Pupils mustn't take a pet to the lesson.
Pupils mustn't speak loudly in the classroom.
Pupils mustn't sleep in the classrooms.
Pupils must answer the teacher's questions.
Pupils must say "Good morning" to the teacher.
Pupils mustn't write notes to friends.
Pupils mustn't draw on the walls of the classrooms.
Pupils mustn't run and jump between the desks.
Pupils must be polite to other classmates.