This link has been bookmarked by 6 people . It was first bookmarked on 04 Nov 2009, by Steve Ransom.
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one of the big-ticket items on the Obama agenda is a proposal to evaluate teachers by looking at changes in their students' test scores. A
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studies by economists demonstrating that this particular measure of effectiveness is highly unstable
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Steve RansomGreat blog post by Diane Ravitch
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