I know my wife GREATLY appreciated gift cards to book stores (with all of these purchases ending up back in the classroom for the kids!), resturants, manicures, etc. Home baked goods are also appreciated (especially by me!). But whatever you do....PLEASE do not get anything with an "apple" theme and/or "#1 Teacher" on it!!!!! These may sound nice but multiply this times all the students in the class times the number of years teaching and you get way too many! Even if the gift card is only for $5 or $10 dollars, it is still more appreciated than the dreaded "apple" gifts!
Hope this helps!