(CBS News) Sal Khan is a math, science, and history teacher to millions of students, yet none have ever seen his face. Khan is the voice and brains behind Khan Academy, a free online tutoring site that may have gotten your kid out of an algebra bind with its educational how-to videos. Now Khan Academy is going global. Backed by Google, Gates, and other Internet powerhouses, Sal Khan wants to change education worldwide, and his approach is already being tested in some American schools. Sanjay Gupta reports.
The following script is from "Teacher to the World" which aired on March 11, 2012. Sanjay Gupta is the correspondent. Denise Schrier Cetta, producer. Matthew Danowski, editor.
Take a moment and remember your favorite teacher - now imagine that teacher could reach, not 30 kids in a classroom, but millions of students all over the world. That's exactly what Sal Khan is doing on his website Khan Academy. With its digital lessons and simple exercises, he's determined to transform how we learn at every level. One of his most famous pupils, Bill Gates, says Khan -- this "teacher to the world," is giving us all a glimpse of the future of education.
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35-year-old Sal Khan may look like a bicycle messenger, but with three degrees from MIT and an MBA from Harvard, his errand is intensely intellectual. In his tiny office above a tea shop in Silicon Valley, he settles in to do what he's done thousands of times before.
[Sal Khan: We've talked a lot now about the demand curve and consumer surplus. Now let's think about the supply curve.]
He's recording a 10-minute economics lesson. It's so simple - all you hear is his voice and all you see is his colorful sketches on a digital blackboard.
Watch Internet phenomenon Sal Khan's video lessons
[Khan: In this video we are going to talk about the law of demand.]
When Khan finishes the lecture, he uploads it to his website - where it joins the more than 3,000 other lessons he's done. In just a couple of years he's gone from having a few hundred pupils to more than four million every month.
- from CBS News
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