Chicka Chicka Boom Boom is a book I would use in a preschool classroom or either a kindergarten classroom. The book is about the lowercase letters all climb up a tree and the tree ends up breaking! Oh, no! So, each capital letter that matches the lowercase letter must come to the tree to find them. Each lowercase letter is left with some kind of injury. I would use this book in my classroom to show the kindergartners that there is always an uppercase letter that matches a lowercase letter. I would have the students be a letter and when I say that letter in the book, the students would have to mock the movement I said, pretending to climb up the tree. It would be the same for when the letters all fall out of the tree and walk away with some kind of injury. This book is a Lexile level of 530L.