schoolstarttime.org↗

The Impact of School Start Times on Adolescent Health and Academic Performance

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In the early 1990s, researchers from Brown University (1) and the University of São Paulo (1.5) found initial evidence that circadian biology drives the delayed sleep-wake patterns of adolescents. (1, 1.5) Subsequent studies have confirmed puberty’s onset marks the beginning of a phase shift, with adolescents going to bed later and rising later than younger children. (2, 2.5, 3, 4) Typically…

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Last crawled2026-09-22homepage read

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Website	schoolstarttime.org ↗
Site language	English
PageRank position	#3,843,936
Rank · Jun–Aug 2026	#6,914,573

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