By early 2009, tens of thousands of students were watching tutorials on the Khan Academy every day. The software I wrote for my cousins had be-come so popular it was making my $50-a-month web host crash. The possibilities surrounding the academy were so exciting that I had trouble doing my day job properly. And soon I quit. In retrospect I was unbelievably naive. Despite already having more views on YouTube than MIT OpenCourseWare and Stanford combined, the Khan Academy was still a one-person operation run out of a closet. Then I got an unexpected and providential e-mail from Ann Doerr, wife of famed venture capitalist John Doerr. She suggested we have lunch.
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