I have two kids (sophmore in HS and a middle schooler) and in both their individual studies and when I'm helping them with homework we use AI pretty extensively now.
The one off stuff is mostly taking a picture of a math problem and asking it to walk step by step through the process. In particular this has been helpful to me as the processes and techniques have changed.
It's been useful in foreign languages as well to rapidly check work, and make corrections.
On the generative side it's fantastic for things like: give me 3 more math problems similar to this one or for generating worksheets and study guides.
As far as technological adoption goes, it's 100% that every kid knows what ChatGPT is (even maybe more than just "AI" in general). There's some very mixed feelings from the kids with it: my middle schooler was pretty creeped out by the ChatGPT voice interface for example.