C.D.
i think gift cards are the way to go. if you want to add a little creativity, make a movie basket/gift bag with a blockbuster gift card and microwave popcorn and couple candy bars. having been a teacher myself, baked goods are thoughtful but there are too many around over the holidays; candles are cliche; lotions and the like are cliche as well. ( : although gift cards seem kind of un-creative these days, just adding a note of sincere appreciation makes them a thoughtful gift. yes, starbuck is overdone unless you know the teacher loves coffee. barnes and noble or borders are great places for gift cards.
good luck!
C.