Web Design Beginner: folder structure and root directory

Here is a link to my Prezi on this subject http://prezi.com/n-6nvf-xce9d/?utm_campaign=share&utm_medium=copy&rc=ex0share
Howdy, I teach Web Page Design at Oklahoma City Community College. This is the first video in a larger lesson plan that I teach in my course. I have noticed that students have a difficult time understanding why file management and folder hierarchy is a big deal. So I decided to show a basic overview of what happens when you move CSS out of the web-site folder.

Music thanks to http://www.youtube.com/watch?v=8ZZdTtxE-10&list=EL2XiIeDK02dE