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