It will only encourage them to sleep later. Then that time will also become early because their bodies get used to that time and when they go to bed later then this will be a problem because they will receive equal amount of sleep from before. On the other hand, if the school starts school later then it will have to end later and that wouldn't be good because there are activities, clubs, sports, etc. that students will attend after school. Getting home late will prevent students from attending anything after school because once you get home you have other things to do such as: homework, chores, or something to do and you won't have time for that if you are getting back home late. Then it leads to having bad grades in school. Staying up late is one of the bigger reasons why it's harder to wake up early. There are many reasons as to why teenagers are up late because they are having to do a load of homework or are on their electronic devices checking their social media or just getting distracted by it in general. Maybe the student is taking harder classes and he/she has a ton of homework to finish and turn in by the next day and takes