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.

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.

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

[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.

A picture may speak a thousand words, but still...

When they look at a beautiful view, most people see their memories, not the view!

The coward despairs.

You have had your last bad meal. But, you have also heard your last honest compliment, and you have lost your last true friend.

When you first run up First Avenue in New York, if you don't get goose bumps, theres something wrong with you.

The Sarajevans have a very particular world view - a mordant wit coupled with this unbearable sadness and... truckloads of guts, you know.

I don't give up because I don't give up. I don't believe in it.

How to get taken: Spend most of your time making sure you're not.

Improve your business, your life, your relationships, your finances and your health. When you do the whole world improves.

Ray Rice was beat up last year