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Re: When math makes sense  w/ cooking, consruction
Posted:
May 27, 2013 12:33 PM


On Mon, 27 May 2013 08:38:53 0600, Richard Strausz <Richard.Strausz@farmington.k12.mi.us> wrote:
> And here is another Wayne. My students know the formulas for surface > area and volume, but they often make false assumptions. I like this: > > http://blog.mrmeyer.com/?p=14118 > > Richard >
We've been here before. We've discussed the pizza problem in much this way. (If one 10inch pizza will feed two people, how many 15inch pizzas will we need to feed nine couples?)
I don't think that false assumptions are the issue. The real problem is misunderstanding what volume is and how it's related to linear dimensions.
This, and similar activities, demonstrate very clearly that Wayne's strategy of *telling* doesn't get at the problem.
Just as it doesn't work to *tell* Wayne that what he advocates doesn't work. (No matter how strong the evidence.)
 Louis A. Talman Department of Mathematical and Computer Sciences Metropolitan State University of Denver
<http://rowdy.msudenver.edu/~talmanl>



