I love to teach classes. #1, find out what your boss wants you to teach? Does she have something specific in mind - a particular quilt? Or should you teach a class on trimming blocks or making bindings. If it's a beginning class, show the basics then give them some homework. If you're going to be at the store on subsequent days tell them they can stop in for questions. KISS is the motto. Keep it simple st----. Don't overload them with info unless they ask. If you're going to teach a certain pattern that requires a new ruler, make sure the store has them in stock at the time of the class. And on and on. There's more, but you get the point.