Monochrome example I am working on for my color theory class. Gives me something to do when the students aren't needing assistance.
I guess I'm not TOO rusty. I admit to fudging some of the wrinkles because they are insane and my proportions were not 100%, but I also just eyeballed it. Grids allow for more precision, but I don't have much patience for them. That and I enjoy the opportunity for artistic interpretation.
So I get to polish my rusty skills slightly as I teach, especially since the classes are small at the moment (three students!).