eHow Page on Learning the Basics of Hockey – It's short, sweet, and to the point. If you don't know anything about the game, you might just learn something.
Mom's Guide to Hockey Lingo – Yes, this is a site called "Mom's Guide", but it provides a short glossary of common words used in hockey.
About.com Hockey Rules Page – The page boasts "Ice Hockey rules at a glance," and that is exactly what it does.
Penalty and Ref Signals – Explanation of most common penalties and referee signals.
Icing Wiki Page – Easiest understanding of icing you can find.
Offsides Wiki Page – Easiest explanation of offsides you will fully understand.