Vajazzling is one of those things that makes me feel like a total fogey. Why, world?
My feeling is if a worksheet is handed out, it should be done, he just freaks the fuck out and says they did not say it was due or homework.
At that age, though, unless some big letter comes home about a project due in the future, papers sent home that day are generally homework due the next day.
I have no idea how you make him understand that it's an understood rule, though.