This book is an electronic flip book, which means each page is set up like a movie frame. You need to scroll it at a steady pace to see the animation. Students go back in time 65 million years to just before the time of the dinosaurs’ extinction. They learn interesting facts about dinosaurs and pterodactyls, and view the comet that, according to scientists’ theories, caused these creatures to become extinct. They also are presented with math calculations regarding the sizes of the dinosaurs and the time between then and now. The step-by-step solutions to the math questions are shown afterwards so students can check their work. Vocabulary words are highlighted red with links to their definitions. The flip book format provides a fun visual and kinesthetic approach to learning!