observatories Initiative · Public domain · Source
  • Berlin Archaeopteryx
    Emily Willoughby (emily.a.willoughby@gmail.com) · CC BY-SA 4.0 · Source

08 · Ecology

  • Coral Outcrop Flynn Reef
    Toby Hudson · CC BY-SA 3.0 · Source
  • Deforested area, Goldisthal, 2023-05-20
    Radomianin · CC BY-SA 4.0 · Source
  • Ocellaris clownfish
    Metatron · CC BY-SA 3.0 · Source
  • A herd of white-tailed deer (Odocoileus virginianus) (5db1cb2b-e72c-4f15-a4d1-662e91c83945)
    NPS Photo · Public domain · Source
  • Sunflower against the blue sky
    Timothy Akolamazima · CC BY-SA 4.0 · Source
AP Calculus AB

01 · Limits and Continuity

02 · Differentiation: Definition and Fundamental Properties

03 · Differentiation: Composite, Implicit, and Inverse Functions

  • Matryoshka dolls - Bor local museum
    Лапоть · CC0 · Source

04 · Contextual Applications of Differentiation

05 · Analytical Applications of Differentiation

06 · Integration and Accumulation of Change

07 · Differential Equations

  • EscherichiaColi NIAID
    NIAID · Public domain · Source
  • Black Coffee and Tea in White Cup is Hot
    epSos.de · CC BY 2.0 · Source

08 · Applications of Integration

AP Calculus BC

01 · Limits and Continuity

02 · Differentiation: Definition and Fundamental Properties

03 · Differentiation: Composite, Implicit, and Inverse Functions

04 · Contextual Applications of Differentiation

05 · Analytical Applications of Differentiation

06 · Integration and Accumulation of Change

07 · Differential Equations

  • EscherichiaColi NIAID
    NIAID · Public domain · Source
  • Black Coffee and Tea in White Cup is Hot
    epSos.de · CC BY 2.0 · Source

08 · Applications of Integration

09 · Parametric Equations, Polar Coordinates, and Vector-Valued Functions

  • International Space Station after undocking of STS-132
    NASA/Crew of STS-132 · Public domain · Source

10 · Infinite Sequences and Series

  • Russian-Matroshka no bg
    Original photo: User:Fanghong Derivative work: User:Gnomz007 · CC BY-SA 3.0 · Source
AP Chemistry

01 · Atomic Structure and Properties

  • Coloured flames of methanol solutions of metal salts and compounds
    Hegelrast · CC BY-SA 4.0 · Source
  • Simple Periodic Table of Elements
    SCB2024 · CC0 · Source

02 · Compound Structure and Properties

03 · Properties of Substances and Mixtures

04 · Chemical Reactions

05 · Kinetics

06 · Thermochemistry

  • Daiso instant cold pack 300g
    photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source
  • Steam-boiling green asparagus
    W.carter · CC0 · Source

07 · Equilibrium

08 · Acids and Bases

09 · Thermodynamics and Electrochemistry

AP Computer Science A

01 · Using Objects and Methods

  • Intel CPU Core 2 Duo E8400 Wolfdale perspective
    Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source
  • Screen-python-code-matplotlib-physics-simulation
    MikeRun · CC BY-SA 4.0 · Source

02 · Selection and Iteration

  • LampFlowchart
    svg by Booyabazookaoriginal png by Wapcaplet · CC BY-SA 3.0 · Source
  • UK Red Traffic Light With Green Filter Arrow - geograph.org.uk - 6409628
    Gary · CC BY-SA 2.0 · Source
  • 001 Car factory assembly line - Opel factory in Gliwice, Poland
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source

03 · Class Creation

  • Jigsaw puzzle in progress
    Balise42 · CC BY-SA 4.0 · Source
  • Blueprint - Hallwylska museet - 101011
    Unknown authorUnknown author · Public domain · Source

04 · Data Collections

AP Computer Science Principles

01 · Creative Development

02 · Data

03 · Algorithms and Programming

  • Telefonbog ubt-1
    © 2010 by Tomasz Sienicki [user: tsca, mail: tomasz.sienicki at gmail.com] · CC BY 3.0 · Source
  • Screen-python-code-matplotlib-physics-simulation
    MikeRun · CC BY-SA 4.0 · Source

04 · Computer Systems and Networks

  • Ethernet RJ45 connector p1160054
    No machine-readable author provided. David.Monniaux assumed (based on copyright claims) · CC BY-SA 3.0 · Source
  • Datacenter Server Racks (22370909788)
    Carl Lender from Sunrise, USA · CC BY 2.0 · Source
  • Netgear-Nighthawk-AC1900-WiFi-Router
    Evan-Amos · Public domain · Source

05 · Impact of Computing

  • CCTV control room monitor wall
    Mark Yeomans · CC BY-SA 4.0 · Source
  • Ewaste-pile
    AvWijk · Public domain · Source
  • Self-driving car
    Dllu · CC BY 4.0 · Source
  • Computer stations at Uganda Development Services Public Library, Kamuli district
    AKibombo · CC BY-SA 4.0 · Source
  • HughesNet Satellite Internet Dish at Rural Cabin (42696447671)
    Tony Webster from Minneapolis, Minnesota, United States · CC BY 2.0 · Source
  • Gender Gap Wikipedia Edit-a-thon (6)
    Liridon · CC BY-SA 4.0 · Source
AP Cybersecurity

01 · Introduction to Security

  • YubiKey 5 NFC hardware security key
    Yubico · Product image · Source
  • RSA SecurID 700 hardware token
    RSA Security · Product image · Source

