Samson.....I made a copy of that to send to my Mom who used to teach high school. I've heard her talk and I think she would concur what you outlined here is EXACTLY the way it goes for teachers.
Also...until someone has an 8th grader....the have no idea how 'unique' their little personalities (...ummm...or was that ATTITUDE) can be. It only takes about 5 minutes of dialogue with them before you get a mental picture of why child abuse occurs.
I've been so mad...I've had to get into my car and drive off just to keep from going into a frenzy.
I don't know how teachers do it. Just going to the middle school to pick one of mine up gives me a headache due to the hall noise.