[Blindmath] graphics: need help

[Sean Tikkun]

I recently adapted a geometry lesson for an 8th grader.  I was frustrated with protractor measurements and the teachers demand that it be done.  I in turn referenced the state standards and found most national standards make use of comparison and relative size, such as acute, right or obtuse.  I produced a set of drafting triangles our of matte board... When we are talking real world use the drafting triangle is about the most effective and common tool when using geometry.  

In terms of crisp, we make use of binding tape in very this slivers that we bend gently around objects.  It's thick but still pretty malleable if you are careful.

BTW, you know you can braille right on the tactile drawing kit right?  Video below requires quicktime.

http://web.me.com/jaquis/Through_Seans_Eyes/TVI_solutions/Entries/2009/9/16_ocean_view_scenery.html


Sean Tikkun
Teacher of the Visually Impaired 
LaFollette High School
srtikkun at madison.k12.wi.us

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On Apr 15, 2011, at 8:00 AM, Maureen Lewicki wrote:

> Good day! I am a teacher of the visually impaired, with a fourth grade braille student. We have been doing introductory geometry, such as labeling isoseles triangles, right triangles, polygons, etc.
> 
> The graphics are being produced by computer, by an aide who is really adept with computers, and if she doesn't know how to do something, she'll figure it out.
> 
> She has produced some impressive geometry graphics! We have also had to 'tweak' quite a bit, such as with, for example a graphic of a ray. The student could not, understandably, detect the arrow at the end if it was the same thickness as the line, so the transcriber draws the line, then at the end, a very thin line with an arrow. 
> 
> Finally, to the question: Some of the graphics remain difficult for the child. During a recent test, I ended up constructing the diagrams on the Graphic Aid for Mathematics and the draftsman tactile drawing board by APH,(my preferred) which were more understandable to her. Can anyone suggest ways to produce really crisp, clear figures? We will soon be measuring circles, and angle within the circles, etc, so I want to try to produce the best for the child, without frustrating the transcriber. Thank you!M
> 
> 
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