02 · Securing Spaces

03 · Securing Networks

04 · Securing Devices

  • YubiKey 4 and 4C
    Tony Webster from Minneapolis, Minnesota, United States. Cropped by SUM1 · CC BY 2.0 · Source
  • ClamTk 5.27
    Mauroni, Dave · GPL · Source
  • Biometric Fingerprint Scanner
    Sanskritibharti1398 · CC BY-SA 4.0 · Source

05 · Securing Applications and Data

AP Drawing

01 · Line and Mark-Making

  • Albrecht Dürer - Praying Hands, 1508 - Google Art Project
    Albrecht Dürer · Public domain · Source
  • Michelangelo - Study of an Ignudo -Teylers Museum
    Michelangelo · Public domain · Source
  • Seurat Paul Signac
    Georges Seurat · Public domain · Source

02 · Value, Light, and Form

  • Seurat Paul Signac
    Georges Seurat · Public domain · Source

03 · Space, Depth, and Proportion

04 · Drawing Media and Processes

  • Schets van een stilleven van pannen en een fles, RP-T-1962-20(V)
    Rijksmuseum · CC0 · Source
  • Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project
    Jean-Auguste-Dominique Ingres · Public domain · Source
  • Tobias asleep, Rembrandt van Rijn, c. 1651, pen and brown ink, corrected with white gouache, 16.9 by 19.0 cm, Museum Boijmans Van Beuningen, Rotterdam
    Rembrandt · Public domain · Source
  • Edgar Degas - Ballet (L'Étoile)
    Edgar Degas · Public domain · Source
  • Rembrandt The Three Crosses 1653
    Rembrandt · Public domain · Source

05 · Investigate: Inquiry and the Artistic Process

  • First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169
    John Singer Sargent · CC0 · Source
  • Albrecht Dürer - Melencolia I - Google Art Project (427760)
    Albrecht Dürer · Public domain · Source
  • Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project
    Jean-Auguste-Dominique Ingres · Public domain · Source

06 · Make: Practice, Experimentation, and Revision

  • Michelangelo - Study of an Ignudo -Teylers Museum
    Michelangelo · Public domain · Source
  • Da Vinci Vitruve Luc Viatour
    Leonardo da Vinci · Public domain · Source
  • Cezanne Still Life with Apples a Bottle and a Milk Pot
    Paul Cézanne · Public domain · Source

07 · Present: Communication and the AP Drawing Portfolio

  • Portrait of Alphonse Gérard, Comte de Rayneval (by Jean Auguste Dominique Ingres)
    Jean-Auguste-Dominique Ingres · Public domain · Source
  • Artist studio
    Studiotarekatoui · CC BY-SA 4.0 · Source
  • Albrecht Dürer - Praying Hands, 1508 - Google Art Project
    Albrecht Dürer · Public domain · Source
  • First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169
    John Singer Sargent · CC0 · Source
AP Environmental Science

01 · The Living World: Ecosystems

02 · The Living World: Biodiversity

  • Northwest Crown Fire Experiment
    (Photograph used by permission of the USDA Forest Service.) · CC BY 2.5 · Source
  • Rock covered with multicolored patches of lichen
    Tomascastelazo · CC BY-SA 4.0 · Source
  • Moore Reef underwater ReefScape
    Holobionics · CC BY-SA 4.0 · Source

03 · Populations

  • African Elephant and calf (7513392380)
    shankar s. from Dubai, united arab emirates · CC BY 2.0 · Source
  • European rabbit (Oryctolagus cuniculus) kitten
    Alexis Lours · CC BY 2.0 · Source
  • A herd of white-tailed deer (Odocoileus virginianus) (5db1cb2b-e72c-4f15-a4d1-662e91c83945)
    NPS Photo · Public domain · Source
  • Shibuya Crossing (53333799585)
    Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source

04 · Earth Systems and Resources

  • Soil Profile Containing an Argillic Horizon
    Cjrufe · CC0 · Source
  • 001 Volcano eruption of Litli-Hrútur in Iceland in 2023 Photo by Giles Laurent
    Giles Laurent · CC BY-SA 4.0 · Source
  • Soil Profile Containing an Argillic Horizon
    Cjrufe · CC0 · Source
  • Sossusvlei sand dunes
    Winfried Bruenken (Amrum) · CC BY-SA 2.5 · Source
  • 00 1838 Iguazu Falls from the Brazilian side
    W. Bulach · CC BY-SA 4.0 · Source

05 · Land and Water Use

  • Longsheng Rice Terraces November 2017 014
    King of Hearts · CC BY-SA 4.0 · Source
  • 2019 Bingham Canyon Mine 04
    Farragutful · CC BY-SA 4.0 · Source
  • WITHIN A MILE OF MAGNIFICENT REDWOODS ARE SITES OF SOME OF THE WORST LOGGING AND CLEAR CUTTING - NARA - 542855
    Tomas Sennett · Public domain · Source
  • Aerial view of suburban housing in Blacklick, Ohio, October 2024
    Pi.1415926535 · CC BY-SA 4.0 · Source
  • SPRAYING PESTICIDES - NARA - 544246 (cropped)
    John Messina · Public domain · Source
  • Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)
    James St. John · CC BY 2.0 · Source
  • Farmland near Bradeley Green in Cheshire - geograph.org.uk - 5271496
    Roger Kidd · CC BY-SA 2.0 · Source

