The science behind delayed school start times
are largely a holdover from when most families didn’t have two working parents and thus didn’t need to worry about adhering to a 9-to-5 schedule. The juggling act of scheduling bus routes, classes, athletics, and other extracurriculars has kept bells ringing early.
But these schedules are not grounded in science. The mismatch between teenagers’ internal rhythms and external schedules sets them up to fail, studies have long suggested. found that when a small group of students started school about an hour earlier than they had previously, they experienced “significant sleep deprivation and daytime sleepiness.”conducted five years after seven public high schools in Minneapolis switched their start times from 7:15 a.m. to 8:40 a.m. found that the shift allowed kids to get about an hour of extra sleep per night; students also reported better attendance and fewer symptoms of depression.
, researchers examined students at a Rhode Island high school after it moved its start time from 8 to 8:30 a.m and found that students got an additional 45 minutes of sleep per night, while reporting less fatigue and better moods.
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