As a student,it is very important for us to know what to do and what not to do.In schools,we should go to school on time.Don't be late for class.In class,we should listen to the teacher carefully.Homework must be done.Don't copy other's homework.We should take an active part in sport and keep healthy.We should always be ready to help the people who are in trouble.When waiting for a bus,we must stand in line and wait our turns.Don't push or jump the queue.In a bus,we should not speak loudly or spit in public.Don't litter things about.It's our duty to protect the environment around us.
If every one does so,I am sure he will be a polite student.