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I am aware that measuring tools have been used by many museums as a  
part of different math related exhibits. Are there any rules of thumb  
that I can apply to a set of new exhibits the Exploratorium is  
currently prototyping?

For example:
Wooden rulers break
Measuring tape works better than a ruler
Visitors don't know where to start the measurement so the start-point  
needs to be very obvious
etc

Thanks for any hints and lessons learned.

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______________

Nina Hido
Visitor Research and Evaluation
Exploratorium
3601 Lyon Street
San Francisco, CA 94123
(voice) 415-674-2872
(fax) 415-561-0370
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