A complete leveled textbook and workbook for Grade 7 science, with 50 lessons in 8 units: Science Skills; Cells; Body Systems: Transport and Energy; Body Systems: Support and Control; Genetics and Heredity; DNA, Mutations, and Reproduction; Energy in Ecosystems; Ecosystem Interactions and Cycles. Every lesson teaches the skill with a worked example, then gives practice at three levels: Take Off (with hints), Glide (on your own) and Soar (challenge). Extend and Challenge tasks apply each skill to real problems and push deeper thinking. Each lesson is labeled with the standard it practices (Next Generation Science Standards (NGSS)). The complete answer key is included at the back of the book. Full-color coil-bound book that lies flat for writing, 8.5 x 11 in, 296 pages.