References
- Blake, Jr., R.W., J.A. Frederick, S. Haines, and S.C. Lee. 2010. Inside-out: Environmental science in the classroom and the field, grades 3–8. Arlington, VA: NSTA Press.
- National Governors Association Center for Best Practices and Council of Chief State School Officers. NGAC and CCSSO. Common core state standards. Washington, DC: NGAC and CCSSO.
- NGSS Lead States. 2013. Next Generation Science Standards: For states, by states. Washington, DC: National Academies Press.