Cool Math Resources
Books, sites, and tools I recommend to curious students.
Websites & Tools
Khan Academy
[Free video lessons and practice across every level of math.]
Desmos
[A beautiful, free online graphing calculator.]
MIT OpenCourseWare
[Many universities offer educational resources of the first order online for free.]
Books
Measurement — Paul Lockhart
[A perfect introduction to mathematics and its history, leading exquisitely towards a rigorous appreciation of the subject.]
How to Prove It — Daniel J. Velleman
[This is the book I learned to write proofs with. You usually can't go wrong with others, such as the Book of Proof by Richard Hammack. If you follow either of these at your own pace you'll be reading and writing proofs in no time.]
The Sand-Reckoner — Gillian Bradshaw
[This historical fiction novel revolves around Archimedes. It is so incredibly entertaining, but it packs a punch, urging you to consider difficult ethical dilemmas as you go along.]