A complete leveled textbook and workbook for Grade 6 science, with 51 lessons in 8 units: The Nature of Science; Engineering Design; Atoms and Elements; Matter and Mixtures; Changes in Matter; Energy; Forces and Motion; Cells and Body Systems. 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, 298 pages.