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

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.

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 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 worked on a number of projects that were used by millions of people and that also served as inspiration to what we now call "crowd-sourcing."

The current business model for language education is the student pays — in particular, the student pays Rosetta Stone $500. The problem with this business model is that 95 percent of the world’s population doesn’t have $500.