For grades 5-9. Each book in this series is designed to build upon a specific topic in science by providing 12 detailed full-color transparencies for instruction and group discussion, with corresponding blackline reproducible pages. Authored by a leading science educator and former president of the National Science Teacher's Association, these materials are excellent for supplimenting textbooks and enriching classroom science experiences. These books each contain full-color overhead transparencies, blackline photocopy masters, and a comprehensive teacher's guide. Review material included where indicated.