Each slide has a different topic and several pictures that depict that topic. The student clicks on the picture and they are linked to a video, website, or game on that subject. some links are Youtube! So, if your school blocks Youtube, you could easily change those few hyperlinks to other websites.
Allowing students to explore these topics on line would build their background knowledge, so when you begin your instruction they can make meaningful connections.
You could also make this as assessment for learning piece by requiring that they keeping a learning log or answer certrain questions from each slide.