Professional Learning for Busy Educators

Many American teenagers try to put in a full day of school, homework, after-school activities, sports and college prep on too little sleep. As evidence grows that chronic sleep deprivation puts teens at risk for physical and mental health problems, there is increasing pressure on school districts around the country to consider a later start time.

In Seattle, school and city officials recently made the shift. Beginning with the 2016-2017 school year, the district moved the official start times for middle and high schools nearly an hour later, from 7:50 a.m. to 8:45 a.m. This was no easy feat; it meant rescheduling extracurricular activities and bus routes. But the bottom line goal was met: Teenagers used the extra time to sleep in.

Researchers at the University of Washington studied the high school students both before and after the start-time change. Their findings appear in a study published Wednesday in the journal Science Advances. They found students got 34 minutes more sleep on average with the later school start time. This boosted their total nightly sleep from 6 hours and 50 minutes to 7 hours and 24 minutes.

Tell me if this sounds familiar: Your alarm goes off at 7:00 am. It’s a school day. It’s time to get out of bed and get ready to make that early morning bell. But in that moment, you feel as though there is no force on the planet that could make you open your eyes and surrender your comfortable position under the covers. Your mom comes into the room, already dressed for work. “You know,” she says, “you wouldn’t be so tired if you’d just gone to bed a little earlier.”

Is she right? Also, why isn’t she ever tired in the morning?

Most teens would agree that they’re much sleepier in the morning than their parents are. There’s a single molecule that’s largely responsible for this difference. And no, it’s not caffeine - it’s melatonin!