Need a quick filler before the bell rings? Have your kids grab a sheet of paper (scratch paper will be great) and a pencil. Then strike a pose, and give them 15 or 30 seconds to draw you.
If you emphasize that you want to see complete figures, you eliminate their trying to draw an outline, which would be impossible in 15 seconds anyway. Strive for capturing the essence of movement, the angle of the body and the elimination of detail. This will help students to really “see” what is in front of them, and, I think, translates obliquely into better observation and communication skills.