Ace Online Schools has a list of 20 teaching misdemeanors, ranging from a teacher who openly snorted cocaine in front of her class and another who accidentally browsed bondage on his computer, forgetting it was hooked up to a projector screen in front of his class.
Then there is the Chinese school that makes its pupils stand on 4′-wide 3rd-floor window ledges to clean the windows (with no safety harness).
And the teacher disguised in a hooded sweatshirt to played a trick on their class, knocking on the windows of a classroom full of pupils who had been told a madman was on the loose. It was less than a month after the Virginia Tech gun massacre.
Read more, and be glad your schooldays are behind you.