Research on academic achievement has demonstrated the important role that teachers play in improving student outcomes and has also revealed wide variation in teachers' qualifications and experiences across schools. Schools serving low-income students in urban areas, for example, have fewer well-qualified teachers than schools in nonurban settings…

Adolescents spend a large proportion of their day in school or pursuing school-related activities. While the primary purpose of school is the academic development of students, its effects on adolescents are far broader, also encompassing their physical and mental health, safety, civic engagement, and social development. Further, its effects on all…