In the Art Room - Op Art

Op Art is a lesson I do every year with the 7th grades, but it was getting a little stale for me.  This year I deviated from my old lesson, and tried a new one I found on Pinterest.  It looked so easy, but boy did my kids have a hard time with it!  I used my usual 12 x 18 paper, but I suggest using a smaller paper so the kids can finish in one class period. 

       

Here's my standard lesson from years past: