As a society, we can and should invest more money in education.

High-quality education provided by MOOCs can be a significant factor in opening doors to opportunity—even among the college-educated.

If a student takes a Stanford computer class and a Princeton business class, it shows they are motivated and have skills. We know it has helped employees get better jobs.

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.

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

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.

Start marching forward, even when into the new and unknown, and don't be deterred by obstacles.