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Evaluating Value-Added Models for Teacher Accountability


"In this monograph, we clarify the primary questions raised by the use of Value-added modeling (VAM) for measuring teacher effects, review the most important recent applications of VAM, and discuss a variety of the most important statistical and measurement issues that might affect the validity of VAM inferences. Although the document focuses on measures of teacher effectiveness, many of the points discussed here also apply to measures of school effects. The monograph should be of interest to policymakers who are considering the use of VAM for teacher evaluations or accountability. It will also be of interest to researchers who are looking to use VAM to understand teachers or looking for ways to improve VAM models."