Back when I was looking things up for my Digital Preservation and Copyright story I found a bunch of info the University of Texas System had gathered on issues related to copyright, libraries, and education. In among the pages on copying copyrighted works, A/V reserves, and electronic reserves I found a document titled: Educational Fair Use Guidelines for Digital Images.
It’s some interesting stuff — if you get excited about copyright law. Beware, however, that they cite Texaco a bunch, and Laura Quilter has issues with that.