There are always a few pupils dancing out of the line. It is kind of cheap to blame the teacher for them not willing to participate in the lessons. Don’t you think so?

And my long nights where probably due to things I were more interested in, as in going to school. Or because I were meeting friends and having alcohol with them… being exhausted sounds like there is a severe problem the pupil is not taking part in the lesson. I were just lazy and had better stuff to do, beside school.
One could argue thats a severe problem, I think it worked just fine for me, and that it is somewhat normal around that age.