Introduce young readers to the fascinating cycle of life Using familiar, engaging animals, the books describe the stages of development, from the beginning life stages through the maturation of each animal. Since the books in this series are created using the same organizational structure, teachers can use the books together for comparing and contrasting exercises. This series explores and supports the standard The Living Environment: Diversity of Life and Heredity, as required by Benchmarks for Science Literacy: Project 2061. This series is leveled for early-intervention reading programs: Newly Fluent to Fluent Level.