Current ethos in Silicon Valley is that if you build a website that people keep coming back to and is changing the lives of millions, you can eventually make money.

There are so many people around the world in need of high-quality education and really starving for education.

Current ethos in Silicon Valley is that if you build a website that people keep coming back to and is changing the lives of millions, you can eventually make money.

Our approach to education has remained largely unchanged since the Renaissance: From middle school through college, most teaching is done by an instructor lecturing to a room full of students, only some of them paying attention.

Universities have come to realize that online is not a fad. The question is not whether to engage in this area but how to do it.

The world is noisy and messy. You need to deal with the noise and uncertainty.

Even though there is rampant unemployment in many parts of the world, there are still large numbers of jobs that are going unfilled because employers are having a hard time identifying people with the right set of skills.