I am extremely fortunate to be in Judy Coates Perez's new online Color Theory class. I won't show you the whole exercise so as to preserve what I paid for and to not give Judy's work away, but I am having a buch of fun learning. It's my first online art class.
I am also in a group studying the chapters from the Art Quilt Workbook by Jane Davila and Elin Waterston. I finished my chapter 1 exercises a bit late, but they will have to do.