This book explains everything about the science that goes into all the fun things on the playground! How does a kite fly? Why does a seesaw go up and down? These questions and more are answered with diagrams, detailed explanations, and colorful photographs. This title includes a glossary and an index as well as discussion questions to aid in reading comprehension.Grade: 3Subject: Physical ScienceGenre: Informational TextComprehension Skill/Strategy: Identify Cause and EffectDiagnostic Reading Assessment (DRA/EDL): 34/38Guided Reading Level: OLexile Level: 620LDK'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.