Characteristics of Public Elementary and Secondary Schools in the United States: Results From the 2015–16 National Teacher and Principal Survey

The National Center for Education Statistics surveyed a nationally representative sample of 40,000 schoolteachers and 8,300 principals in the 2015-2016 school year. They found that the average school start time for high school students is 7:59 a.m., far earlier than what pediatricians recommend for adolescents.