A teen boy shows up late for a date with his girlfriend.
I tell them that I want to see an emphasis on good clear poses stressing line of action that would also read well in silhouette. I want them to devise entertaining expressions and body language that show what the characters are feeling, all of which should result in a clear visual statement in a single drawing that communicates to the viewer what's going on in the scene. And they have about 20 - 25 minutes to do it before I collect them up and then show them all on the overhead projector in a quick, lighthearted critique.
Since I can't let my students have all the fun, I also draw out the scenario myself during the same timeframe. Here are a couple of different possible approaches I came up with:


In both drawings, I also took a number of quick glances toward my students who were busily producing their own variations, taking note of clothing, hairstyles and facial types that I could incorporate into my sketches. This is something I explained to them afterward, suggesting that they too should develop the good habit of taking visual notes in their sketchbooks on all that they see around them. Building up a reference library of character types, face shapes, fashion, etc, etc., will always result in much richer character designs in future assignments!