From Molecules to Organisms - Plants and Animals - Structures and Processes - Fourth Grade - NGSS Aligned This product is a complete teaching unit of 12 hands-on, engaging lessons to teach animal structures and functions fully aligned with the fourth-grade NGSS standards. Also included is a collaborative end-of-unit project that utilizes the NGSS Science and Engineering Practices to apply their knowledge to a fun engineering and design project. This unit covers: 4-PS4-2, 4-LS1-1, and 4-LS1-2. --