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This is a letter by Selena Bieber to the students in her school. http://www.nvhsstudsup.org/openletter Later Is Better! Selena Bieber Northville High School Do you feel it's hard to get up early for school and even harder to listen well in the first class at 8 a.m.? Well, this happens to most of us and is not helpful for our learning! Some studies show that teenagers' brains make melatonin, the hormone that helps sleep, between 11 p.m. and 8 a.m. So it's better for us to sleep during these nine hours. But here comes the problem. We're asked to get to school by 7:30 a.m. That means we have to get up before 7, when our brains should still be sleeping. That's why we're always so tired and can't think clearly in early morning classes. No clear head, no good learning, right? If we can't change how our body works, why can't school start later? In this way, we can not only sleep more but also learn better! Want to help us make it happen? Visit www.nvhsstudsup.org/later-better to learn more. Below is some information from another study. We studied 48 high school students and found that the students who went to bed earlier did better on their school tests. This is not only true for those who slept nine hours, but also true for those who slept less. And some of them agreed that they learned better in early morning classes. （brain 大腦 hormone 荷爾蒙）