How do proficiency-based accountability systems affect inequality in academic achievement? This article reconciles mixed findings in the literature by demonstrating that three factors jointly determine accountability's impact. First, by analyzing student-level data from a large urban school district, we find that when educators face accountability…

To many, it seems obvious which schools are failing--schools whose students perform poorly on achievement tests. But since evaluating schools on achievement mixes the effects of school and nonschool influences, achievement-based evaluation likely underestimates the effectiveness of schools that serve disadvantaged populations. In this article, the…

Now in its third full school year of implementation, the No Child Left Behind Act (NCLB) has been drawing praise and blame. It has been praised for its goals of increasing all students' learning, requiring disaggregated data to monitor the progress of major subgroups of students, and having high-quality teachers in all schools. It has been…