Instruction for Earth's Changes NGSS Science Standards will never be the same again when your students become science sleuths and earn achievement badges!BOOM! Science Sleuths has arrived!Use Science Sleuths to teach NGSS Earth's Systems: Process that Shape Earth for second grade. Includes a complete integrated unit with teacher standard practices in the disciplinary core ideas, science and engineering practices, and crosscutting concepts. Other subject connections to ELA, Math, and Art are also