This is a good example of how cloud tools make this kind of scaling easy. The trickier part can be the cost-- which this piece notes will increase roughly line

This is a good example of how cloud tools make this kind of scaling easy. The trickier part can be the cost-- which this piece notes will increase roughly linearly with the number of users. If Khan Academy is free, I think this means those who are generous are going to need to keep giving to keep it that way. Let's step up, everyone.