Test-based accountability as well as value-added asessments and much experimental and quasi-experimental research in education rely on achievement tests to measure student skills and knowledge. Yet, we know little regarding fundamental properties of these tests, an important example being the...

School districts are confronting difficult choices in the aftermath of the financial crisis. Today, the financial imbalance in many school districts is so large that there may be few alternatives to teacher layoffs. In nearly all school districts, layoffs are currently determined by some version...

We are in the midst of what amounts to a national experiment in how best to attract, prepare, and retain teachers, particularly for high-poverty urban schools. Using data on students and teachers in grades 3–8, this study assesses the effects of pathways into teaching in New York City on the...