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The Effect of Early vs Delayed Start Times of Classes on Grades of High School Students


by Karen Tarnow October 10, 2005

Early high school start times have been implicated in adolescent sleep insufficiency; however the effect on school grades has not been investigated, except by student self-report. Therefore, the purpose of this study was to compare the grades of high school students in academic classes that ended before 9:30 am to the grenade of students taking the same course taught by the same teacher later in the day. The grade averages from 1218 paired classes (61,000) students were evaluated for difference. Statistical analysis of the data of all subject courses grouped together revealed a trend, with morning grades being lower than the grades from the same class later in the day.


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Cite This Article as: Teachers College Record, Date Published: October 10, 2005
http://www.tcrecord.org ID Number: 12217, Date Accessed: 4/29/2017 7:20:05 AM

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