Raters must score accurately and consistently for classroom observation scores to be valid. This requires (a) a standard defining when scoring is accurate and consistent enough and (b) measuring and remediating rater performance against that standard. Current practice has focused on this second problem to the exclusion of the first. My goal here…

In 2009, the New Teacher Project's "The Widget Effect" documented the failure of U.S. public school districts to recognize and act on differences in teacher effectiveness. We revisit these findings by compiling teacher performance ratings across 24 states that adopted major reforms to their teacher evaluation systems. In the vast…

Over the last decade, teacher evaluation has moved onto center stage in efforts to strengthen schooling. In this article, we address the question of whether focusing on this administrative process is likely to accomplish what reformers hope. We answer that question by examining the available evidence, both direct and indirect. We deepen the…

Discusses the role and consistency of judges' interpretations of teacher performance as part of an evaluative scheme for complex performance, with reference to the ideological framework of professional standards. The tension between assessment decisions and the recognition that assessment involves interpretation is explored. (SLD)