Can't get to the museum? Bring the museum to your kids!

Many museums these days have excellent online presences.  I particularly like the Metropolitan Museum of Art in New York, which has a great section on their site that's a timeline of art history.  You can search by time period, region of the world, or even by thematic essay topic.  Perhaps you're interested in teaching about Chinese Buddhist sculpture, or Byzantium.  Sending your students to this site can give them a window into these cultures and many more.