Several research studies encourage later start times for middle or high schools. 

  • American Academy of Pediatrics recommends middle and high schools delay the start of class to 8:30 a.m. or later. Doing so will align school schedules to the biological sleep rhythms of adolescents, whose sleep-wake cycles begin to shift up to two hours later at the start of puberty.  American Academy of Pediatrics, August 2014

Other districts' experiences with initiatives to change to start times