{How Do You Do} Teacher Gifts?

Don’t forget_to smileWe usually just chip in for the class gifts, but I've always sort of toyed with the idea of either making something or buying a special, personal gift. I've heard a bunch of times that there are things that teachers might prefer as gifts (and things they might not prefer) so I'm still on the fence. What about you, how do you do teacher gifts? Chip in, make, buy?