A recent study proves the relationship between learning and sleep  The researchers published their findings in Learning Science, a collaborative journal of Nature, pointing out the quality and time of sleep and the persistence of sleep habits are positively correlated with academic performance
Adequate sleep is more beneficial to students' study
The vast majority of high school students are faced with the disturbance of lack of sleep, in order to study, many of them will choose the time of the recess or PE class to make up for sleep.