This is a repost from March for educational purposes with some pictures added here.
In the end of 2008 I had the chance to teach Japanese puzzles in my own school. Now my story has been published on Conceptis website :) I hope this gives ideas to other mathematics teachers as well. Some puzzles in the middle of normal work is refreshing and teaches logic reasoning. Logic is the foundation where mathematical thinking is built. I hope you enjoy the story.
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