Preview: Teacher to the World
August 30, 2012 -- 8:00 AM
The world's most popular teacher doesn't show his face in online tutorials so students focus on the work, says Khan Academy's Sal Khan. Watch "60 Minutes" on Sunday, Sept. 2 at 7 p.m. ET/PT.
Teacher To The World - On his educational website, "Khan Academy," he teaches millions of students across the world each month. Sal Khan's teaching method has become so effective that he may be the future of American education. Dr. Sanjay Gupta reports.
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