I use AI to help my high-school age son with his AP Lang class. Crucially, I cleared all of this with his teacher beforehand. The deal was that he would do all his own work, but he'd be able to use AI the help him edit it.

What we do is he first completes an essay by himself, then we put it into a Claude chat window, along with the grading rubric and supporting documents. We instruct Claude to not change his structure or tone but edit for repetitive sentences, word count, correct grammar, spelling, and make sure his thesis is sound and pulled throughout the piece. He then takes that output and compares it against his original essay paragraph-by-paragraph, and he looks to see what changes were made and why, and crucially, if he thinks its better than what he originally had.

This process is repeated until he arrives at an essay that he's happy with. He spends more time doing things this way than he did when he just rattled off essays and tried to edit on his own. As a result, he's become a much better writer, and it's helped him in his other classes as well. He took the AP test a few weeks ago and I think he's going to pass.