I am a big fan of using images in the classroom. Google Images is great, but seeing photos in context is even better. Next time you need a photo prompt for an essay, context for a lecture, or you want to incorporate some old family photos that you collected on Grandparent's day, try historypin and see your old photos at the spot they were first captured.
Looking for a cool project? Try collecting and uploading a historical photo essay of your town or neighborhood.