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3Blue1Brown: Essence of Calculus
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Yufei Zhao's Math Olympiad Training Handouts
Run by MIT / Yufei Zhao (self-hosted)
OnlineOnline, Self-paced, flexibleOpenLow effort
About this opportunity
Freely available olympiad training notes by MIT Professor Yufei Zhao covering algebra, combinatorics, geometry, and number theory at IMO/USAMO level. Includes handouts on cyclic quadrilaterals, generating functions, integer polynomials, graph theory, and extremal combinatorics. Widely used by national olympiad teams worldwide.
Who can apply
Students already at AMC 12 / AIME / SMO Senior-Open level; preparing for APMO or IMO
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