Cussin'.

So many of my lessons are disrupted by pupils insulting each other. Playing "cussing" games. They go something like this one from one of my Year 9 classes:

A: You're fat.
H: Your mum's fat.
A: Say that to my face.
H: Your mum's fat.
A: Shut up, at least I've gotta mum. And she's not a whore.
Me: If you both don't stop now you're in detention.
A: But she called my mum fat!
H: But he called my mum a whore!
A: No I didn't, she's a liar, Sir!
H: You're a wasteman. Siiiiir, can you send him out?
A: Allaaai...jam your hype, bluuud!
ad infinitum...

In the mean time the whole class is distracted: some by the cussing match, some by cussing matches of their own, yet others (and these I feel guilty about because I let them down) have actually finished the work that I've set and, seeing me tied up with the slanging match elsewhere in the classroom, start doodling in their exercise books, chatting or reading something irrelevant like a magazine.

What's the solution to this? It seems that keeping the kids busy is a key element of any lesson that I want to go peacefully and without incident. But there's more to it: they have to have their heads down. You see, the Senior Management Team in their Infinite Wisdom saw it Fit and Proper to build a school with desks that could not be moved from their position in the floor. My desks are screwed into a horseshoe shape around the room which has two major drawbacks. Firstly, every child is in everyone else's line of vision. Secondly, two thirds of the class are not facing the board. There are other disadvantages; I cannot make group work easier, for instance, by grouping tables and chairs together. So if the children are keeping their heads down - working with materials on their desks as opposed to looking up to the board for guidance all the time - they will be less likely to catch sight of each other and start cussin'.