Quite a few I bet.
I've read several op-eds by educators suggesting that they'll need to start doing more in-class essays, oral examinations, and various other forms of work that aren't the five-paragraph essay ...
... which is overdue anyway, as they also point out: The five-paragraph essay was always a rather wretched little form, utterly divorced from the many ways that humans write interesting, fact-driven, and persuasive texts -- including the ones we're exchanging right now!
So GTP-3 may serve to knock high-school- and college-level pedagogy out of its slumber, if we're lucky.
We may not be lucky ...