Why a Radnor High School start time recommendation of 8:30 a.m.?

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Why not 8 a.m.? Data on schools that moved their start times to 8 a.m. rather than 8:30 a.m. or later revealed less robust results. In schools with an earlier school start time, fewer students were able to obtain eight hours of sleep or more. This amount of sleep is the “tipping point” needed, as research reveals clear benefits for students who obtain eight hours of sleep or more with respect to depression and substance use like caffeine, alcohol, tobacco and drugs.