Internet phenomenon Sal Khan's video lessons

Sal Khan teaches: Euclid as the father of geometry

The laws of nature are but the mathematical thoughts of God." ~Euclid

Internet phenomenon Sal Khan's video lessons

Sal Khan teaches: The debt ceiling

How well did you follow the debt ceiling debate? Here's an example of how Sal Khan's instructional videos can help viewers understand the news.

Internet phenomenon Sal Khan's video lessons

Sal Khan teaches: The electoral college

The Khan Academy's Sal Khan offers a free primer on the complicated system behind a U.S. presidential election.