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The Wharton Group

Discover France: Art Periods: Cubism

For Students 9th - 10th
A detailed history and explanation of the ideologies behind cubism. Lots of cubism links as well.
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Khan Academy

Khan Academy: Art History: Paul Cezanne: The Bather

For Students 9th - 10th
Features an in-depth look at Paul Cezanne's painting 'The Bather', which is an excellent example of Post-Impressionism art.
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Ducksters

Ducksters: History: Timeline of Western Art for Kids

For Students 1st - 9th
Kids learn about the timeline of the history of western art movements. From Renaissance to the Impressionists and Modern Art.