One expert says when a later school start time isn’t an option, parents and teachers can help teens develop healthy sleep habits, reports U.S. News and World Report.

Two out of three high school students sleep less than eight hours each night, even though they need between 8.5 and 9.5 hours, says Dr. Judith Owens, director of sleep medicine at Boston Children’s Hospital.

Insufficient sleep has been linked to a myriad of health issues, such as depression and obesity, and lower levels of academic achievement, Owens says.?