Make a competition out of some of the skills, the winner to get a PADI sticker, or some other such "rare" item. See if you can't make a game out of the various skills, or use a game to incorporate a skill or two. If pool sessions are to be a part of the class. Break the class up with some underwater games or competition.

Do not be afraid to incorporate more information and skill sets than what is the bare minimum. Let them get a good class with good information and extra skills that are important for a good price.

Better yet, charge more money and tell them, and give them more than they would from another Instructor!