As a former print journalism major, I have always felt less than well prepared to teach photography. Digital photography has helped, because I have been able to learn it as it has grown up.
But I never really feel like I have enough photography resources. Popular Photography magazine (popphoto.com) has a really great How To section with some cool tutorials, lists, helps and photoshop stuff.
I started off with this great list of 12 Photo Rules that are not in your standard “rule book” for photography. Great stuff like using the palm of your hand as a gray card.