Sleep and grades go hand in hand. Yes, researchers in a new study have found a strong relationship between a student's grades and their sleep time. What time students go to bed and the consistency of their sleep habits also make a big difference. It also states that getting a good night's sleep just before a big test is not enough -- it takes several nights in a row of good sleep to make a difference, according to the study published in the journal 'Science of Learning'.
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