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
What I learned from Lyon Terry, my state’s Teacher of the Year.
Three ways teachers and students are using computers to improve their work.
The US is expected to face a shortage of 11 million skilled workers unless more students start getting college degrees.
I went to Arizona to learn about a new era of online learning.
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.
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