My grade point average went from a 2.2 to a 4.0 over the summer. I wanted to get straight A's. I decided to get straight A's. I didn't want people to think I was dumb. And when you get straight A's once, its easier.

The main thing that's missing in energy is an incentive to create things that are zero-CO2-emitting and that have the right scale and reliability characteristics.

China and the U.S. need each other very badly. Yes, we should argue about some things, but it's not an 'us versus them,' it's an 'us and them' type scenario.

Today, you always know whether you are on the Internet or on your PC's hard drive. Tomorrow, you will not care and may not even know.

If you think of global public goods like polio eradication, the kind of risk-taking new approach, philanthropy really does have a role to play there, because government doesn't do R&D about new things naturally as much as it probably should, and so philanthropy's there.

3D is a way of organizing things, particularly as we're getting much more media information on the computer, a lot more choices, a lot more navigation than we've ever had before.

Students deserve great teachers. And teachers deserve the support they need to become great.