I suspect that staff quality varies wildly; but the teachers and librarians of my aquaintance (in school settings) have usually harbored no personal confusion about the difference between ‘plagiarism’ and ‘copyright infringement’. If some wild copyright maximalist hackjob of a test comes out, where the kiddies need to dutifully recount how the invention of copyrights saved academia from a hellish morass of unattributed quotations, they won’t necessarily have much of a choice; but the usual vibe, in the places I’ve seen, is “Plagiarism is serious business, and if you misrepresent others’ work as your own Things Will Be Bad. As for copyright infringement, the IT department would really prefer if you didn’t do any on the school network.”
