http://vimeo.com/11731351What started as algebra lessons for his cousins has turned into a world-changing project. Hundreds of thousands of users worldwide have benefited from Sal Khan's friendly, accessible Youtube videos explaining math, science, and other subjects.
Sal has a vision of teaching the entire world, for free. His not-for-profit Khan Academy has the mission of "providing a high quality education to anyone, anywhere." In this outstanding Gel video, Sal describes the elements of the good experience he's trying to create.