I had given this presentation about 5 or 6 times over the last few years. It has been really popular since "everyone loves a mystery story." This presentation has no notes,; I had never used notes before, but the slides are very clear on what I was talking about, and it is also easy to follow along. There may be a slide or two with very few words, but the presentation is complete. I think it would make an excellent presentation in your classroom and it can also be easily modified.