blind swearing
A game of genuine bravery. Wait until the teacher's back is turned, then stand up, with your eyes closed, sticking two fingers up. The longer you dared do it, the cooler you were. If they teacher discovered you, then you could almost plead ignorance - you had your eyes closed, so you didn't know your fingers were up. Sort of thing.
written by Ol*y L*mb*rt, approved by Log

Similar, yet slightly different, story revolving around sticking your fingers up at teachers. We had an art teacher called Mrs Houlden who was - essentially - somebody's crazy old granny but had become somehow cosmically detached from this destiny. Her inane peculiarities got her short thrift in a class full of the worst scum in our school (And me). Whenever she would turn her back to write on the board, the entire back row would stand up and make as many comedic gestures as possible. Being fifteen, comedic gestures is basically limited to two fingers - or if brave - one finger. The magic of the game was predicting how long she would remain staring at the board and therefore who could hold out the longest. Like chicken, but with coarseness. Even if she couldn't possibly have avoided seeing us, she still never said anything.

She also used to say "Freeze!" at regular points during the class if she wanted us to stop doing something. Of course, we would then all strike outlandish poses and stand like statues until she yelled at us to stop. She was also subjected to two industrious young men who took her quaint usage of the words "Crooks and nanny" to it's logical extent by writing "Cocks and fanny" all over the art paper. Or my mate who whilst doing a still life of a bowl of fruit was instructed that it could do with more bananas and then returned the drawing half an hour later with every single inch of paper covered in bananas.
written by Jo*n Fe*lows, disapproved by Phil

One way to make blind swearing far more scary was to wait until a techer left the room. This is because you never knew how long they would be, and every time a teacher walks into a room, they tend to survey the class and everyone shuts up.

The other version was to stand on the desk and see how high you could count, before some kid pushed you off.
griff
written by gr*ff ., deleted by Phil