Free & Open Source
Rigorous Study Notes
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Free, comprehensive notes for IB, A-Level, GCSE, AP, DSE, university STEM, and programming. Written with undergraduate precision, designed for serious students.
2,000+
Pages
9
Sites
15+
Subjects
100%
Free
Exam Board Notes
DSE
dse.wyattau.com
Hong Kong Diploma of Secondary Education revision notes with worked examples and practice problems.
IB
ib.wyattau.com
International Baccalaureate Diploma Programme notes aligned to the IB curriculum framework.
A-Level
alevel.wyattau.com
UK A-Level revision notes covering multiple exam boards with detailed derivations.
Qualifications
qualifications.wyattau.com
GCSE, AP, Scottish Highers, Irish Leaving Certificate, and other qualification notes.
University & Programming
Reference & Tools
Infrastructure
infrastructure.wyattau.com
Server administration, databases, networking, and security reference materials.
Languages
languages.wyattau.com
Comparative programming language notes covering syntax, paradigms, and concurrency models.
Tools
tools.wyattau.com
Algorithms, data structures, version control, and machine learning fundamentals.
Why These Notes?
Rigorous & Complete
Every definition is precise, every theorem is proved, every formula derived from first principles. No hand-waving, no shortcuts.
Free & Open Source
AGPLv3 licensed. No fees, no ads, no tracking. Source code available on GitHub for contributions and corrections.
Syllabus-Aligned
Written to official exam specifications. Derivations included. No filler content that won't appear in exams.
Cross-Referenced
Concepts linked across subjects and levels. Search across all sites from any page using Cmd+K.