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Direct linkKoedel, Cory; Betts, Julian R. – National Center on Performance Incentives, 2009
Value-added modeling continues to gain traction as a tool for measuring teacher performance. However, recent research (Rothstein, 2009a, 2009b) questions the validity of the value-added approach by showing that it does not mitigate student teacher sorting bias (its presumed primary benefit). Our study explores this critique in more detail.…
Descriptors: Teacher Effectiveness, Teacher Evaluation, Models, Statistical Bias
