This report presents selected findings from the Public School and Private School Data Files of the 2011-12 Schools and Staffing Survey (SASS). SASS is a nationally representative sample survey of public and private K-12 schools, principals, and teachers in the 50 states and the District of Columbia. School districts associated with public schools…

Background: This longitudinal study examines the long-term effects on the achievement of students at a diverse suburban high school after all students were given accelerated mathematics in a detracked middle school as well as ninth-grade "high-track" curriculum in all subjects in heterogeneously grouped classes. Despite considerable…