Start with a simple circle or oval for the cranium
Add a smaller shape below for the jaw
Draw a center line to keep the skull symmetrical
Mark the brow ridge across the upper face
Place the eye sockets as large rounded or angular hollows
Add the nasal cavity as an inverted heart or triangle shape
Sketch the cheekbones extending from the eye sockets
Draw the upper and lower teeth as a row of small blocks
Shape the jawline and chin
Refine the skull outline and proportions
Add cracks, shadows, and contours if desired
Erase construction lines
Darken the final lines