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About Us

Founded in 1920, the National Council of Teachers of Mathematics (NCTM) is the world's largest mathematics education organization. Interested in membership? Learn more about exclusive member benefits and discounts and join today.

As we celebrate NCTM’s 100th year, this NCTM 100 timeline reflects on the organization’s contributions and accomplishments, and places them in a broader historical, educational, and mathematical context.

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