About This Site

Free multilingual study material for Cambridge IGCSE, Cambridge A-Level and AP — no account needed.

What's here

Know Revision notes, diagrams, worked examples and exam tips for the available topics. Learn Interactive lessons that work through a topic step by step, with instant-check exercises. Code Coding courses with runnable examples in Python, Java, C, SQL, HTML/CSS and more. Practice Past-paper practice with automatic marking and feedback. Library A library of past papers, mark schemes and printable handouts. Vocab A vocabulary trainer, plus HSK and CEFR grammar references.

Choose your language

Study an English syllabus with explanations in your language.
Read each translation alongside English. Chinese–English mode also shows Chinese glosses.
Choose a language in the header. Code and official exam papers keep their original language.

Made with AI

Written with the best AI models in the world.
Built from the official syllabus, past papers and mark schemes — not web text.
Diagrams drawn per lesson. Photos freely licensed, every source listed on Image credits.

What it costs

Nothing. No account to read, and no adverts anywhere.
Notes, lessons, practice, coding courses, vocabulary — all free.
AI features have a free allowance. Need more? Ask the admin — button, bottom right.

Found a mistake?

Tell us with the feedback button, bottom right of any page.
Corrections to the material are the most useful thing you can send.