I taught social studies to 7th and 8th grade boys in a black hat yeshiva last year.
Worst experience of my life.
These boys had no respect, some of them knew plenty about pop culture, one had cigarettes (in the black hat world, I suppose smoking isn’t seen as a sign of deviance, since plenty of “frum” men smoke), and plenty were violent and abusive towards the teacher and themselves. I also found that they couldn’t write an essay if their lives depended on it.
In many cases, the problem is the student, not the teacher.