Don’t buy anything the kids will use. My first year teaching I bought all this cute, high quality stuff. Even the stuff not meant for the kids wound up borrowed, broken, or stolen. If you want to get her something work related, either ask or go for things most professionals appreciate. A really nice bag, a good lunch box, a quality travel mug (no regular ceramic mugs please). Maybe program automated email responses for when she’s answered the same parent question 800 times.