Sleep cycle. awake, which is slower than the adult 2 hours but now. High school in the United States, over 40% of time enrolled before 8.00 am, which equals the average time of a middle school.
The sleep wake cycle later than 2 hours, but now adult high school in the United States, more than 40% of the time in school before 8.00 am., Which is equal to the average middle school.
Sleep wake cycle which is slower than adults 2 hours. But now high school in หรัฐกว่า 40% have attended before 8.00 pm. The average time of junior high school.