It happens especially when there is a lot going on at home, particular lower social economic kids.
I don't know that I would limit this to kids of a particular socio-economic level. Middle schoolers, especially, from all backgrounds seem to be carrying around a lot of stress- some of it legitimate, some of it we might deem superficial. But to them, it's all legitimate. We have to respect that. Sometimes you can channel this angst into the activity at hand. Sometimes you just can't and it's best not to try.One thing I have noticed is that my male students usually give me more of an indication that they are going through a difficult time...before we reach critical melt-down stage. My female students, pre-teen or young teen-agers....I have no idea from week to week what I'm in for. We can be cruising a long great in our lesson, having a great time, and then all of the sudden...BOOOM! Or, they might come in all in a huff, but sit down and blast through their repertoire like nobody's business.(I guess I just dismissed one stereotype at the beginning of my post, and then replaced it with one of my own.)
I didnt dismiss the problems of students who are not in a lower social economic class just that their issues then to be more pressing. We all have problems but comparing those who deal with poverty, murder, abandonment on a regular basis is more pressing then others which tend to be based on social issues.