06 · Energy Resources and Consumption

07 · Atmospheric Pollution

08 · Aquatic and Terrestrial Pollution

09 · Global Change

  • Largest ever Ozone hole sept2000
    NASA · Public domain · Source
  • Bleached colony of Acropora coral
    Vardhanjp · CC BY-SA 4.0 · Source
  • Hubbard Glacier calving Alaska. (12027161386)
    Bernard Spragg. NZ from Christchurch, New Zealand · CC0 · Source
  • Kudzu on trees in Atlanta, Georgia
    Scott Ehardt · Public domain · Source
  • A coral reef on the Great Barrier Reef
    Toby Hudson · CC BY-SA 3.0 · Source
  • TurowCoalMine
    Petr Vodička · CC BY-SA 4.0 · Source
AP Human Geography

01 · Thinking Geographically

  • Shibuya Crossing (53333799585)
    Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source
  • Aerial view of suburban housing in Blacklick, Ohio, October 2024
    Pi.1415926535 · CC BY-SA 4.0 · Source

02 · Population and Migration Patterns and Processes

  • Shibuya Crossing (53333799585)
    Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source
  • Hungarian Immigrants Cleveland
    Hu Totya · Public domain · Source
  • Hungarian Immigrants Cleveland
    Hu Totya · Public domain · Source

03 · Cultural Patterns and Processes

04 · Political Patterns and Processes

  • Hungarian Parliament Building 1
    kallerna · CC BY-SA 4.0 · Source
  • WITHIN A MILE OF MAGNIFICENT REDWOODS ARE SITES OF SOME OF THE WORST LOGGING AND CLEAR CUTTING - NARA - 542855
    Tomas Sennett · Public domain · Source
  • Hong Kong skyline
    victorgrigas · CC BY-SA 3.0 · Source
  • UN General Assembly hall
    Patrick Gruban, cropped and downsampled by Pine · CC BY-SA 2.0 · Source
  • US-Mexico border fence
    Office of Representative Phil Gingrey · Public domain · Source

05 · Agriculture and Rural Land-Use Patterns and Processes

  • Combine harvester cutting wheat at Arbuthnott, Aberdeenshire - geograph.org.uk - 8117522
    Adrian Diack · CC BY-SA 2.0 · Source
  • Farmer using a hoe in a farm
    Adesolive · CC BY-SA 4.0 · Source
  • Rows in a tea plantation
    Adesolive · CC BY-SA 4.0 · Source
  • Combine harvester cutting wheat at Arbuthnott, Aberdeenshire - geograph.org.uk - 8117522
    Adrian Diack · CC BY-SA 2.0 · Source

06 · Cities and Urban Land-Use Patterns and Processes

  • Manhattan skyline from Upper New York Bay, 20231001 1041 0889
    Jakub Hałun · CC BY 4.0 · Source
  • Rio de Janeiro Favela, Rio de Janeiro State, Brazil 02
    Wilfredor · CC0 · Source
  • Tokyo Shibuya Scramble Crossing 2018-10-09
    Benh LIEU SONG (Flickr) · CC BY-SA 2.0 · Source

07 · Industrial and Economic Development Patterns and Processes

AP Macroeconomics

01 · Basic Economic Concepts

  • Bingham Canyon Open Pit Copper Mine 2012-09-17 21-25-59
    Jet6581 · CC BY-SA 3.0 · Source
  • DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle
    PattayaPatrol · CC BY-SA 4.0 · Source
  • Aerial image of the Bremerhaven container terminal (view from the southeast)
    Carsten Steger · CC BY-SA 4.0 · Source

02 · Economic Indicators and the Business Cycle

03 · National Income and Price Determination

  • Port Qasim Coal Power Plant, 08.06.2021
    VileGecko · CC BY-SA 4.0 · Source
  • Central Business District skyline, Singapore, at night
    Andrew McMillan · Public domain · Source

04 · Financial Sector

  • Euro Series Banknotes (2019)
    PawełMM · CC BY-SA 3.0 · Source
  • Trading floor of the New York Stock Exchange, New York City LCCN2011632435
    Carol M. Highsmith · Public domain · Source
  • Bank of England Building, London, UK - Diliff
    Diliff · CC BY-SA 3.0 · Source

05 · Long-Run Consequences of Stabilization Policies

  • Hungarian Parliament Building 1
    kallerna · CC BY-SA 4.0 · Source
  • Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)
    James St. John · CC BY 2.0 · Source
  • Euro Series Banknotes (2019)
    PawełMM · CC BY-SA 3.0 · Source
  • Trading floor of the New York Stock Exchange, New York City LCCN2011632435
    Carol M. Highsmith · Public domain · Source

06 · Open Economy—International Trade and Finance

  • Currency Exchange - Moldova (by David Stanley)
    D-Stanley · CC BY 2.0 · Source
  • Aerial image of the Bremerhaven container terminal (view from the southeast)
    Carsten Steger · CC BY-SA 4.0 · Source
AP Microeconomics

01 · Basic Economic Concepts

  • Outdoor market fruit and vegetable stall Market Place Romford London 01
    Acabashi · CC BY-SA 4.0 · Source
  • Aerial image of the Bremerhaven container terminal (view from the southeast)
    Carsten Steger · CC BY-SA 4.0 · Source

02 · Supply and Demand

  • Fruit and vegetable stall at Southside Farmers Market November 2025
    Nick-D · CC BY-SA 4.0 · Source
  • DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle
    PattayaPatrol · CC BY-SA 4.0 · Source

03 · Production, Cost, and the Perfect Competition Model

  • Robot arm picks up cylindrical objects in a factory setting
    Shixart1985 · CC BY 2.0 · Source
  • ArcelorMittal steel plant on the Cuyahoga River
    Roy Luck · CC BY 2.0 · Source

04 · Imperfect Competition

  • 001 Car factory assembly line - Opel factory in Gliwice, Poland
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source
  • Port Qasim Coal Power Plant, 08.06.2021
    VileGecko · CC BY-SA 4.0 · Source

