This is a quick one-sheet overview of the Op Art movement. It gives key information for introducing optical illusion art and provides simple characteristics of Op Art.
I use this worksheet as a jumping-off point for Op Art projects. It can be used for upper elementary grades; I use it for 4th grade.
See this product in action on my art education blog here: http://mrskart.blogspot.com/2014/04/op-art-cubes-fourth-grade-artwork.html