Principals rebel against 'value-added' evaluation
from The Washington Post (commentary)
Scores of public school principals in New York are fighting the state's new educator evaluation system, which ties the evaluations and pay of teachers and principals to how well students do on standardized tests. New York has a new law requiring that 20 percent to 40 percent of the evaluations be linked to test scores, despite warnings by assessment experts that there are too many problems with "value-added" methods of determining a teacher's quality.
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