What 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 - all at khanacademy.org.

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.

More Gel videos: gelconference.com/videos/

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