Complete 20 portrait drawings using the full 8 Step Method. 

1. Shape of the Skull: Focus on the skull's gesture, its tilt, and two-dimensional axes.
2. Jaw and Cross: Establish the jawline and cross-sections, combining the center line with the brow.
3. Perspective: Find perspective by observing the relationship between the brow and the ear.
4. Proportions: Discuss and mark the proportions, noting halves and thirds from the brow to the chin.
5. Side Plane: Explore the side plane of the head, incorporating elements like the ear and jaw.
6. Eye Sockets: Introduce the eye sockets with a basic "planar visor" before progressing to a more detailed three-tiered plane.
7. Nose Development: Develop the nose from the keystone to the tip, and then from the tip to the base.
8. Chin and Denture Sphere: Focus on the large, rhythmic shapes of the chin and the area around the denture sphere.

Half of these should build upon previous work and the other half should start from scratch using the reference images provided in the downloads tab.

Each drawing should ideally be completed in a 10-minute timeframe, although extending to 15 minutes is acceptable.