I don’t know how old said students are. In high school, they could be anywhere from 14-19. They could look like young kids or like young adults.
I’m somewhat embittered by the fact that I had teachers that were ill-prepared to deal with the age level they were assigned. You’ve got to have some level of experience or knowledge (sophistication ?) of what a given group is capable of. One teacher I had was so incompetent at being able to control her class (this being 6th grade), that on one occasion at the end of the year, I let her know in no uncertain terms she was thoroughly unfit. She knew I was right.
In the case of this guy, it seems a similar problem with students of a level that are beyond his capability to either understand or control. Hence he might be better off teaching a lower grade where the likelihood of such an incident happening is more remote. Naïveté is not a positive trait for a teacher dealing with older students. They need to be able to anticipate and spot bad situations and handle them before they erupt. His naïveté may have, in fact, exacerbated the situation.
You do have a different take on it than I do. It was stated that he’s not a new teacher. I don’t think he’s incompetent. I think he has a couple “bad apples”.
6th grade. That is about the worst grade.