The accountability framework is based on principles that all schools can be successful and all Tennessee students must be served well. It is determined by a variety of measures, including chronic absenteeism, discipline, and TNReady scores. All schools are rated on both how they serve the full student population and how they are specifically serving student groups that have historically been underserved: students with disabilities, English learners, economically disadvantaged students, and African-American, Hispanic, and Native American students.