A top-quartile teacher will increase the performance of their class - based on test scores - by over 10 percent in a single year. ... That means that if the entire U.S., for two years, had top-quartile teachers, the entire difference between us and Asia would go away.

Eradications are special. Zero is a magic number. You either do what it takes to get to zero and you're glad you did it; or you get close, give up and it goes back to where it was before, in which case you wasted all that credibility, activity, money that could have been applied to other things.

We work with whoever is elected. Some will bring a more generous, open view of the world than others.

'I don't know' has become 'I don't know yet'.

If I had a dollar for every time someone made fun of me in high school-oh wait, I do!

Going out in the field, it's always enlightening to see what's working and what's not and to sit down and talk - I was with young girls in south Africa - understanding why our tools for prevention aren't being adopted, and what way may need to invent to help protect them.

Success on the Web require high-level corporate understanding of the Internet's capabilities and support of early test-and-invest projects.