Back in the day kids actually behaved because they got punished at home and at school. Look around, children tell their parents what to do and try to do the same at school. Teachers hands are tied because all we can do is reward good behavior and look past the bad behavior. All of this is done without another adult in the room along with bathroom trips, tattling, hitting, talking, etc. and we must teach them and keep in mind their are at least 25 children. Try it and then see what you have to say about not having teacher's assistants.