Dr. LeAndrea Ware is one of the most energetic school leaders I’ve ever met. Her positivity is infectious. It’s no wonder she was recently named the Tennessee principal of the year:

The world has made incredible strides toward ending the AIDS epidemic over the last twenty years, and I’m optimistic that more progress is on the way. Explore the data: #WorldAIDSDay 

This #WorldAIDSDay , I’m excited about breakthroughs in treating and preventing HIV thanks to organizations like the @GlobalFund .

I was impressed to see the tremendous impact @gestamp ’s apprenticeship program is having on students and their community:

Technology has made it faster and easier than ever before for people everywhere to give. I’m inspired by how many people from all over the world participate in #GivingTuesday .

I really enjoyed sitting down with @reidhoffman  to talk about the role great cofounders and partners have played in my career, like Paul Allen at Microsoft and @melindagates  at the Gates Foundation. You can listen to our conversation here:

I'm a big fan of @SiliconHBO  and was excited when they asked me to appear in the series finale tonight. #AlwaysBlue 

I’ve read a lot of great books this year. Here are some I think you’ll enjoy reading over the holidays.

Diane Tavenner had a simple but very ambitious goal: “We wanted to teach kids not just what they needed to get into college, but what they needed to live a good life.” You can read an excerpt from her wonderful new book on my blog.