I'm a teacher, too. I enjoy anything I get. It is nice to be thought of this time of year. Personally, I give my own child's teacher a gift card for a restaurant, Home Interior candles, or Bath and Body hand soaps.
My husband is also a teacher. In the past he has gotten...
1. favorite sports team items...magnet, banners, etc.
2. Outback gift certificate
3. Local wing place gift card.....
Hope this helps