it is just an excuse, i think. if they should wake early, sleep early then.

This question is best suited to the Italki Discussion group on health, Family & Home .!!!! :) :D

Hello Jura, This is what I found on parentingteens.about.com : "According to the American Sleep Disorders Association, the average teenager needs around 9.5 hours of sleep per night, possibly because hormones that are critical to growth and sexual maturation are released mostly during slumber. Yet studies show that teenagers generally get an average of only 7.4 hours a night. This is far short of the desired quota for healthy teens. Researchers at Stanford University found in a study that teenagers require more sleep, by 1 to 2 hours, than do their younger 9- and 10-year-old siblings, who only require about 8 hours of sleep. This contradicts parents, since we tend to give later bed times and curfews to our children as they get older." Sophie.