Spectrum Geography: Regions of the U.S.A. for students in grade 4 strengthens geography skills by focusing on types of regions, canals and tributaries, natural and human events, map skills, and more. Spectrum Geography helps young learners improve and strengthen their geography skills like never before! Each book features easy-to-understand directions, full-color illustrations, maps, and perforated pages for easy removal. It is aligned to national and state standards and also includes a complete answer key. Students need to be equipped with the essential skills they need for school achievement and for success on proficiency tests. The Spectrum series has been designed to prepare students with these skills and to enhance student achievement. Developed by education experts, each title in the Spectrum workbook series offers grade-appropriate instruction and reinforcement in an effective sequence for learning success. Perfect for use at home or in school, and a favorite of parents, homeschoolers, and teachers worldwide, Spectrum is the learning partner students need for complete achievement.