1 You mustn't be late for classes (/lessons)
1 You should come to school in time.
2 You shouldn't skip lessons.
2 You have to wear a school uniform.
3 You mustn't talk with your classmates during the lesson.
3 If you want to ask a question or to answer it raise (put up) your hand.
4 You mustn't litter at school and break school plants.
4 You must listen carefully to your teacher during the lesson.
5 Keep safe any school property.
5 Don't take other people's things.
6 Ве polite and helpful. (= Be friendly and help others)
6 Don't run and jump during the break. Don't push other students.