05 · Factor Markets

  • Garment factory in Bangladesh Women working
    Tareq Salahuddin from Dhaka, Bangladesh · CC BY 2.0 · Source
  • 001 Car factory assembly line - Opel factory in Gliwice, Poland
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source

06 · Market Failure and the Role of Government

AP Physics 1

01 · Kinematics

02 · Force and Translational Dynamics

  • Space Shuttle Columbia launching
    NASA · Public domain · Source
  • Group of Skydivers in Freefall Formation at Sunset
    Rstpch · CC BY-SA 4.0 · Source

03 · Work, Energy, and Power

04 · Linear Momentum

05 · Torque and Rotational Dynamics

  • SpringHandExerciser
    Simon Speed · Public domain · Source
  • Crash test car from the West Germany USA zone before 120278145 (cropped)
    Kalispera Dell · CC BY 3.0 · Source

06 · Energy and Momentum of Rotating Systems

  • ISS Aug2005
    NASA · Public domain · Source

07 · Oscillations

  • Tuning forks - Various frequencies
    K.Venkataramana · CC0 · Source
  • SpringHandExerciser
    Simon Speed · Public domain · Source

08 · Fluids

  • Barometer, aneroid (AM 2014.62.1-3)
    Sharman D. Neill Ltd · CC BY 4.0 · Source
AP Physics 2

09 · Thermodynamics

10 · Electric Force, Field, and Potential

  • Port and lighthouse overnight storm with lightning in Port-la-Nouvelle
    Maxime Raynal from France · CC BY 2.0 · Source
  • Muller Van de Graaff generator demonstration
    Drbaker171 at English Wikipedia · Public domain · Source

11 · Electric Circuits

  • ESP-01 WiFi Breadboard Project
    RetroEditor · CC BY-SA 4.0 · Source
  • Rigol DS1054Z digital oscilloscope
    Rigol · Product image · Source
  • Power lines in Stueng Hav District
    Dmitry Makeev · CC BY-SA 4.0 · Source

12 · Magnetism and Electromagnetism

  • Bar-magnet-iron-filings max
    MikeRun, Vera Wurmsdobler · CC BY-SA 4.0 · Source
  • Aurora borealis over Eielson Air Force Base, Alaska
    United States Air Force photo by Senior Airman Joshua Strang · Public domain · Source
  • Muurame electrical substation transformer
    Antti Leppänen · CC BY 4.0 · Source
  • Openstax college-physics 22.10 ironfilings-coil-magnet
    OpenStax · CC BY 4.0 · Source

13 · Geometric Optics

14 · Waves, Sound, and Physical Optics

  • Diffraction CD
    Zykov S · CC BY 4.0 · Source
  • Two-point-interference-ripple-tank
    The original uploader was RenamedUser2 at English Wikipedia · BSD · Source

15 · Modern Physics

  • Hydrogen spectrum visible
    McZusatz (talk) · CC0 · Source
  • Particle Tracks in AWAN Expansion Cloud Chamber
    Kebuk awan · CC BY-SA 4.0 · Source
  • De Molen (windmill) and the nuclear power plant cooling tower in Doel, Belgium (DSCF3859)
    Trougnouf · CC BY 4.0 · Source
AP Physics C: Electricity and Magnetism

08 · Electric Charges, Fields, and Gauss's Law

  • OneTeslaTS DRSSTC Tesla Coil closeup
    Original image: OneTesla Derived image: Chetvorno · CC BY-SA 4.0 · Source
  • Muller Van de Graaff generator demonstration
    Drbaker171 at English Wikipedia · Public domain · Source

09 · Electric Potential

10 · Conductors and Capacitors

  • Capacitors Various
    Intiti · Public domain · Source
  • Electrolytic capacitors mounted on a circuit board
    Giovanna 27 · CC BY 4.0 · Source

11 · Electric Circuits

  • ESP-01 WiFi Breadboard Project
    RetroEditor · CC BY-SA 4.0 · Source
  • Rigol DS1054Z digital oscilloscope
    Rigol · Product image · Source

12 · Magnetic Fields and Electromagnetism

  • Openstax college-physics 22.10 ironfilings-coil-magnet
    OpenStax · CC BY 4.0 · Source
  • Aurora borealis over Eielson Air Force Base, Alaska
    United States Air Force photo by Senior Airman Joshua Strang · Public domain · Source

13 · Electromagnetic Induction

AP Physics C: Mechanics

01 · Kinematics

02 · Force and Translational Dynamics

  • Space Shuttle Columbia launching
    NASA · Public domain · Source
  • Group of Skydivers in Freefall Formation at Sunset
    Rstpch · CC BY-SA 4.0 · Source

03 · Work, Energy, and Power

04 · Linear Momentum

05 · Torque and Rotational Dynamics

  • Gear train
    Robbie Sproule from Montreal, Canada · CC BY 2.0 · Source
  • Analytical beam balance - Upper part of high precision mechanical analytical scales
    Sergei Golyshev · CC BY-SA 2.0 · Source

06 · Energy and Momentum of Rotating Systems

  • Kimmy Repond (born 18 October 2006), Swiss figure skater, at Art on Ice 2026 in Zurich. DSC05240
    Skyscraper2010 · CC BY-SA 4.0 · Source

07 · Oscillations

  • Saint Isaac's Cathedral - Foucault pendulum in 1984
    This photo is a scanned Reversal film (Slide) · CC BY-SA 4.0 · Source
AP Precalculus

