Jason Fried, CEO of tech company 37signals, said he invested in Khan's nonprofit because "the next bubble to burst is higher education. It's too expensive. It's too much one-size-fits-all. This is an alternative way to think about teaching — simple, personal, free and moving at your own pace."<br />
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With a computer science degree from the Massachusetts Institute of Technology and an MBA from Harvard, Khan settled into a lucrative position at Sand Hill Road's Wohl Capital Management, while his wife studied medicine at Stanford.<br />
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Then, his young cousin Nadia started struggling in math. In afternoon long-distance conference calls to Louisiana, Khan taught her "unit conversions" using Yahoo Doodle as a shared notepad. He wrote JavaScripts to generate random algebra problems.<br />
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Soon Nadia's brothers and other far-flung family members wanted help, too. Frustrated by scheduling tutoring sessions around work, soccer schedules and different time zones, he simply posted his talks on YouTube.
Source: here