![Who is Chief Justice of the Supreme Court?](https://webarchive.library.unt.edu/web/20130219180114im_/http://www.free.ed.gov/images/resources/naturalization.jpg)
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![See caption below](https://webarchive.library.unt.edu/web/20130219180114im_/http://www.free.ed.gov/images/resources/figure.jpg)
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Figure This! offers interactive math problems families can use to help children understand estimation...
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![Image of a carved black horse](https://webarchive.library.unt.edu/web/20130219180114im_/http://www.free.ed.gov/images/resources/digging1.jpg)
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Digging for Answers offers interactive quizzes that draw interesting historical facts from the Smithsonian's...
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![Our dice game allows you to see how increasing or decreasing the number of dice rolls effects an outcome.](https://webarchive.library.unt.edu/web/20130219180114im_/http://www.free.ed.gov/images/resources/explore.jpg)
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Dare to Compare invites you to test your knowledge against students nationally and around the world...
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