Lesson Plan: Op Art Spheres (the easy way)

This is an exemplar I having been using for while; image from hereTeaching about Optical Illusions is so much fun. I have been doing the following lesson for as many years as I have been teaching. The ones I have here aren't quite finished, but I thought I'd share some in-process with you.I recommend this… Continue reading Lesson Plan: Op Art Spheres (the easy way)