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Thoughts on teaching science and whatever else comes to mind. Title from, among other places, the Clay Shirky tweet: "[T]he only good measure of student progress I know is the number of open problems they can successfully characterize."
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Hey Dr. Phil, I like this one even better!
ReplyDeletehttp://www.nikon.com/about/feelnikon/universcale/index_f.htm
It goes from femtometers to lightyears =)