Oh, I've had a few..
The most recent was a substitute teacher when one of mine was out for two days, this was a couple of weeks ago. The day after he left (a day early), all of the teachers had been sent an email, stating that he was a sexual predator and was not supposed to be anywhere near a school campus or bus stop, and that it had all been some sort of mistake.. It was a bit late, since we'd already had class with him for two days and he'd done nothing but hit on girls.

I once had an English Lit teacher that failed everyone. Everyone. And not because they'd failed, but because she lost all of our work. She was let go for various reasons, and when she was gone they found it hidden away in cabinets.

My Spanish teacher last year, Mrs. Urdegar, was insane. And she didn't speak Spanish. Her clothes were scary and covered in sequins of assorted colors, her glasses were crooked, and she looked like a reject from a mental hospital. At one point her pants fell down in class and she continued to "teach", which basically consisted of rambling about when she worked for Nabisco.

I have on teacher at the moment who will go from rambling on about literature in a normal tone of voice to screaming, eating chalk, standing on desks, throwing chairs at things and talking to these two statues of cows she has on a desk. And then either go back to teaching as though nothing has happened or talk to herself. But we learn. Amazingly.
(Fodqou, Fri 11 Nov 2005, 3:45, Reply)