Every year we invest billions in professional development to build teachers' capacity to better address the diverse academic needs of every student. Yet student learning continues to fall short of expectations in too many places. We must ask the question: Is there a better way to invest in the professional learning of teachers across America? Our…

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…