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