One of the most important things school systems can do to promote student achievement is to ensure that all students have effective teachers. Effective teachers may be particularly important for the most disadvantaged students. The U.S. Department of Education commissioned the American Institutes for Research (AIR) to create this report as a…

There is often confusion about distinctions between growth models and value-added models. The first half of this paper attempts to dispel some of these confusions by clarifying terminology and illustrating by example how the results from a large-scale assessment can and will be used to make inferences about student growth and the value-added…