Wyatt’s Notes — Open Study Library

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Rigorous, exam-aligned notes for IB, A-Level, GCSE, AP, DSE, university STEM, and programming — with worked examples, common mistakes, and practice problems.

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Exam Boards

01 DSE 161 pages · 53 topics 02 IB 304 pages · 73 topics 03 A-Level 366 pages · 71 topics 04 GCSE 80 pages · 41 topics 05 AP 77 pages · 51 topics 06 Highers 47 pages · 35 topics 07 Leaving Cert 47 pages · 35 topics 08 CBSE 11 pages 09 Gaokao 3 pages 10 HSC 3 pages 11 SAT 11 pages

Computer Science

12 C++ 130 pages · 34 topics 13 Language Hub 190 pages · 78 topics 14 Tools 65 pages · 27 topics 15 Java 29 pages · 13 topics 16 Python 30 pages · 7 topics 17 Rust 21 pages · 7 topics 18 Go 24 pages · 5 topics 19 Kotlin 19 pages · 3 topics 20 TypeScript 14 pages 21 Dart 25 pages · 10 topics 22 Swift 9 pages · 5 topics 23 Ruby 10 pages · 6 topics 24 Haskell 10 pages · 6 topics 25 Elixir 9 pages · 5 topics

Further Studies

26 Mathematics 160 pages · 13 topics 27 Physics 137 pages · 7 topics 28 Chemistry 30 pages · 3 topics 29 CS Theory 115 pages · 9 topics 30 Admissions 9 pages

Infrastructure

31 Networking 22 pages · 10 topics 32 Linux 20 pages · 7 topics 33 Security 18 pages · 9 topics 34 Databases 16 pages · 6 topics 35 TrueNAS 12 pages · 7 topics 36 Tuning 10 pages · 6 topics 37 Licensing 2 pages 38 Machine Learning 2 pages

Why These Notes

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Written like a textbook, priced like nothing.

Every topic is built the same way: formal definitions alongside intuition, worked examples with complete solutions, and a common-mistakes section drawn from real examiner reports.

Notes are aligned to each board’s specification — AQA, Edexcel, OCR, CIE, IB, HKEAA — so what you revise is what gets examined.

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The best free study notes I’ve found online. The worked examples and common mistakes sections saved me hours of exam preparation. I got a 43 in IB Maths thanks to these notes.
Priya K. — IB Student, Hong Kong

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