Spectrum Science is sure to captivate students' interest with a variety of fascinating science information! The lessons, perfect for students in grade 3, strengthen science skills by focusing on the metric system, states of matter, photosynthesis, gravity and planetary motion, medicine, and more! Each book features easy-to-understand directions, full-color illustrations, photos, and lively passages. It is aligned to national and state standards, and also includes a complete answer key. --Today, more than ever, 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 experts in the field of education, 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.