These nonfiction books help beginning readers learn about the world while supporting them with decodable text. Controlled vocabulary is based on phonics skills and high-frequency words that have already been taught in this cumulative, systematic series. Young readers will build confidence and fluency as they sound out words while expanding their knowledge of key science, social studies, and math topics. Each book offers tips for teachers and caregivers along with additional information at the end to build the reader's background knowledge of the topic. Downloadable Teacher Notes available.