Instructional Videos on Proko.com

I have just recently signed up to proko.com which for me has been a bit of a revelation. The website and videos are made by Stan Prokopenko, an artist and teacher. Proko is a resource for artists to get good art instruction videos, so far Stan has uploaded a selection all about how to draw the head and each important feature. The above video concentrates on the nose and it's structure, it might sound a bit dull but believe me they are very entertaining.