Spending hours in front of the TV or computer and staying up late have never been among educators' test-preparation tips, and a study released this month shows why.


Researchers at the University of Minnesota's Boyton Health Service unveiled findings that show students who get inadequate sleep and spend too much time watching TV or doing non-educational activities online have lower grade-point averages than their peers who get plenty of sleep and avoid excessive TV.


In the study, which randomly selected more than 24,000 undergraduate students from 14 Minnesota colleges, 30 percent of students reported “excessive screen time” in front of their TV

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