Sometimes a simple change of setting wakes a kid up. A change of setting could wake up some parents too. Nothing gets the attention of parents like sending kids home. The school board approves about 20 to 30 expulsions a year. But you wouldn't even want to know what it takes to get a kid expelled in a district where there are 10 times as many kids being readmitted to schools from prisons as there are being expelled.
Schools offer peer mediation and conflict resolution to deal with occasional violence.
There are in-school suspensions and disciplinary schools. But there are some kids we can't reach and, for the sake of the ones we can, those kids may have to be cut loose.