Instruction:
Draw 10 lines at various line weights (shades). Do the same thing with curved lines and shapes. Create a cross contour drawing of your hand, an object, and a crumpled up paper towel.
Purpose:
Practice pencil holding techniques and pressure application. Emphasis on shading and forced focus and practice on the shape of objects being cross contoured.
My Interpretation:
Cross contour is difficult but very helpful. See above.