| http://www.w3.org/ns/prov#value | - ly relating to putting the new evaluation system in place.In their letter, the New York principals cite a number of concerns, but the big one comes down to test scores, and the value-added model that, in theory, isolates the teacher's contribution to a student's improvement on standardized tests.In New York, other measures, including observations, also factor into evaluations, but the state has de
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