At most schools in Malaysia, classes begin at 7:30 a.m. But I’ve read that sleep researchers say that teenagers aren't meant to climb out from under the covers that early. Sleep patterns change during adolescence, why can’t some parents see this??? Teens tend to stay up later at night, whether socializing or doing homework, and sleep later in the morning, but yet, parents still force people to us, teens to sleep earlier. Teens around my age need about 8.5 to 9.25 hours of sleep each night. So, shouldn’t schools start school’s later?