With themes ranging from aliens to fossil hunters to pirates, these titles add adventure to the process of learning about the water cycle, the rock cycle, weather, and Earth’s physical processes and resources. Raintree Fusion is high-interest nonfiction aligned with curriculum, at a reading level accessible to struggling readers. It uses engaging photographs and illustrations. Background knowledge of subject matter is also incorporated into the text. All vocabulary is defined at point of use. Each title has a clean, clear design that supports readability along with clear, predictable text structures.