This activity is perfect to use after introducing the two genres of fiction and nonfiction. In my classroom, I read books of both genres and we notice the differences and make a chart: Fiction - make believe, cartoons, etc. Nonfiction - real, facts, photos, etc. This activity is a great way to hit common core opinion writing and get students noticing what kinds of books they like and should look for. These are super cute to hang in your classroom library!