Sadly, it seems, Mr. Brechter was quoted as saying:
"It was an attempt to make school lively and fun. My ultimate aim was to show what words should not be used."
No no no. You were doing so well. No teacher who would make the decision to teach kids to think and talk about words we consider offensive would be aiming to tell them they shouldn’t be used. It seems unlikely that a nation that could invent strudel and that is so close to the necrophile, feces obsessed Germans would get so uptight about a word like “arse”. Isn’t “arse” more or less a German muse?