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Boyd, Donald; Grossman, Pamela; Lankford, Hamilton; Loeb, Susanna; Wyckoff, James – National Center for Analysis of Longitudinal Data in Education Research, 2008
Value-added models in education research allow researchers to explore how a wide variety of policies and measured school inputs affect the academic performance of students. Researchers typically quantify the impacts of such interventions in terms of "effect sizes", i.e., the estimated effect of a one standard deviation change in the…
Descriptors: Credentials, Teacher Effectiveness, Models, Teacher Qualifications
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