01 · Polynomial and Rational Functions

02 · Exponential and Logarithmic Functions

  • 800metresOlympicTrials2020
    jenaragon94 · CC BY 2.0 · Source
  • Matryoshka dolls - Bor local museum
    Лапоть · CC0 · Source
  • EscherichiaColi NIAID
    NIAID · Public domain · Source

03 · Trigonometric and Polar Functions

  • Giant Ferris Wheel Vienna from W on 2010-09-20
    Robert F. Tobler · CC BY-SA 4.0 · Source
  • International Space Station after undocking of STS-132
    NASA/Crew of STS-132 · Public domain · Source

04 · Functions Involving Parameters, Vectors, and Matrices

AP Statistics

03 · Collecting Data

04 · Probability, Random Variables, and Probability Distributions

07 · Inference for Quantitative Data: Means

08 · Inference for Categorical Data: Chi-Square

  • OpenOffice.org Calc
    http://hacktolive.org/ · LGPL · Source

09 · Inference for Quantitative Data: Slopes

  • Linear regression
    Sewaqu · Public domain · Source
  • Residual plots for linear regression conditions
    eXercise project · CC0 · Source
IGCSE Biology

01 · Characteristics and classification of living organisms

02 · Organisation of the organism

  • Onion epidermis cells (light micrograph, 40x)
    loganrickert · CC BY 2.0 · Source
  • Compound light microscope
    GcG(jawp) · Public domain · Source

03 · Movement into and out of cells

  • Plasmolysis in red onion cells
    Trương Minh Khải · CC BY 4.0 · Source
  • Human blood
    Olena Hohulia, Куцик Влада, Кремінь Валентина, Ivanchik Marya · CC BY 4.0 · Source

04 · Biological molecules

05 · Enzymes

06 · Plant nutrition

07 · Human nutrition

08 · Transport in plants

09 · Transport in animals

  • Blood cells (scanning electron micrograph)
    Bruce Wetzel and Harry Schaefer (National Cancer Institute) · Public domain · Source

10 · Diseases and immunity

  • White blood cell engulfing bacteria
    National Institutes of Health (NIH) · Public domain · Source
  • Mosquito (Ochlerotatus annulipes) and Midge (Culicoides impunctatus) biting human (me)
    Dunpharlain · CC BY-SA 4.0 · Source

11 · Gas exchange in humans

  • 3d model of lungs airways ribs
    Eboelen (talk) (Uploads) · CC0 · Source
  • Respiratory system complete en librsvg
    LadyofHats, Jmarchn · Public domain · Source

12 · Respiration

  • Finish of sprint running, 1992 Paralympics
    Norman Bailey/Australian Paralympic Committee · CC BY-SA 3.0 · Source
  • Berlin-Marathon 2015 Runners 14
    Denis Barthel · CC BY-SA 4.0 · Source

13 · Excretion in humans

  • Haemodialysis machine
    Виталий Поспелов at ru.wikipedia · CC BY-SA 3.0 · Source
  • Kidney section vertical
    Henry Vandyke Carter · Public domain · Source

14 · Coordination and response

15 · Drugs

16 · Reproduction

17 · Inheritance

  • Human karyotype diagram showing autosomes and sex chromosomes - NHGRI
    National Human Genome Research Institute (NHGRI) · Public domain · Source
  • DNA Double Helix by NHGRI
    National Human Genome Research Institute · Public domain · Source

18 · Variation and selection

  • Peppered moth: dark (melanic) form
    Chiswick Chap · CC BY-SA 3.0 · Source
  • Corner of Stockton and Jackson Street, crowd, San Francisco (April 2007)
    Jennifer Woodard Maderazo · CC BY 2.0 · Source
  • Camel in Gobi Desert 01
    Bernard Gagnon · CC0 · Source

19 · Organisms and their environment

  • Coral reef ecosystem
    Jim E Maragos, U.S. Fish and Wildlife Service · Public domain · Source
  • African savanna elephants at Saadani National Park Tanzania
    Rasheedhrasheed · CC BY-SA 4.0 · Source

20 · Human influences on ecosystems

  • 004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source
  • Deforested area, Goldisthal, 2023-05-20
    Radomianin · CC BY-SA 4.0 · Source
  • Giant panda eating bamboo
    Kevin Dooley · CC BY 2.0 · Source

21 · Biotechnology and genetic modification

IGCSE Business Studies

01 · Understanding business activity

02 · People in business

  • Meeting British business representatives (5430620349)
    Foreign and Commonwealth Office · OGL v1.0 · Source
  • Alpha Factory-Sewing Floor 80-90
    Alan D Cirker · CC BY 3.0 · Source

03 · Marketing

  • A John Lewis Partnership shop window (8734849424)
    Tyne & Wear Archives & Museums · No restrictions · Source
  • Times square at night
    Rafi B. from Somewhere in Texas :) · CC BY 2.0 · Source

04 · Operations management

05 · Financial information and decisions

  • Exterior of a modern Wells Fargo bank branch in Athens, Georgia 01
    Harrison Keely · CC BY 4.0 · Source
  • Andrew Aziz
    Bear Bull Traders · CC BY 2.0 · Source
  • Trading floor of the New York Stock Exchange, New York City LCCN2011632435
    Carol M. Highsmith · Public domain · Source

06 · External influences on business activity

IGCSE Chemistry

01 · States of matter

02 · Atoms, elements and compounds

  • Vanadium crystal bar and 1cm3 cube
    Alchemist-hp (pse-mendelejew.de) · FAL · Source
  • Water-3D-balls-A
    Ben Mills · Public domain · Source

03 · Stoichiometry

  • Acid and Base Titration
    Kengksn · CC BY-SA 4.0 · Source
  • Analytical balance mettler ae-260
    US DEA · Public domain · Source

04 · Electrochemistry

  • Electrolysis of water
    Rhetos · CC0 · Source
  • Hofmann'scher Wasserzersetzungsapparat - Deutsches Museum Verkehrszentrum
    Mattes · CC BY-SA 3.0 · Source

05 · Chemical energetics

  • Campfires burning wood pits
    Jon Sullivan · Public domain · Source
  • Bunsen burner flame types
    Arthur Jan Fijałkowski · CC BY-SA 3.0 · Source
  • Bunsen burner flame types
    Arthur Jan Fijałkowski · CC BY-SA 3.0 · Source

06 · Chemical reactions

07 · Acids, bases and salts

  • Copper sulphate (48723408188)
    Auckland Museum Collections from Auckland, Aotearoa New Zealand · CC BY 2.0 · Source
  • Blue and red litmus paper
    Meganbeckett27 · CC BY-SA 3.0 · Source
  • PH Test Strips
    Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source
  • Limestone Cliffs, Little Ormes Head - geograph.org.uk - 7808316
    N Chadwick · CC BY-SA 2.0 · Source

08 · The Periodic Table

  • Potassium reacting with water
    Tavoromann · CC BY-SA 3.0 · Source
  • Periodic table HMNS
    Ed Uthman, Houston, Texas, USA · CC BY 3.0 · Source
  • Coloured-transition-metal-solutions
    No machine-readable author provided. Benjah-bmm27 assumed (based on copyright claims) · Public domain · Source
  • Edelgase in Entladungsroehren
    Alchemist-hp www.pse-mendelejew.de · CC BY-SA 2.0 de · Source

09 · Metals

  • Rusted iron chain
    MX1996 · CC BY-SA 4.0 · Source
  • Cathay Pacific A350-941 preparing to takeoff on runway 25L@HKG
    BenYung0531 · CC BY-SA 4.0 · Source
  • Rusted top edge grey heavily worn deteriorating grubby grungy aged metal surface texture
    Sisters.seamless · CC0 · Source
  • Copper (29 Cu)
    Hi-Res Images of Chemical Elements · CC BY 3.0 · Source

10 · Chemistry of the environment

11 · Organic chemistry

  • Anacortes Refinery 31911
    Walter Siegmund (talk) · CC BY 2.5 · Source
  • 004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source

12 · Experimental techniques and chemical analysis

IGCSE Computer Science

01 · Data representation

  • Die (the 'heart') of a microprocessor Intel 80486 with 1.2 millions of transistors, ca. 1990
    Thomy pc at German Wikipedia · Public domain · Source
  • Binary-code
    Graph+sas · CC BY-SA 4.0 · Source
  • Hard disk platters and head
    Mfield, Matthew Field, http://www.photography.mattfield.com · CC BY-SA 3.0 · Source

02 · Data transmission

  • USB connectors
    Techtonic · Public domain · Source
  • An Ethernet cable
    No machine-readable author provided. David.Monniaux assumed (based on copyright claims) · CC BY-SA 3.0 · Source
  • Fiber optic illuminated
    Hustvedt · CC BY-SA 3.0 · Source

03 · Hardware

  • Inside a hard disk drive
    Zzubnik · Public domain · Source
  • A solid state drive
    PantheraLeo1359531 · CC BY 4.0 · Source
  • An optical disc
    · Public domain · Source
  • A USB flash drive
    Dmitry Makeev · CC BY-SA 4.0 · Source
  • A magnetic tape cartridge
    Mister rf · CC BY-SA 4.0 · Source
  • Logitech K120 USB keyboard
    Logitech · Product image · Source
  • Logitech M100 optical mouse
    Logitech · Product image · Source
  • Honeywell Voyager 1250g barcode scanner
    Honeywell · Product image · Source
  • Epson Perfection V39 II flatbed scanner
    Epson · Product image · Source
  • Brother HL-L2400D laser printer
    Brother · Product image · Source
  • Bambu Lab X1 Carbon with AMS module (cropped)
    Benlisquare · CC BY-SA 4.0 · Source
  • Canon PIXMA TS3520 inkjet printer
    Canon · Product image · Source
  • Logitech Z313 computer speakers
    Logitech · Product image · Source
  • Samsung 24-inch monitor
    Samsung · Product image · Source
  • Logitech Yeti USB microphone
    Logitech · Product image · Source
  • Logitech H390 headset
    Logitech · Product image · Source
  • Samsung Galaxy Tab A9 tablet
    Samsung · Product image · Source
  • Corsair Vengeance DDR5 RAM module
    Corsair · Product image · Source
  • Intel CPU Core i7 6700K Skylake top
    Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source
  • Electronic-Component-Screw-DC-Motor
    Evan-Amos · Public domain · Source
  • AM2302 (DHT22) digital temperature and humidity sensor module
    Suyash Dwivedi · CC BY-SA 4.0 · Source
  • Navigon Canada 310 - board-40222
    Raimond Spekking · CC BY-SA 4.0 · Source
  • Nikon D850 digital single-lens reflex camera
    G1MFG · CC BY-SA 4.0 · Source
  • Datacenter Server Racks (22370909788)
    Carl Lender from Sunrise, USA · CC BY 2.0 · Source
  • Netgear-Nighthawk-AC1900-WiFi-Router
    Evan-Amos · Public domain · Source

04 · Software

  • Computer motherboard 6
    Kurt Kaiser · CC0 · Source
  • Fedora 33 with its default desktop environment (GNOME 3.38) and background
    GNOME · GPL · Source
  • Screen-python-code-matplotlib-physics-simulation
    MikeRun · CC BY-SA 4.0 · Source

