Resources
Free tools to study smarter.
A running collection of study guides, cheat sheets, and outside tools worth your time — free for anyone, student or not.
Study Guides
Guides & Cheat Sheets
Add your own PDFs to /resources/ and link them below.
Calculus Formula Reference
One page covering limits, derivatives, and integrals with intuitive notes on when to use each rule.
Statistics Cheat Sheet
Common distributions, test selection flowchart, and formula quick-reference.
How to Read a Textbook Chapter in Half the Time
A short guide to active reading for dense technical material.
Big-O Complexity Cheat Sheet
Time and space complexity for common data structures and algorithms, side by side.
Recommended Tools
Free Tools Worth Bookmarking
External tools I recommend to almost every student, regardless of subject.
Desmos
A free graphing calculator that makes it easy to visualize functions and build intuition for how they behave.
Wolfram Alpha
Great for checking work on calculus, algebra, and stats problems — use it to verify, not replace, your reasoning.
Khan Academy
Free video lessons that pair well with sessions when you need extra repetition on a specific sub-topic.
Anki
Spaced-repetition flashcards — best used for vocabulary and facts, not for concepts that need real understanding.
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