Bleary-eyed students get up too early.

• Position: School Days - Brief article

Fewer than one in five middle and high schools in the U.S. begin the school day at the recommended 8:30 a.m. start time or later, according to data published in the Morbidity and Mortality Report from the Centers for Disease Control and Prevention, Atlanta, Ga.

Schools that have a start time of 8:30 a.m. or later allow adolescent students the opportunity to get the recommended amount of sleep on school nights: about 8.5 to 9.5 hours. Insufficient sleep is common among high school students and Is associated with several health risks, such as being overweight...