After the slide lecture, the class made drawings in the cross-contour technique (ex. above). Notice that the contours arc across the front of the form and the outer contours or outline is implied.
Next the class made drawings exploring the continuous line technique. The line technique addresses the structure of the form. Notice the "accents" in Bonnie's drawing and specifically their placement. She has placed them in a zig-zag orientation addressing key areas where the contour lines turn in space around the form. This is important because it introduces diagonals into the composition which are more dynamic that vertical and horizontals.
Luke's drawing employs the scribble technique. The drawing above exhibits mass and light as well as texture.
Gabriel's drawing illustrates the mass technique. Mass captures the weight and volume of a form as well as the light. Notice the variations in tonality and the placement of similar values in the darker patches.
David's drawing illustrates the mass and line technique combined. Again, the line brings structure where mass adds form and light. Notice how he has balanced the dark and light areas diagonally across the composition.