Drawing ribbons might not see the most expressive activity we could do in class, I know. Yet the amount of learning it can create is immense. Not only are you going to have to think through the subtleties of Value, and start noticing the Edge of the ribbon.
In your sketchbook I want you to practice a few times and then work up at least three tonal studies of various ribbons that I will have for you. Only one will be submitted for marking. Remember to use only ONE light source.