I used to be a secondary school teacher. So I did a cartoon series about it, 4 or 5 years ago. When I say it was about it, it wasn't really about it. The series was far too surreal to really be about teaching, but it was hellish fun creating it and it actually kept me sane at one of the lowest points of my life, which I won't go into. It was called Mr Beeching's Teachings, and here are a couple of sample strips. Most of them can be seen on the characters page of my website (link on the right).