Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.

Committee on Conceptual Framework for the New K-12 Science Education Standards, and National Research Council. Framework for K-12 Science Education : Practices, Crosscutting Concepts, and Core Ideas. Washington, US: National Academies Press, 2012. ProQuest ebrary. Web. 14 May 2016.Copyright © 2012. National Academies Press. All rights reserved.