Have the students bring in a picture of themselves. Enlarge them on a photo
Use tracing paper to outline the different values, these can be erased and
altered to give the student a range of decisions. Start with an overall
picture on drawing paper and then cut out the areas for the shades and
highlights. Cut the paper and place the other layers underneath. Go from
the largest area including more than one value and work towards the smaller
sections. Each layer can be raised with tabs to show a space between colors.