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Topic:  Interesting, potentially useful 
Related Item:  http://mathforum.org/mathtools/tool/417/ 
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Subject:  Interesting, potentially useful 
Author:  mmckelve 
Date:  Mar 10 2004 
http://matti.usu.edu/nlvm/nav/frames_asid_189_g_4_t_2.html
This tool seems like it could be very useful for teaching multiplication. You
get a very real sense of the relationship between x and y and a couple of
multiplicative operations (squaring and multiplying, specifically) displayed on
a graph. I like how they provide the 1x1 block and the 5x1 block to help you
visualize with concrete numbers, instead of limiting you to the abstract symbols
"x" and "y." A useful extension would be to allow blocks of arbitrary
(userentered) width & height, but that's not really necessary; the 2 that
they provide are sufficient. Overall, this tool took a minute for me to warm up
to, because I didn't really grasp what the heck I was supposed to be doing with
it, but I eventually figured it out and enjoyed playing with it.
Michael

Posted for George Reese's C&I 336 Class, Spring 2004
http://www.mste.uiuc.edu/courses/ci336sp04
 
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