IB · IGCSE · A-Level · Lower Secondary

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An interactive library of 1,190 science & maths lessons for IB, IGCSE, A-Level and Lower Secondary. Every concept opens as a simulation you can play with, builds up visually, then ends with real exam questions — learn on your own, or get matched with a tutor.

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ConceptSmaller atom, stronger pull3 / 8

Cl: only 3 shells — strong pull on incoming electron.

Br: 4 shells — moderate attraction.

I: 5 shells — weak pull, least reactive.

19

subjects

482

topics

1,190

lessons

720+

hours of content

The library

19 subjects. One standard of craft.

Every lesson follows the same proven arc — hook, visual explanation, interactive practice, exam-style test. Open any topic in any programme and you'll find the same careful work underneath.

IB

International Baccalaureate

Full IB Diploma Programme — all standard and higher level subjects

All IB subjects

Physics

From quantum mechanics to cosmology — build deep intuition for how the universe works through simulation, derivation, and exam practice.

24 topics73 lessons

Chemistry

From atomic structure to organic mechanisms — build deep understanding of matter and its transformations through models, particle diagrams, and exam practice.

22 topics81 lessons

Mathematics: Analysis and Approaches

Pure-mathematical core of the IB Diploma — calculus, algebra, functions, vectors, statistics, complex numbers, induction, and series. SL and HL share lessons; HL-only topics are clearly marked.

25 topics77 lessons

Mathematics: Applications and Interpretation

Modelling, statistics, and applied mathematics for the IB Diploma — financial maths, regression, probability, distributions, calculus in context, Voronoi diagrams, and (HL) graph theory, vectors, matrices, and differential equations. Both papers GDC-required.

10 topics71 lessons

Biology

Life from molecule to ecosystem — four themes (unity & diversity, form & function, interaction & interdependence, continuity & change) and the experimental craft of biology. SL and HL share lessons; HL-only topics are clearly marked.

40 topics113 lessons

A2

A-Level

Edexcel International A-Level qualifications — Physics (YPH11), Chemistry (YCH11), Biology (YBI11) and Mathematics (YMA01) live, more subjects coming

All A2 subjects

Physics (Edexcel)

Edexcel International Advanced Subsidiary (IAS) and Advanced Level (IAL) Physics — Units 1-6 spanning mechanics, materials, waves, electricity, fields, thermodynamics, radiation, oscillations and cosmology, with practical skills.

13 topics39 lessons

Physics (Cambridge)

Cambridge International AS & A Level Physics (9702) — AS and A2 content across mechanics, waves, electricity, fields, thermodynamics, oscillations, magnetism, quantum and nuclear physics, with the Cambridge practical-skills papers.

26 topics33 lessons

Chemistry (Edexcel)

Edexcel International Advanced Subsidiary (IAS) and Advanced Level (IAL) Chemistry — Units 1-6 spanning structure, bonding, organic chemistry, energetics, group chemistry, kinetics, equilibria, redox, transition metals, and analytical methods, with practical skills.

22 topics71 lessons

Chemistry (Cambridge)

Cambridge International AS & A Level Chemistry (9701) — AS and A2 content across physical, inorganic and organic chemistry plus analytical techniques, with the Cambridge practical-skills papers.

24 topics70 lessons

Biology (Edexcel)

Edexcel International Advanced Subsidiary (IAS) and Advanced Level (IAL) Biology — Units 1-6 spanning biological molecules, transport and health, cells and development, biodiversity, energy flow, microbiology, immunity, respiration, the internal environment, coordination, and gene technology, with practical skills assessed in Units 3 and 6.

10 topics74 lessons

Biology (Cambridge)

Cambridge International AS & A Level Biology (9700) — AS and A2 content from cell structure and biological molecules through transport, gas exchange, disease and immunity, energy, homeostasis, coordination, inheritance, evolution and genetic technology, with the Cambridge practical-skills papers.

20 topics76 lessons

Mathematics (Edexcel)

Edexcel International Advanced Subsidiary (IAS) and Advanced Level (IAL) Mathematics — 11 modules: Pure Mathematics P1–P4, Mechanics M1–M3, Statistics S1–S3 and Decision Mathematics D1. Covers algebra, coordinate geometry, trigonometry, calculus, vectors, mechanics, statistics, probability distributions, hypothesis testing and discrete optimisation algorithms.

67 topics106 lessons

Mathematics (Cambridge)

Cambridge International AS & A Level Mathematics (9709) — the six components: Pure Mathematics 1, 2 and 3, Mechanics, and Probability & Statistics 1 and 2.

38 topics90 lessons

IGCSE

Cambridge IGCSE

Cambridge IGCSE Biology (0610), Chemistry (0620), Mathematics (0580) and Physics (0625) — master core sciences and mathematics

All IGCSE subjects

IGCSE Mathematics 0580

Mathematics

Cambridge IGCSE Mathematics (0580) — master number, algebra, geometry, trigonometry and statistics with interactive visual lessons and exam practice.

10 topics21 lessons

IGCSE Biology 0610

Biology

Cambridge IGCSE Biology (0610) — master cells, organisation, biological molecules, enzymes, plant and human nutrition, transport, gas exchange, respiration, excretion, coordination, reproduction, inheritance, variation, ecology and biotechnology with interactive visual lessons.

48 topics50 lessons

IGCSE Chemistry 0620

Chemistry

Cambridge IGCSE Chemistry (0620) — master atomic structure, bonding, reactions, organic chemistry and more with interactive visual lessons and exam practice.

14 topics28 lessons

IGCSE Physics 0625

Physics

Cambridge IGCSE Physics (0625) — master motion, forces, energy, thermal physics, waves, electricity, magnetism, nuclear and space physics with interactive visual lessons and exam practice.

24 topics45 lessons

CLS

Cambridge Lower Secondary

Cambridge Lower Secondary Mathematics Stage 8 and Science 0893 (Stages 7–9)

All CLS subjects

CLS Mathematics 0862

Mathematics

Cambridge Lower Secondary Mathematics Stage 8 — build confidence with numbers, algebra, geometry and data through interactive visual lessons.

9 topics18 lessons

CLS Science 0893

Science

Cambridge Lower Secondary Science Stages 7–9 — build foundations in Biology, Chemistry, Physics and Earth & Space through interactive visual lessons, preparing learners for Cambridge Lower Secondary Checkpoint.

36 topics54 lessons

01

Play the concept

Every lesson opens as a simulation you can poke, then builds the explanation step by step — you see the idea before you read a word about it.

02

Practise the real paper

Each concept ends with exam-style questions and a wrong-vs-right breakdown, built backwards from real mark schemes — so practice always looks like the exam.

03

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