We have competition!

The most popular educator on YouTube does not have a Ph.D. He has never taught at a college or university. And he delivers all of his lectures from a bedroom closet.

This upstart is Salman Khan, a 33-year-old who quit his job as a financial analyst to spend more time making homemade lecture videos in his home studio. His unusual teaching materials started as a way to tutor his faraway cousins, but his lectures have grown into an online phenomenon—and a kind of protest against what he sees as a flawed educational system.

"My single biggest goal is to try to deliver things the way I wish they were delivered to me," he told me recently.

-College 2.0: A Self-Appointed Teacher Runs a One-Man 'Academy' on YouTube