We believe unbelievable progress can be made, in both inventing new vaccines and making sure they get out to all the children who need them.

Common Core is a big win for education.

Whenever you have war, you often have more deaths because the medical system and the food system breaks down, than you have directly through violence.

I think we knew that this would be just like raising the kids together, this would be a fun thing to do in partnership. And you know, we're so lucky because we get to hire in very smart people. We get to partner with governments like the Canadian Development Organization - CIDA, USAID - tonnes of scientists doing this work. This is fascinating.

Digital technology has several features that can make it much easier for teachers to pay special attention to all their students.

The most impactful dollars that Australia can spend are actually what goes to help the poorest.

The future of Windows is to let the computer see, listen and even learn.