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