How many teachers stay, especially in the schools that need them most? The question has attracted widespread attention as policymakers have recognized that expert teaching is the most important school-related factor in student achievement. Data show that poor and minority students assigned to ineffective teachers lag significantly behind their…

Middle school advocates have launched a campaign aimed at persuading policymakers to help improve education for 10-to-15-year-olds in order to prepare more students for college and work. Among the supports, according to a "policymaker's guide" released by the National Association of Middle Schools, are licensing requirements for middle-level…