How to draw a human skull

I start drawing a human skull because I believe that it will help to understand how to ta realistic face. Moreover, this is a good and

interesting practice.  I figured out that there are plenty of ways how to draw a skull and that every artist has his own method.

For example, my first and most favorite way to draw skull was shown next to a number one on the picture. However, after I discovered

that I could draw at first everything with simple geometric figures ( nr. 3 and 4). It is amazing because for me it is much more easier to understand the right proportions this way.