Resources and Tools for Elementary Math Specialists and Teachers
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    • 4
      By Uncle Bob on 04/19/2012 - 11:25
    • Ken Ken is like Sudoku but is richer in math content and strategy. The simpler 4x4s will be challenging enough for your first go. Work up to the 6x6 with all four arith. ops. and you'll have a little brain warmer with new puzzles daily.