## Principles and standards for school mathematics, Volume 1This volume updates the messages of NCTM's previous "Standards" and shows how students' learning should grow accross four grade bands: pre-K-2, 3-5, 6-8, and 9-12. It incorporates a clear set of principles and an increased focus on how students' knowledge grows, as shown by recent research. It also includes ways to incorporate the use of technology to make mathematics instruction relevant and effective in a technological world. |

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