Because education is such a broad area, I chose to focus on language learning.

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?

My ultimate research goal is to transform our human existence to just eating, sleeping, drinking, playing - nevermind.

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

People are good at figuring out what's attractive, and computers are good at quickly searching and finding. You put them together, and bang!

I am always able to keep a laser focus on one thing at a time without getting distracted. It helps that I try to break everything I do into small, achievable tasks.

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.

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

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

Every time you buy tickets on Ticketmaster, you help to digitize a book.

I finished reading High Output Management by Andrew Grove, which had such valuable insights for leaders that I've been forcing managers at Duolingo to read the book.

To regret religion is to regret Western civilization.

A faith is a necessity to a man. Woe to him who believes in nothing.

I have always thought that if you can give viewers the sense of being there a story can be very compelling.

Wine is a civilizing agent.

Around the hero everything turns into a tragedy, around the demigod, a satyr-play, and around God--what? perhaps a "world"?

Death is the surest calculation that can be made.

It took me 1057 pages to describe the hundreds of mathematical equations, algorithms and programming techniques that I invented and used.

Unbalance so as to re-balance.

I would say if you are going to party, show up on time to work.

I remain the luckiest guy I know.