URL details: www.salticid.com/concentration.htm
URL title:
Free Number Table Concentration Grid Game
URL paragraphs:
as recommended in chapter 7 of The Non-Runner's Marathon Trainer by Whitsett, Dolgener, and Kole. I spent way too much time writing this back in 2004 (I didn't know Javascript), so I'd love to hear from anyone who uses this! View source to see the scrip
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