The use of test scores as a performance measure in high-stakes educational accountability has become increasingly popular since the enactment of the No Child Left Behind Act of 2001 (NCLB), which imposed sanctions such as the threat of losing federal funds unless a state implemented a school accountability system that measures student progress…

In this commentary, the author states that, as the contributions of the focal articles make clear, there is much to learn about how value-added models (VAMs) are actually used in a variety of settings. Indeed, it is important to remember that VAM scores are but one component of a complex evaluation system that can play out differently in different…

Growth-based approaches to federal accountability are receiving considerable attention because they have the potential to reward schools and teachers for improving student performance over time by measuring student progress at all levels of the performance spectrum, including progress by students who have not reached proficiency on state…

The federal accountability system, made universal through the No Child Left Behind Act of 2002, is a system driven by quotas and sanctions, stipulating the progression of underperforming schools through sanctions based on meeting performance quotas for specific demographic groups. The authors examine whether the current federal accountability…

Traditionally, state accountability systems have measured school-level achievement gains using cross-sectional data, for example, by comparing scores of one year's eighth graders to scores of the next year's eighth graders. This approach produces extremely volatile estimates of value added from year to year. This volatility suggests that the…

Value-added models help to evaluate the knowledge that school districts, schools, and teachers add to student learning as students progress through school. In this article, the well-known Education Value-Added Assessment System (EVAAS) is examined. The author presents a practical investigation of the methodological issues associated with the…

Many policymakers feel pressure to claim that No Child Left Behind (NCLB) is boosting student performance, as Congress reconsiders the federal government's role in school reform. But how should politicians and activists gauge NCLB's effects? The authors offer evidence on three barometers of student performance, drawing from the National Assessment…

The accountability requirements of the No Child Left Behind Act of 2001 place high-poverty schools and racially diverse schools at a disadvantage because they rely on mean proficiency scores and require all subgroups to meet the same goals for accountability. In this article, student achievement data from six states are used to highlight…