Ok, let’s say you’re having a discussion with your students and it leads to an artist whose work is pertinent to the conversation. Unfortunately this spontaneous conversation means that you have no preparation time, and you can’t find the right picture in your Art textbook (assuming you even have one). What do you do? Why, go to the Artchive, of course!
This gem of a resource, maintained by Mark Harden, lists artists my name and by genre. You’ve got a hunt on your hands if you don’t remember an artist’s name or the name of the artwork, but other than that this site is a gold mine for images that are large enough to make half decent 8.5 x 11 prints.