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>> that worked out well so i started tutoring her brothers and cousins and all the rest and i had to do the same lecture all over again. i had a friend who said why don't you put your lectures on you tube. i decided to give it a shot. >> welcome to the presentation on basic addition. >> soon, thousands watched his lectures. >> i started getting letters from people and comments on youtube and they are not like hey, i think this kind of might of helped on my math exam. they are like i failed calculus the first time. i start ared watching the videos and now i'm acing the class. >> the youtube num...

Hey, i think this kind of might of helped on my math exam. they are like i failed calculus the first time. i start ared watching the videos and now i'm acing the class. >> the youtube numbers kept rising and he got letters from the middle east and africa. >> what sal khan has done is amazing. >> now, he is funded by bill gates and offers web lecturers on everything from history to economics to computer science. his videos are viewed millions of tim. >> even if god forbid i got about it by a bus when i walked outside it will still reach millions and maybe eventually billions of students. >> jus...

Hey, i think this kind of might of helped on my math exam. they are like i failed calculus the first time. i start ared watching the videos and now i'm acing the class. >> the youtube numbers kept rising and he got letters from the middle east and africa. >> what sal khan has done is amazing. >> now, he is funded by bill gates and offers web lecturers on everything from history to economics to computer science. his videos are viewed millions of times. >> even if god forbid i got about it by a bus when i walked outside it will still reach millions and maybe eventually billions of students. >> j...