Decades of research evidence have consistently suggested teachers are the most important in-school factor related to student learning and achievement. Being taught by an effective teacher has important consequences for students' academic outcomes as well as longer-term impacts on postsecondary success and lifetime earnings. Yet how to measure…

The criteria for determining the student outcomes that define a school as having "turned around" are not well defined, and the definition of turnaround performance varies across studies. Although current policy initiatives offer guidelines for identifying CLP schools, there is no standard definition or methodology in common usage. This…