Are you playing good old-fashioned rubber bridge (no weird conventions, simple value-bidding)? Or are you trying to teach newbies modern duplicate bridge? The latter is probably destined for disaster unless they're already theoretical computer scientists :-/The canonical (U.S.) resource is, of course the ACBL. They're focused on duplicate bridge, with a nationwide network of clubs, tournaments, points and rankings, and so forth. It's probably too much infrastructure for a simple friendly game, but I feel like I have to mention them.For just the basics, you might try some of the resources here. I don't know anything about them, but a quick scan doesn't reveal anything obviously stupid :-)A Google search for "learn rubber bridge" will give you both of the links above and a lot more. When asking basic questions, always remember, Google Is Your Friend.