Duolingo is getting more popular

This was neat:

"Sixty million people are now signed up to use Duolingo–the simple, gamified, adaptive language teaching app for smartphones and web browsers. Twenty million of them are currently active users. According to Duolingo, that means there are more people using the platform to learn languages than there are in the entire U.S. public school system."

The piece is by Jordan Shapiro, and is interesting throughout. It can be read here.