Public schools can survive without cops being called in to resolve classroom or hallway disputes, fights, or even worse.
My mother, by choice, for many years taught in an elementary school in an extremely under privileged area. Every fall before school began construction crews had to smooth over bullet holes shot both inside and outside the school. She was physically attacked more than once by the fourth graders she taught, an absolutely common place occurrence in that school.
And yet....she never struck back, nor did her colleagues, nor did the principal. It was against the law, for one, which the students were well aware of.
If cops had been in the school they would have been arresting and and hauling out students daily. Instead every teacher had to deal with the reality of being defenseless against likely assault, which made for an extremely difficult and unpleasant work environment, but one in which they learned how to manage chaos without resorting to violence.
