Duolingo CEO Luis Von Ahn wants you addicted to learning

3382.623 - 3405.622 Luis Von Ahn

and used Duolingo and did not use any other resources, and then take a test at the end, learn about as much, in some cases, it varies in the study, but either the same or more than the classroom. So we're pretty happy with that. The results actually work. The problem with this way of measuring is that it's very slow. I mean, it takes one or two years for us to get a new measurement.