I'm waiting for one of the relatives of the assaulted teacher to kick some of these kids a*ses after school hours. I'm surprised it hasn't happened, or has yet to be reported.
If these unruly students knew that they would get a thorough beat-down (or threat of a beat-down) for assualting one of the teachers, they would think twice before "throwing the chair" the "punch in the stomach" or the "spit in the face" that you are hearing about these days.
Sorry, but if it were my wife, sister, or mother that was assaulted in the fashion that I'm hearing on this thread, and nothing was done about it, you bet that I wouldn't take things lying down.