LOL, are you speaking from experience? I'm sure there are many who try, and I remember some!, and many teachers who hear it coming (no pun!) and halt it in it's tracks. LOL. And a few teachers never get it when they're being played.
Second hand, from the teachers in the family, both here in the States & in England...oops; can't say that anymore...The UK.
As for me, I went to school back when getting caught using it in the bathroom, let alone saying ot to a teacher was a near capital offense. I could not be a teacher, as I am too pedantic, and not sensitive enough.LOL
They also would not like my grading curve; the curve would be drawn to fit the grades; not the grades be fitted to the curve.