One fact we're particularly proud of is that there are more people learning languages on Duolingo in the US than there are people learning languages in the entire US public school system.

[Captchas] are not only annoying, but they kill 10 seconds of your time.

I co-founded Duolingo with the mission of bringing free language education to the world.

I am an early riser, and always wake up between 5 and 6am.

The question that motivates my research is, if we can put a man on the Moon with 100,000 [people], what can we do with 100 million?

I usually make to-do lists with timelines, and pen and paper does the trick for me.

In 2011, after spending a couple of years working at Google, I decided that I wanted to dedicate myself to helping to transform education. I was particularly inspired by my upbringing in Guatemala, a poor country where high-quality educational opportunities are limited to those who have money.