Michael Clark • February 16, 2012, 10:03 PM
Student test scores are not an accurate measure of a teacher's effectiveness; for any given teacher they tend go up and down from year to year like an elevator. They reflect far too many factors that are entirely outside of the teacher's control. So assigning them any proportion at all in a teacher's evaluation is illogical. It shows how much the loony teacher-accountability movement has been able to stampede everybody toward their preferred solutions.
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