Teachers in 13 states are evaluated using value-added models (VAMs), a measure of student growth on standardized tests. The problem is that value-added models evaluate intermediate-level teachers' ability to have students perform on a standardized assessment despite other factors affecting students' academic performance, such as socioeconomic…

Evidence that teachers' short-term instructional effects persist over time and predict substantial long-run impacts on students' lives provides much of the impetus for a wide range of educational reforms focused on identifying and responding to differences in teachers' value-added to student learning. However, relatively little research has…

The increased emphasis on using student growth measures in teacher evaluation has raised questions about how to treat test scores from students with disabilities. This study explores the consequences of three common approaches for treating scores from students with disabilities in statistical approaches to estimating teacher effectiveness: (1)…

Education agencies are evaluating teachers using student achievement data. However, very little is known about the comparability of test-based or "value-added" metrics across districts and the extent to which they capture variability in classroom practices. Drawing on data from four urban districts, we found that teachers were…

This study compared five value-added models and illustrated the impact of model choice on the estimates of teacher effectiveness. The five models covered a broad range of technical procedures, some very simplistic and others very sophisticated. The five value-added models were applied to a common data set to generate teacher-effectiveness measures…

High-quality measures of instructional practice are essential for research and evaluation of innovative instructional policies and programs, as well as for providing feedback to teachers and administrators. In this study, the authors examined whether using anchoring vignettes in web-based surveys improved the validity of teachers' self-assessments…

Teacher evaluation is at the center of current education policy reform. Most evaluation systems rely at least in part on principals' assessments of teachers, and their discretionary judgments carry substantial weight. However, we know relatively little about what they value when determining evaluations and high stakes personnel decisions. The…

This paper examines the value added by engaging pre-service teacher candidates in action research. At a time when teacher preparation programs are under pressure to respond to state and national assessments, extend field experiences, and meet other external demands, what added benefits are gained from also requiring action research from the…