You can use any of the 4600 images without restrictions. Read about this wonderful new resource on the Getty blog. And you can browse available images here. I wonder if other museums do this or will do this?
Well, I no longer teach digital art. I teach traditional media now at the college level as well as high school level. But I keep the blog up because the posts are usually not time sensitive and can still serve as valuable resources to those of you still teaching digital art.
Please continue to feel free to share any ideas you have with me for me to post.
ADDENDUM: I should never think that things don't change! Back to teaching Computer Graphics this year... which really should just be called Graphic Design. Aren't we about a generation behind on that? I might have rolled hot wax onto type when I worked layout...but really, I bet most of you have never done graphic design before computers.