Teacher evaluation has emerged as a major focus for reform at the highest levels of education policymaking, and for good reason. Most evaluations are based on scant evidence of actual effectiveness, produce inflated ratings, and provide teachers with little useful feedback. This paper offers policymakers and practitioners important "lessons…

Status quo approaches to teacher evaluation have recently come under increasing criticism. They typically assign most teachers the highest available score, provide minimal feedback for improvement, and have little connection with student achievement growth and the quality of instruction that leads to higher student growth. A more comprehensive…