Powerpoint presentations developed to teach Gospel Doctrine lessons on the Old Testament.  There are more slides in each presentation than are used to teach a single lessson.  I use them as notes while preparing the lesson and when I teach I have the presentation in presenter view so that I can jump to the slide needed as discussion moves in that direction.  It gives me flexibility to pull up quotes that are appropriate to enhance the discussion and when I teach or study the lesson again I have the notes necessary to focus on a different aspect of the lesson