Dear Principal,
I am writing to you today to request a simple favour. I am sure that you would have seen students tired, sleepy from the overload of homework. You obviously hate students coming to your school, tired and drowsy. I have a simple solution. All you have to do is change the schedule to make school start 1 hour later and still, end at 3. This gives students more time to do homework and sleep for longer, making the students more active and energetic.
Schools are really stressful and most people love it when the school ends, but they have not found the escape out of school by going home. They are terrified of "Homework". Most teachers say to their students, after school, you can go home and rest for as long as you want. But, once you reach home, you are stuck in the trap of homework. Also, they don't get to sleep for a decent amount, especially the people on the bus. They have to leave at about 8 or 7. The bus also comes late, and the teacher blames it on the students's fault, saying that is not the bus's fault. If you make school start at 10, they have more time to sleep, and more time to do homework.
I know that you want to educate the students, so they can become sucessful in their life. They all also complain that school is tiring and they hate it. If you don't want them to quit school, you would rather reduce school by one hour, so everyone will like it more and there will be less chances of students leaving school. 
I request just this one favour. It is easy, scince you are the principal. It is very simple, and you will see more smiles on children's faces.
Sincercly, 
Inesh