I watch a lot of TV. That's how I spend most of my time outside of work. If I had more time, I would fill it 100 percent with watching TV.

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

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.

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

Before the Internet, coordinating more than 100,000 people, let alone paying them, was essentially impossible. But now with the Internet, I've just shown you a project where we've gotten 750 million people to help us digitize human knowledge.

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

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