Doctors say teenagers need eight to 10 hours of sleep each night, but according to the National Sleep Foundation, 87 percent of high school students don’t get that much. That impairs their judgment and concentration and can cause anxiety, depression and even thoughts of suicide.
. . . Research has found that when kids become teenagers, their circadian rhythm – or internal biological clock – shifts to a later time, making them biologically inclined to fall asleep about two hours later than they used to.
But waking up early to get to school on time cuts off their deepest and most productive hours of sleep.
Students think the way to learn is to stay up late and cram, said Nora Siegler, 17, a student at Menlo-Atherton High near Stanford. “I think the biggest takeaway from the lecture was how vital sleep is for memory retention and consolidation of memory.”
Some high schools are pushing back start times so students can get more sleep. “Nearly 10% of U.S. high schools currently start before 7:30 a.m., 40% before 8 a.m., and only about 15% after 8:30 a.m.,” writes Terra Ziporyn Snider of Start School Later. Some teens must wake at 5 or 6 a.m. to catch a school bus. Middle and high school students build up a “huge sleep debt every week of the school year.”
When my daughter was in high school, she’d sleep 12 hours or longer on weekends to catch up.