Adjusting the high school start time may seem advantageous in order to accommodate an expanding schedule. However, studies show that it is biologically unhealthy for teenage students to start school so early and many researchers advise strongly against it. Mary A Carskadon, a professor who studies sleep patterns, carefully analyzes the destructive affects of sleep deprivation. Despite popular belief, sleep patterns are actually greatly affected by biological changes in the body, including puberty. Carskadon points out that it is not the fact that high school students go to sleep later than younger children that causes them to seem more tired. Instead, during puberty, the body experiences a "delayed phase preference" which results in difficulty...