I created a tool for kids to help them with the most confusing concept- negative numbers- that they face. Even my 11th grade students stumble on negative numbers more often than not. When you stumble, you’re not having fun, and when you’re not having fun, you’re likely to go find something else to do. I want kids to feel successful.

I hope you check out my blog, and my tool, at http://zerosumruler.wordpress.com . I’d love your feedback.

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]]>Also, the puzzle can be investigated using mathematics, in particular combinatorics and permutation group theory: http://en.wikipedia.org/wiki/Mathematics_of_Sudoku

But the most important is, as I said before, that this kind of games and puzzles improve mental performance and problem solving capabilities.

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