Aperature, Shutter Speed, and ISO tutorial

There is an excellent video tutorial on Aperture, Shutter Speed, and ISO at the bottom of an article on Basic Composition for Photography at Photography.com.  The young man's physical appearance is not one that would spark the confidence of an old lady like me, but I try to be open minded about such things so I watched it.  In my opinion, despite the way he does his hair and the casual clothes he wears for a presentation, Evan's tutorial is one of the best I've seen or read on these topics and if you're confused about any of these 3 fundamental photography elements, just watch this short video from Evan and http://photoextremist.com/.