I like to get them a little something and include the TAs in that too. With 3 dcs at school now (and one being taught by a job share too!) that means 8 pressies to buy! So I need to keep the unit cost down. Running out of ideas as one of the teachers has taught one or other of them for 4 out of the past 5 years!
In the past I have done wine, pretty tealight holders, personalised notebooks from Funky Pigeon, real ale for the male teacher. Last year I got them all handwarmers (picked up in a sale for about £4 each).
I try to steer clear of chocolates usually as I am guessing they get tons of it (dm was a teacher and she always did!)
Would love to hear any other ideas.