Honestly, most classroom rules I have seen range for unnecessary to downright silly. Do you really need to make it a rule that students bring their books to class? If they don’t, is lunch detention really going to solve the problem? Wouldn’t it be easier to just give them a book and move on?
Decide on three to five classroom rules. Any more than that and the students (and you for that matter) will have a hard time remembering them.
Principle Three Tip Sheet: Setting Classroom Rules