Several schools have average start times earlier than 8 a.m.: Alabama, Colorado, Connecticut, Delaware, Indiana, Louisiana, Maine, Massachusetts, Michigan, Mississippi, Missouri, Nevada, New Hampshire, New York, Ohio, Pennsylvania, Rhode Island, Tennessee, West Virginia, Wisconsin and Wyoming. Louisiana's average start time of 7:40 a.m. is the earliest, and 29.9 percent of the state's public schools start before 7:30 a.m.
CDC recommends that adolescents get nine hours of sleep per night, Christopher Ingraham reports for The Washington Post. "They need all that extra sleep to support their still-developing brains. But surveys consistently show that only about eight or nine percent of teens are getting that much sleep. Because teens' brains are naturally wired to keep them up past 11 p.m. or so, starting the school day later is essentially a requirement for allowing most of them to get adequate sleep."