This is probably the best PowerPoint for teaching Impressionism out there... EVen if you're not an art teacher, you'll probably still appreciate it for the collection of images! It contains SIXTY (yes, 60) slides and explanations for artists. Just remember two things: You'll deinitely need some background knowledge of your Impressionist artists, and as you'll see from the frequent nudity in Manet's paintings, you may want to target this to High School and up. ;-)
Sixty slides (and countless hours of work) for under $4... Wow!