Sunday - Thursday : 10:00pm - 6:15am. 6hrs and 15mins, need the beauty rest for school!!
Might want to sleep a little more for school, because 10 - 6:15 is 8 hours, 15 minutes, not 6.

As for me, I usually fall asleep between 10 and 11 and am up around 5:30, quarter to 6. So anywhere from 7 to 8 hours a night. On the weekends, depending on what I'm doing, I could go to sleep as late as 3 in the morning. My internal clock (or bladder

) still has me up early, but I usually read the paper and then take a "nap" until 10 or 11.