[Blindmath] suggestions for accessible 3d graphing paper giids

[Rasmussen, Lloyd]

I'm not sure that the problem is being well described.  Perhaps we are talking about isometric or perspective projections of solids.  I didn't look at the web site you cited.  I tend to think of solid surfaces, such as hyperbolic paraboloids, or conic sections.  Remember that the first person to prove that you could evert a sphere (turn it inside out without breaking anything) was a totally blind French mathematician.

Lloyd Rasmussen, Senior Project Engineer
National Library Service for the Blind and Physically Handicapped
Library of Congress   202-707-0535
http://www.loc.gov/nls
The preceding opinions are my own and do not necessarily reflect those of the Library of Congress, NLS.



-----Original Message-----
From: Blindmath [mailto:blindmath-bounces at nfbnet.org] On Behalf Of Bente Casile
Sent: Friday, November 22, 2013 9:33 AM
To: 'Blind Math list for those interested in mathematics'
Subject: Re: [Blindmath] suggestions for accessible 3d graphing paper giids

For 3-D graphing you need an x, y, and z axis so I don't think you will find what we would call accessible because the z axis is technically rising up in the air from the origin.  He will be creating graphs that look like they are floating in the quadrant based on their coordinates. The best you may be able to do is to put different colors on each axis x,y, and z with colored sharpies to help him as he follows the coordinates given in the problem. If he has trouble understanding the concepts you can re-create the quadrants by using index cards so he can conceptualize the change in the quadrant system.
I did this years ago by putting slits halfway through index cards and then we put them together so we could see the 8 pockets of space that now existed because of the addition of the z axis.  Hope this helps.

Bente Casile
-----Original Message-----
From: Blindmath [mailto:blindmath-bounces at nfbnet.org] On Behalf Of Mary Woodyard
Sent: Friday, November 22, 2013 4:59 AM
To: blindmath at nfbnet.org
Subject: [Blindmath] suggestions for accessible 3d graphing paper giids

My son will be starting a 3d graphing unit that is fairly short (2 weeks) in about a week.  He spent some time searching online with his Math tutor for 3d Graphing paper and this is the graph paper that they found that worked the best for his vision from what they were able to find in free 3d graph paper options.  Does anyone know of a more accessible free (or low cost) option?  

Thanks,

Mary Woodyard
Parent, 17 year old visually impaired student