You have changed my life ... /Khan's life has changed too.
Salam has attracted financial support from many people.
Volunteers have helped translate his videos.
Khan Academy [...] has quickly become the largest "school" in the world.
He has personally created over three thousand videos.
Many teachers have started to use Khan's lectures to supplement their classroom instruction.
Have you been bored because your class moves too slowly for you?
Amazingly, Khan has never charged any money for his videos.
Have you ever had trouble keeping up with class?
He has added many other subjects to the website.
He has added many other subjects. (emphasis on # of subjects)
It has attracted about ten million students a month.
So far, he has raised almost 20 million dollars.