RE: pinhole stoichiometry

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From: Marc Crown (mcrown@gwhs.org)
Date: Sun Mar 07 2004 - 10:50:49 PST 

Date: Sun,  7 Mar 2004 10:50:49 -0800
Message-Id: <200403071050.AA2137588046@mail.gwhs.org>
From: "Marc Crown" <mcrown@gwhs.org>
Subject: RE: pinhole stoichiometry

Hi Geoff.
I started this year with a small unit on dimensional analysis where I used
dominoes as a manipulative. It wasn't till I finished stoic that I realized I could
have applied the same concept there. I'm planning to make some cards for
next year that are like dominoes but are stoic related. For example, stoic
coefficient ratio cards that can be flipped over to invert the ratio. i.e 2/1 on
front, 1/2 on back. And, molar mass cards from some common componds. I
can then assign problems and have the kids play a domino like game to solve
the problem.

What I'm hoping is that they will see that stoic probs are merely a game of
inverting known ratios.

marc

---------- Original Message ----------------------------------
From: Geoff Ruth <gruth@leadershiphigh.org>
Reply-To: "Pinhole Listserv" <pinhole@exploratorium.edu>
Date: Sun, 7 Mar 2004 09:42:17 -0800

>Does anyone have any manipulatives or models that they use to teach
>stoichiometry? I've used ingredients in a recipe as a way to try to
>teach it, but students choke badly when they have to do more
>abstract, symbolic stoichiometry.
>
>Help?
>
>-- Geoff
>
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