When an effective principal is at the helm of a school, students benefit. Principals play a critical role in establishing a school's climate and culture and in selecting and developing teachers, among other roles. Indeed, school leadership is second only to direct classroom teaching among school-level influences on achievement. Although there may…

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…