@artemis I have a good experience and a bad experience of the pre-AI days. The bad: A 4th grade teacher circled "Ergo" - used correctly to mean "therefore" - and dinged my report down to a B+.
In the good, a high school teacher was trying to get us to use notecards and outlines and all that process correctly so that we'd be prepared for college. One of her tips was to reword the source cited on the card so that you wouldn't accidentally plagiarize. Unfortunately, my memory was spectacular, and when writing up my first draft, I managed to reconstruct large passages from the original sources. My teacher asked to see me, and she asked to see my notecards. She knew how my brain worked, and suspected what had happened. She then recommended that I write down the exact text and rewrite while writing the paper.