Can you describe the worst teacher you ever had?

Only one who stands out in my mind is a college professor - male, seemed near retirement age at the time (20 years ago), so he may be deceased by now.

Music History (I was a music major). All the guy did in class was read aloud from the text. Each class he would assign a couple chapters to read for the next class. And then read aloud from those chapters. The worst part about it was he took attendance each class and attendance was mandatory. I forget the penalty, but missing affected your final grade.

Totally boring, droning voice, just reading aloud. Complete horseshit. And making attendance mandatory? What a bunch of fucking bullshit.