Art Sub Plan - Op Lines
The blog, Kids Art Market, has written up directions for a lesson that could be used by an art sub. Don't you love it when someone else has already done the work and shared it???
Mollie Morrisey based her lesson on the art of Victor Vasarely, the father of op art. She gives basic info about that artist in her blog post.
It reminds me of another blog post here. It is a one day art lesson with shapes done, not that much unlike, these concentric circles. I also linked to an art history lesson on Kandinsky that could serve as an intro to the lesson. You can see that blog post here: One Day Art Lesson