This book covers everything you need to know about human and animal skeletons. Diagrams and photographs bring the subject to life, while a glossary, an index, and discussion questions aid in reading comprehension. Grade: 4 Subject: Life Science Genre: Informational Text Comprehension Skill/Strategy: Compare and Contrast Diagnostic Reading Assessment (DRA/EDL): 40 Guided Reading Level: R Lexile Level: 770L DK's iOpeners equip K-6 students with the skills and strategies they need to access and comprehend nonfiction so that they are not only learning to read but reading to learn. The combination of high-interest content and eye-popping photography of iOpeners brings science and social studies topics to life, raises student achievement in reading, and boosts standardized test scores.