Stress that this is a sketch, not a final drawing, so you want to draw quickly and hold pencils or pens loosely. With the yardstick or a strip of paper or cardboard, have students measure the model's head. Draw a stack of head ovals to the side of the figure to show final height. Draw a small overlapping circle. Explain that you need a new oval for each joint or place they bend.
Shoulders come next.
They can go behind the model then rest their heads on each shoulder. Draw the shoulder oval. Have students figure out that the you can fold the model in half-that hips are halfway down. Count down halfway down the stack of heads. The middle of hip circle should be halfway down.