Teach your 3rd graders the basic principles of ecosystems, plants, matter, electricity, magnets, the earth's surface, the solar system, the nervous & musculoskeletal systems, health, and more. Full-color, write-in pages show large photographs and highlighted key terms that showcase concepts and systems; students make their own booklets by answering questions and completing exercises that are integrated into the explanatory text. A review and a journal entry completes each chapter. 4 units (Life Science, Physical Science, Earth & Space Science, and the Human Body) with 14 chapters included. 234 perforated pages, softcover; this is a consumable, non-reproducible text. 2nd Edition. Level 3.