I've been running D&D for a friend's family lately, and the 12-year-old daughter wants to run some games for her friends. She's got the germ of a campaign idea (assemble three dragon-related artifacts), but wants to know how to design adventures. Of course I've said I'll work with her on this, but I'd like to point her to some good advice on the web as well. Can anyone recommend any blog posts, articles, or videos aimed at helping a brand-new GM design and/or run her first adventure?