[blindkid] Questions about rulers and perpetual calendars

[Steve Jacobson]

I think that I saw a ruler on the American Printing House site that had divisions every half centimeter, which is just a little wider than an eighth of an inch.  
Since a half a centimeter is five milometers, it is a little arder to know what could be estimated.  I didn't do a thorough search, though, and one might check 
some of the other sites that have specialized products.  Perhaps the Royal National Institute for the Blind in the United Kingdom might have additional rulers, 
and I believe they sell to North America now.  

Best regards,

Steve Jacobson
  

On Tue, 2 Nov 2010 18:19:52 +0000, rholloway at gopbc.org wrote:

>Steve, 

>The half-way estimate makes a lot of sense. What about metric units? (What is typical?) Clearly one could go smaller than cm with metric rulers. How do 
you measure / estimate down to mm?
>Sent on the Sprint® Now Network from my BlackBerry®

>-----Original Message-----
>From: "Steve Jacobson" <steve.jacobson at visi.com>
>Sender: blindkid-bounces at nfbnet.org
>Date: Tue, 02 Nov 2010 13:02:25 
>To: NFBnet Blind Kid Mailing List,\(for parents of blind children\)<blindkid at nfbnet.org>
>Reply-To: "NFBnet Blind Kid Mailing List,
>	\(for parents of blind children\)" <blindkid at nfbnet.org>
>Subject: Re: [blindkid] Questions about rulers and perpetual calendars

>Hi,

>Check out the rulers that the American Printing House for the blind has at 

>http://www.aph.org

>as one of them does have markings for 1/8-inch measurements.  Most of us learn that 1/16 inch is exactly half way between the 1/8-inch markings and ca 
>do pretty well without having a specific 1/16-inch marking.  For example, half way between the 3/8-inch point and the 1/2-inch point is 7/16.  To some 
>degree, this is actually easier than trying to count 1/16-inch lines.  I believe that some of the metal tape rulers have either 1/16 markings on the first few 
>inches or have a short ruler attached with such markings.  

>Could you explain what a perpetual calendar is?

>Best regards,

>Steve Jacobson

>On Tue, 02 Nov 2010 10:37:25 -0400, Wendy Molle wrote:

>>Hi!
>>    As part of our 4th grade math curriculum, our students need to use rulers that go down to 16ths of an inch AND perpetual calendars.  Does anyone 
>know where we can locate Braille versions of these? 
>>     We and our TVI have not been able to find anything.  We tried to make a ruler, but with no success.  When we tried to type in the perpetual calendar 
>to emboss it, it got all garbled and unusable.  Although I am sure it could be sorted out, it would be very time-consuming.  We are hoping that someone 
>knows where we can purchase one.
>>Thanks for your help!
>>Wendy Molle
>>Schoharie Elementary
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