Is that a crime? Lol
You've clearly never seen a teacher catch a child chewing in school if you have to ask that!
Ah OK, I see... When I was little, our teacher never punished a child for chewing (erasers, pencils, papers, or sleeves)... Hmm, now I find it a bit weird. :D
Ah, I believe the question is referring to chewing gum :P Teachers might be a tad grouchy about chewing pencils, but chewing gum is definitely banned in most schools around here.
Yeah, you're right. I forgot that. :P