David Christian's TED2011 Talk
David Christian weaves together a story that helps explain how the universe gradually built greater and greater complexity and reveals what makes humans special. Learn more at the Big History Project.
Read previous versions of the Annual Letter
In our Annual Letter, Melinda and I wrote about what the future holds.
I went to Arizona to learn about a new era of online learning.
What I learned from Washington state’s teacher of the year.
Promising apps and websites that could make your teacher’s job easier.
Looking back at 2013, I wanted to share a different kind of list.
This is my personal blog, where I share about the people I meet, the books I'm reading, and what I'm learning. I hope that you'll join the conversation.
Have a question or feedback about the site or the topics I write about?