05 · The internet and its uses

06 · Automated and emerging technologies

  • An industrial robot arm
    Нечаева Лилия Александровна · CC BY-SA 4.0 · Source
  • A drone
    Josh Sorenson · CC0 · Source
  • Mi Robot Vacuum
    Popey900 · Copyrighted free use · Source
  • Waymo Jaguar I-Pace - Side View 01
    9yz · CC BY 4.0 · Source

07 · Topic 07

  • programmer
    hackNY · CC BY-SA 2.0 · Source

08 · Programming

09 · Databases

10 · Boolean logic

  • A logic gate chip
    S. Kaba · Public domain · Source
  • ESP-01 WiFi Breadboard Project
    RetroEditor · CC BY-SA 4.0 · Source
IGCSE Economics

01 · The basic economic problem

  • DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle
    PattayaPatrol · CC BY-SA 4.0 · Source
  • Farmland near Bradeley Green in Cheshire - geograph.org.uk - 5271496
    Roger Kidd · CC BY-SA 2.0 · Source

02 · The allocation of resources

03 · Microeconomic decision-makers

  • SPAR kolonial mat varehandel hyller (Supermarket interior GROCERY store aisle shelves) Frokostblandinger gryn müsli Axa frukt energi 4-korn blåbær (cereals muesli) etc Tjøme NORWAY 2023-08-31 IMG 1095
    Wolfmann · CC BY-SA 4.0 · Source
  • 001 Car factory assembly line - Opel factory in Gliwice, Poland
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source
  • 08 Philippine peso PHP currency - banknotes and coins of Philippine money
    Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source

04 · Government and the macroeconomy

  • People's Bank of China (2006-02-18)
    Yongxinge (Wikimedia Commons) · CC BY-SA 3.0 · Source
  • Shanghai skyline waterfront pudong 5166168 69 70
    Ermell · CC0 · Source
  • Vatican Museum Queue - April 2007
    Diliff · CC BY-SA 3.0 · Source

05 · Economic development

06 · International trade and globalisation

  • Container port
    H. Zell · CC BY-SA 3.0 · Source
  • Port bow view of the Russian merchant container ship CHITA underway. The ship has numerous commercial vehicles as deck cargo - DPLA - e120d3e0e4cf053032385cc8b2eca1fe
    Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994 · Public domain · Source
IGCSE English

01 · Reading skills

02 · Writing: purpose, audience and accuracy

  • Person writing in a notebook while sitting at a desk
    Shixart1985 · CC BY 2.0 · Source

03 · Writing an informal email

  • Person writing in notebook while using laptop at a modern workspace
    Shixart1985 · CC BY 2.0 · Source

04 · Writing a formal letter or email

05 · Writing a report

  • Carlisle Indian School, Carlisle, Pa. Classroom debate by debating society LCCN2008675522
    Johnston, Frances Benjamin, 1864-1952, photographer · Public domain · Source
  • Person writing in notebook while using laptop at a modern workspace
    Shixart1985 · CC BY 2.0 · Source

06 · Writing an article

07 · Writing a review

  • Theatre of young audience (16134553769)
    Andrey Shalaev · CC BY 2.0 · Source

08 · Writing an essay

  • Rammohun Library and Free Reading Room - Rare Books Collection (1)
    Sumitsurai · CC BY-SA 4.0 · Source
  • Person writing in a notebook while sitting at a desk
    Shixart1985 · CC BY 2.0 · Source

09 · Listening skills

  • Radio WWOZ New Orleans studio October 2009 01
    Infrogmation of New Orleans · CC BY-SA 4.0 · Source
  • Students of Mary Lauren Brown in conversation about Bullying
    Foundation Digital Schools Liberia · CC0 · Source

10 · Speaking skills

  • Don Young speaking at Juneau-Douglas High School, 1972-1973 school year
    Juneau-Douglas High School (or student class/group of the school), Juneau, Alaska · Public domain · Source
  • Students of Mary Lauren Brown in conversation about Bullying
    Foundation Digital Schools Liberia · CC0 · Source

11 · Vocabulary and text types

IGCSE Mathematics

01 · Number

  • Andromeda Galaxy (with h-alpha)
    Adam Evans · CC BY 2.0 · Source
  • Sale sign in the shopping mall. Discount tag. Bangkok. (48087867208)
    Artem Beliaikin from Moscow, Russia · CC BY 2.0 · Source

02 · Algebra and graphs

  • Romanesco broccoli fractals
    Jon Sullivan · Public domain · Source
  • Kangji Suspension Bridge under clear sky on 16 January 2015
    Jason · CC BY 2.0 · Source

03 · Coordinate geometry

04 · Geometry

  • Symmetry of the Taj Mahal, Agra
    Jonathan Freundlich · CC BY-SA 3.0 · Source
  • Matryoshka from Hungary
    Wilfredor · CC0 · Source
  • Honeycomb - Flickr - Bistrosavage
    Doug Bowman from DeKalb IL, USA · CC BY 2.0 · Source

05 · Mensuration

06 · Trigonometry

  • Tour Eiffel - 20150801 15h30 (10621)
    Another one of my pictures: This photograph was taken by Medium69 (William Crochot) and released under the license stated below. You are free to use it for any purpose as long as you credit the author (William Crochot), the Source (Wikimedia Commons) and the license (CC-BY-SA 4.0) in close relation to the image. Please do not upload an updated image here without consultation with the Author. The author would like to make corrections only at his own source RAW. This ensures that the changes are preserved.Please if you think that any changes should be required, please inform the author.Otherwise you can upload a new image with a new name. Please use one of the templates derivative or extract · CC BY-SA 4.0 · Source
  • London Eye at sunset 2013-07-19
    Bob Collowan · CC BY-SA 3.0 · Source

