Teacher evaluation systems that use in-class observations, particularly in high-stakes settings, are frequently understood as accountability systems intended as nonintrusive measures of teacher quality. Presumably, the evaluation system motivates teachers to improve their practice--an accountability mechanism--and provides actionable feedback for…

In 2011, the U.S. Department of Education granted states the opportunity to apply for waivers from the core requirements of the No Child Left Behind Act. In exchange, many states implemented systems of differentiated accountability that included a focus on schools with the largest achievement gaps between subgroups of students. We use…