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Topic: Re: cross sectional pictures
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Lari Garrison

Posts: 6
Registered: 12/6/04
Re: cross sectional pictures
Posted: Feb 1, 1998 5:05 PM
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I learned this great trick from another calculus teacher, she suggested
buying those paper wedding bells that are made of tissue paper. If you
think about it they are made of two cardboard pieces and a *honeycomb* of
paper, which when is spun about and the two cardboard pieces joined they
make a bell. If you buy bells which are large enough you can cut them into
more helpful shapes. I have cut a rectangle form, which generates a
cylinder, a 1/4 circle, which generates a hemisphere, and a few other ones.
Usually, after seeing a few of these the kids begin to understand what is
going on, and they begin visualizing them without the crutch. Hope this
helps. If you have any questions about what I mean email me.

Lari Garrison
mathematics teacher
Warren Township High School

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