Background/Context: Parents and policymakers have long believed that some schools are more effective than others. State testing requirements under No Child Left Behind helped publicize the widely understood fact that schools differ substantially in their students average test scores and treated such scores as key proxies for school quality. More…

In partnership with the Louisiana Department of Education and through a grant from the Walton Family Foundation, Mathematica conducted a study that measured each Louisiana public high school's promotion power, which is a school's effect on the long-term success of its students as indicated by high school graduation, college or career readiness,…