Bakalar, N. (2018, December 12). Starting School Later Really Does Help Teens Get Sleep. Retrieved February 13, 2019

When starting times at two Seattle schools were pushed from 7:50 a.m. to 8:45 a.m., 10th-graders got 34 more minutes of sleep on average and their grades increased by an average of 4.5%, researchers reported in the journal Science Advances. “I see less first-period tardiness,” says high-school teacher Cynthia Jatul, “and far fewer students sleeping in class.”