07 · Transformations and vectors

  • Sailboat with spinnaker 17RM0454
    Ermell · CC BY-SA 4.0 · Source
  • WLA vanda Tiles with repeat pattern
    Wikipedia Loves Art participant "VeronikaB" · CC BY 2.5 · Source

08 · Probability

09 · Statistics

  • Galton box
    Exhibit made by Estes Objethos Atelier, photo by Rodrigo.Argenton · CC BY-SA 4.0 · Source
  • Crowd of People at Ridge, Shimla
    Shimla Deities · CC BY 4.0 · Source
IGCSE Physics

01 · Motion, forces and energy

  • Windmills D1-D4 (Thornton Bank)
    Hans Hillewaert · CC BY-SA 4.0 · Source
  • Cedar Point Rougarou cars on loop track (2859)
    Bobby Proffer · CC BY-SA 3.0 · Source
  • Hoover Dam, Nevada (Arizona-Nevada, USA), Staumauer -- 2012 -- 6102
    Dietmar Rabich · CC BY-SA 4.0 · Source
  • Analytical balance mettler ae-260
    US DEA · Public domain · Source
  • Glacial iceberg in Argentina
    IlyaHaykinson · CC BY 2.0 · Source

02 · Thermal physics

  • Mano en el espectro visible y en el infrarrojo térmico
    Amfeli · CC BY 4.0 · Source
  • Digital thermometer
    Vee Gee · Product image · Source
  • Steam-boiling green asparagus
    W.carter · CC0 · Source

03 · Waves

  • Two-point-interference-ripple-tank
    The original uploader was RenamedUser2 at English Wikipedia · BSD · Source
  • DispersionPrisme
    Kilohn limahn · CC BY-SA 4.0 · Source
  • A bunch of optic fibres made of plastic
    Amangeldyurazov · CC BY-SA 4.0 · Source
  • Convex lens (magnifying glass) and upside-down image
    AntanO · CC BY-SA 4.0 · Source
  • USB microphone
    Logitech · Product image · Source

04 · Electricity and magnetism

  • Magnetic field pattern
    Maciej J. Mrowinski · CC BY-SA 4.0 · Source
  • Pylon ds
    Yummifruitbat · CC BY-SA 2.5 · Source
  • Pole mounted Transformer
    Bidgee · CC BY 3.0 · Source
  • Resistor kit
    SparkFun Electronics · Product image · Source
  • RCD Protection Consumer Dual Split-Load
    Evry Electrical · CC BY 4.0 · Source
  • U.S. Department of Energy - Science - 271 031 001 (23897761873)
    U.S. Department of Energy from United States · Public domain · Source
  • Logarex smart household electricity meter build year 2023
    RobbieIanMorrison · CC BY 4.0 · Source
  • Commutator and brushes DC motor
    Christian Kral · CC BY 4.0 · Source

05 · Nuclear physics

  • Doel nuclear power plant
    Ad Meskens · CC BY-SA 3.0 · Source
  • GQ GMC-300S Geiger counter
    GQ Electronics · Product image · Source
  • Capt. Candice Adams Ismirle waits to receive a radiation treatment Oct. 22, 2013, at Walter Reed National Military Medical Center in Bethesda, Md
    Staff Sgt. Russ Scalf · Public domain · Source

06 · Space physics

  • The Sun
    NASA/SDO (AIA) · Public domain · Source
  • Saturn
    NASA / JPL / Space Science Institute · Public domain · Source
  • Jupiter
    NASA Hubble · CC BY 2.0 · Source
  • Mars
    ESA & MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA, CC BY-SA 3.0 IGO · CC BY-SA 3.0 igo · Source
  • Whirlpool Galaxy
    NASA and European Space Agency · Public domain · Source
  • FullMoon2010
    Gregory H. Revera · CC BY-SA 3.0 · Source
  • Laser Towards Milky Ways Centre
    ESO/Yuri Beletsky (ybialets at eso.org) · CC BY 4.0 · Source
  • Oldest Light in the Universe (SVS30133)
    NASA's Scientific Visualization Studio - Marit Jentoft-Nilsen, Global Science and Technology, Inc./Mark Malanoski · Public domain · Source
  • HL Tau protoplanetary disk
    ALMA (ESO/NAOJ/NRAO) · CC BY 4.0 · Source
  • ISS Aug2005
    NASA · Public domain · Source
English Grammar · A1

08 · Topic 08

  • Full English breakfast at the Chalet Cafe, Cowfold, West Sussex, England
    Acabashi · CC BY-SA 4.0 · Source
English Grammar · A2

02 · Topic 02

  • Senior person reading a book indoors closeup
    Nenad Stojkovic · CC BY 4.0 · Source

09 · Topic 09

  • DFC 2099 A bustling market stall piled high with bright green grapes and other fresh fruit as a vendor hands a bag to a customer - a colorful scene of everyday produce trade
    PattayaPatrol · CC BY-SA 4.0 · Source
Python Reference

16 · Computing concepts

Data sources
  • HSK vocabulary — English / Chinese trainer
    Word lists & pinyin: complete-hsk-vocabulary (MIT). Definitions from CC-CEDICT, CC BY-SA 4.0.
  • Chinese Reading — news reader
    Per-word pinyin & English glosses from CC-CEDICT (CC BY-SA 4.0), segmented with jieba. Headlines & articles are fetched live from their news sources and shown for language learning; all rights remain with the original publishers.
Simulations

The interactive simulations linked from the Learn and Know pages are by PhET Interactive Simulations, University of Colorado Boulder, used under CC BY 4.0.

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