National Council of Teachers of Mathematics (NCTM) Partners with Nextoy, llc. Daily Interactive KenKen Puzzles Now Appearing on Illuminations Website

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The NCTM, the world's largest organization dedicated to math education, and the popular math game and logic puzzle KenKen are partnering in the goal of making math learning fun.

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Will Shortz, NY Times puzzle editor says "KenKen is the most addictive puzzle since sudoku"!

KenKen® Puzzle, the internationally popular math and logic puzzle, is proud to announce an agreement with the National Council of Teachers of Mathematics (NCTM), the world’s largest organization dedicated to math education. Four daily KenKen puzzles will now be featured on NCTM’s Illuminations website ( Illuminations provides standards-based resources that improve the teaching and learning of mathematics for all students. KenKen is highlighted alongside other classroom-tested math games, puzzles, lessons, and activities on the Illuminations site.

“We call KenKen the puzzle that makes you smarter, but more than that, it makes math fun,” said Robert Fuhrer, president of the KenKen Puzzle Co. “KenKen was created for the classroom, so we couldn’t be happier that a wonderful organization like NCTM is helping to bring the puzzle into more U.S. classrooms than ever before.” KenKen—the name based on the Japanese word ken, meaning “wisdom”—was developed in 2004 by acclaimed Japanese math educator Tetsuya Miyamoto. His goal was to create a puzzle to improve his students’ math and logic skills. Miyamoto wanted to encourage independent thinking, emphasizing trial and error, concentration, and perseverance.

The result: A grid puzzle reminiscent at first glance of Sudoku, but actually requiring basic mathematic calculations. KenKen soon spawned a wildly popular series of books in Japan. In 2008, Nextoy LLC brought KenKen to the United States. It quickly became the first daily feature since the crossword puzzle to appear in the New York Times. In addition to now appearing in more than 100 prominent U.S. publications (from Scholastic classroom magazines to the AARP Bulletin), KenKen can also be found in books for players of every skill level, mobile versions for iPad and iPhone, and the popular website And KenKen has never strayed from its educational roots, with the U.S. company launching the KenKen Classroom Program. This weekly service provides free puzzles to teachers across the country. This mission continues with KenKen’s exciting new partnership with NCTM and Illuminations.

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Nikki Sato

Robert Fuhrer
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