I am selling this because I no longer use it. You can study by subject. As shown in the photo, there is a mark on the back cover where a sticker was removed. This is a science study notebook for elementary school grades 4-6, covering the topic of energy. - Title: Energy - Target Grade Level: Elementary School Grades 4-6 - Series Name: Subject-Based Study Notebook: Science 2 - Number of Pages: 56 pages - Publisher: Miyazaki Education Publishing Thank you for looking.