How's this for a coincidence? I just posted the other day about sign language, and now I've read in our local free newspaper that our local primary school is to start teaching the pupils British Sign Language! I can see it catching on. Imagine, if you are 10 or 11 and you are taught a language that your parents and very few grown-ups understand, what mischief can be plotted, in plain sight! Teachers will at last have silent classrooms, but at what price? It won't take long for children to completely master the language, and be free forever from the tyranny of adults.
Oh, and it's wholly inclusive of deaf children who are now likely to be at the centre of events, instead of on the periphery.