Researchers have raised a number of questions about whether student achievement data can be used fairly or accurately for purposes of teacher evaluation. Others have noted that achievement data alone cannot provide teachers with the information they need to improve their practice. Recognizing these limitations, the federal government and many…

This report summarizes findings from a two-year study of Chicago's Excellence in Teaching Pilot, which was designed to drive instructional improvement by providing teachers with evidence-based feedback on their strengths and weaknesses. The pilot consisted of training and support for principals and teachers, principal observations of teaching…