1. don'顷纳t be late;2. don't be absent;3. don'陆旦t sleep in the class;3. don't cheat in the exam;4. don't tell lies;5. don't copy;6.don'早乎扰t call names;7.don't fight with others.8.don't have any prejudice;9.don't throw rubbish purposely;10.don't quit school;11.don't break law;12.don't break school's rules;13. don't organized social groups without permission.14. don't spread religions;15.don't drink alcohol;16.don't shout in the classroom;.17. don't make inproper friends;18.don't help others' cheating in the exam;19.don't take any pet to school;20.don't wear inproper clothes.
i hope you can adopt it.
You cannot do the 20 things at school
don't speak aloud
