Date: May 27, 2013 11:50 PM
Author: Richard Strausz
Subject: Re: When math makes sense - w/ cooking, consruction

> If they really know the formulas, they would start by
> using the given
> information to compute the volumes based on the
> evidence
> presented. Beyond that, I'm not at all sure that the
> video is going
> to help people who jump to such irrational
> conclusions to keep from
> doing it next time. And the time after. Actually
> teaching students
> to compute the volumes before assuming anything,
> seems reasonable
> somehow even if teaching is out of style even on a
> listserve called
> "Math-Teach". Better would be to have them express -
> and then graph
> - - volume of resulting cylinders as a function of
> side length of
> rectangles of fixed area and find the maximum. Nice
> algebra and it
> greases the skids for eventual calculus. What a
> concept.
>
> Wayne
>

Your suggestion is good, too, Wayne. Thanks.

Richard


> At 07:38 AM 5/27/2013, Richard Strausz 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