Frank Stella's Protractor Series

Being that my husband in a math teacher I am always on the lookout to incorporate math in an artistic way.  Frank Stella's protractor series does just that.  I had the students look at his paintings and asked how he placed the protractor on his paintings.  Some answers I received was that protractors appeared:
-upside down
-right side up
-diagonal
-overlapped
-connected
-place next to or below another protractor
The list is really endless.  I gave each student a protractor (purchased from my own pocket) and had them trace in 4 or 5 times.  To create a better colored pattern students were told to only use 4 or 5 colors and the shapes were colored in using markers.  The kids love markers, as do I for the easy clean up.   The result are these beautiful abstract drawings.  These are 2 works in progress I will post a finished product soon.