1. The first thing you should do when drawing a skull is to draw a circle. This size of the circle should be big enough to accommodate other things you are going to include inside it.
2. Draw a straight vertical line and horizontal in such a way that they divide the circle into four different parts.
3. Directly under the horizontal line, draw two hexagons to represent the two eye sockets. Connect the two eye sockets with a short horizontal line.
4. Directly on the vertical line and below the two hexagons you drew in step 3, draw a short horizontal line to represent the base of the nasal cavity and place two vertical lines at its two ends so that they meet at the top directly under the space in between the two eyes; you should get a structure that looks like a small triangle.
5. Sketch the angular outline to represent the middle of the skull, and its sides.
6. Draw a horizontal line at the bottom of the circle to represent the upper teeth.
7. Sketch the jaw to cover the upper teeth, after which you can include the lower teeth.