High quality shearling slippers. Teaching requires a lot of time on one's feet and having something nice and comfy to slip on after work that regulates temperature is nice.

Setting aside space for, and getting started on (the idea is you continue with a lot more of her input) an ergonomic work-from-home space for her to use as needed. People don't often realize how much work teachers have to take home and as home is not seen as the primary work location they often will work at the kitchen table, couch etc which causes back stress and so forth over time.