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* [https://download.nap.edu/catalog.php?record_id=13165#orgs A Framework for K-12 Science Education]: Practices, Crosscutting Concepts, and Core Ideas
* [https://download.nap.edu/catalog.php?record_id=13165#orgs A Framework for K-12 Science Education]: Practices, Crosscutting Concepts, and Core Ideas
* [http://wikieducator.org/User:Vtaylor/Sugar_3 Grade 3 Science & Math]