This is an instructional video showing step-by-step how to draw a face (male and female), using scale and proportion, shapes and forms.
Part 2 illustrates how we begin using shapes and by adding shading we create the illusion of forms. After laying out the quadrants of the face in Part 1, we begin by drawing the eyes and eyebrows in position on the face by using a pencil, paper, erasor and a smudge tool(or piece of paper towel).
This video illustrates how to draw the eyes, using form and shading.
Source: Classroom instruction