We consider the challenges and implications of controlling for school contextual bias when modeling teacher preparation program effects. Because teachers are not randomly distributed across schools, failing to account for contextual factors in achievement models could bias preparation program estimates. Including school fixed effects controls for…

The utility of value-added estimates of teachers' effects on student test scores depends on whether they can distinguish between high- and low-productivity teachers and predict future teacher performance. This article studies the year-to-year variability in value-added measures for elementary and middle school mathematics teachers from five large…

Most studies focus on the effects of charter attendance on short-term student achievement (test scores), using either data sets that follow students over time or random assignment via school admission lotteries to control for differences between students in charter and traditional public schools. Beyond measuring achievement effects, however,…