MOOM, the Museum of Online Museums, is a list of museums that offer online exhibitions. In some cases the museums include virtual tours and in other cases the museums online exhibits are simple photo galleries. Some of the notable museums featured in the Museum of Online Museums include the Smithsonian, the Art Institute of Chicago, and the Metropolitan Museum of Art.

Applications for Education
Art teachers looking for examples of all manner of art work to share with their students would do well to start their searches at the Museum of Online Museums.

Here are some related items that may be of interest to you:
ArtsEdge – Podcasts and Lesson Plans
Blogs for Art Teachers