One option I've discovered is to work on a drawing or painting during school. I snag a few minutes here and there, usually in the form of demonstration. As a student, I always learned a great deal by observing other artists. Therefore, I hope my students will gain a little more by watching me.
Here is a charcoal drawing I started the other day for my illustration class.

I'll try to add updates as I continue to work on the drawing. It still has a long way to go.