color wheel umbrellas with fingerprint rain. Not sure what kind of colour wheel this is, but I like the concept. I find it helps for future concepts to always have the complementary colour directly across from it's mate.
Silhouette collage art lesson: students used flashlights to trace each other's silhouette. After cutting them out, the covered them with magazine clipping that described their personalities and interests.
no lesson plan, but cute idea for op art extension project
50 ways to draw a tree
The Art Room: Design Elements: Space. Positive and Negative Space