Sal Khan's 'Academy' sparks a global tech revolution in education
It's not much past 9 a.m., and Khan, 36, founder of the online educational non-profit Khan Academy, gets set to record his 3,081st video lecture in a small office with a view of air conditioning ducts."In 1997, you see, there was a devaluation of the Thai currency," Khan says into a beefy microphone as he makes crude sketches on his monitor.
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