Image via WikipediaThe 19th Hebrew University summer school in economics has videos of all of its presenters, amongst whom are 6 Nobel Laureates in economics. The summer school is organised around the economics of Kenneth Arrow, right, and well worth watching. My favourite video so far is Herbert Scarf's presentation on The Core.
Link to the videos, via Gill Kalai
Also, Scarf's master work, and an index to a large part of the recent history of economic thought, is here.
Even cooler, here's a game you can play to learn Sperner's Lemma.