http://tinyurl.com/cg3qyf
TED stands for Technology, Entertainment, Design. It started as an annual conference with the world's most fascinating thinkers and doers who are challenged to give the talk of their lives (in 18 minutes). More tan 200 of these talks are available online. Look at the math section on siftables--computerized hands-on learning "toys".
TED Videos, K-12
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