Many links to Don on these pages are incorrect because he changed his website URL to www.mathman.biz
(you might see Don's old URL link: shout.net/~mathman, which doesn't work)
Links to Don could be under different categories, like: fractions, Mathman, Don Cohen, sample problems, calculus for young people, iteration, patterns in mathematics, Sheri finds the volume of a pyramid, cookie-sharing...
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Internet links to Don's website and references to his books from around the world!
Links from U.S. sites:
SDSU Web Resources for Teachers
Links from sites outside the US:
CANADA Hoagies gifted- products
References to Don's books: