These weren't created to take the place of the teachers guide, rather, afford the students a visual representation of the content in each unit and an introduction to most of the games. There are 66 slides for Unit 9. As you progress through the year you'll notice the slides become a bit more interactive as you go. I tried to use a lot of color and animation affects, I found that keeps the kids focused and engaged. This completes the entire Everyday Mathematics series for first grade. I hope you enjoy using them as much as I have!