The Missing Half

A great way to practice drawing is to take a picture of a person (a magazine or an old picture will do fine) close up and cut it in two.  Paste half of the picture on a piece of white drawing paper and draw the missing half.  Another idea (to make it simpler) is to take pictures from a coloring book.  See how close you can make your drawing  to the original without looking.   Make another where the pencil drawing is outrageous or silly.  Trade pictures with somebody.   You do the top half and they draw the bottom half.  Another take on this idea would be to have you and a friend each take opposite halves of the same picture.  After drawing, pair your pictures together.  How close are they to the original?  What other ideas have you come up with using the basic idea of ‘the missing half’?