Thanks for the lesson ideas.
Here's what I did. I put out prints of Degas, Koryusai, Lautrec etc. We
asymmetrical composition as influenced by the Japanese. Compared prints
that were symmetrical with those that were asymmetrical. I spent along
time talking about Degas' painting( 7-8 minutes), The Bellili Family and
how Degas' composition revealed things about the family. Then I set up a
still life in the middle of the floor. The students dipped chalk in water
and had to draw a diagonal line and have part of the still life go off the
edge of the paper. The first class I wetted the paper...failure. Too many
rips. But after that it went well.