What measures the best teacher? More than scores, study shows - 1450 WHTC Holland's Hom... - 138 views
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researchers found they could pick out the best teachers in a school and even predict roughly how much their students would learn if they rated the educators through a formula that put equal weight on student input, test scores and detailed classroom observations by principals and peers
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Judging teachers primarily by student performance on state tests, for instance, turned out to be highly unreliable, with little consistency from year to year. Judging them chiefly by a principal's observations failed to identify those teachers who could be counted on to boost student proficiency on state math and reading tests.
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This should be a very big red flag to all those policy makers who think they can have test-based accountability be half or more of a teacher's evaluation