As a website of the National Council of Teachers of Mathematics, all content on Calculation Nation^® is subject to the terms of use for any NCTM website.

We reserve the right to revise this Privacy Policy at any time by updating this posting without advance notice to you. Such revisions shall be effective to you immediately upon posting. We encourage you to check this Privacy Policy and Terms of Service Agreement for updates.

We are committed to protecting users’ privacy. Keeping the personal information you share with us on the site secure and ensuring your understanding of how we collect, use, disclose and maintain your personal information is important to us. We maintain reasonable physical, electronic and procedural safeguards to protect your personal information, and while no data transmission over the Internet is 100% secure from intrusion, we have used and will continue to employ reasonable efforts to ensure the protection of your personal information.

When you register for a Calculation Nation^® account, we ask for a limited amount of personal information (such as your email address and an account password). Because this website is intended primarily for school-aged children, we do not ask for names or addresses. We strongly encourage you to use a screen name that does not reveal any information about your identity or location.

The information that you provide will be used to keep track of your progress within Calculation Nation^®, such as updating your passport and ranking level.

Occasionally, we may use your email address to provide you with information about new games or features that are added to the site, but it will never be used for third-party advertisements or promotions. It will never be shared or sold to any company or organization, for any reason.

If you have any questions about this Privacy Policy, please feel free to email us or write to us at:

Calculation Nation^®
c/o National Council of Teachers of Mathematics
1906 Association Drive
Reston, VA 20191