From a new article about on-line educational start-ups:
To drive home the point of just how cheap it is to be Quizlet, one of its executives asks me how much money the United States spends per year to educate a single student in K-12 education. About $15,000, I say. That’s more than what it costs us per month to host the entire site, serving millions, the executive responds. Quizlet has no sales force, a very small marketing department, and more than seven million monthly unique visitors. (There are about fifty million public school students in the United States.) Quizlet, in its busiest months, during the school year, is among the top 500 most visited sites on the entire Internet. Now they’ve expanded beyond flash cards. You can create study groups, convert your content into multiplayer games, and search for cards and games that other people have created. We think we can get to 40 million users, then 100 million, says the executive. The question that drives the company, he says, is this: How can we create amazing learning tools for one billion people? This is the way most of the people in the valley talk.
Matt Yglesias adds useful comment.