Detailed text transcripts for TV channel - CNN - 20110531:16:45:00
Months ago, he was working at home in a converted closet in the heart of silicon valley. the former hedge fund analyst had recently quit his job to do something that at the time sounded a bit strange. >> right now i'm cash flow negative. >> reporter: he gave up a paycheck with a hefty ambition. to help educate the world online. >> a lot of people thought i was kind of crazy. obviously, you know, when every waking hour you have you would sneak into a room and make math videos and put them on youtube, people kind of questioned, you know, what's up? >> reporter: what originally started as some ma...