[Pibe-division] Fwd: [AERNet] Math- Proportions Cross Multiplying

Thu Feb 2 18:26:47 UTC 2012

this is a great suggestion from a very resourceful lady.

____________________________________
 From: brltrans at frontier.com
To: russellli00 at staff.nctschools.org,  AERNet at lists.aerbvi.org
Sent: 2/2/2012 11:41:34 A.M. Central Standard  Time
Subj: Re: [AERNet] Math- Proportions Cross Multiplying

I created a tool for my students who read braille. I took a manila  folder. 
I got 4 library pockets from our school librarian (they look like  
rectangles where you can insert a card to sign out the book... olden years). I  
affixed 2 pockets vertically one above the other on the left side of the  inside 
of the folder, and I affixed 2 pockets vertically one above the other  on 
the right side of the inside of the folder. I used graphic tape to create  
horizontal separating lines between the top pocket and the bottom pocket on  
each side. 

I then took a handful of 3 by 5 index cards (could also cut and recycle  
leftover braille paper as well) and brailled numbers at the top of each card  
(and at the bottom as well, so I could get 2 different numbers or variables  
out of each card by flipping the card top to bottom). I then inserted the 
card  with the number needed into each appropriate pocket for my student to 
work out  the problem. 

Perhaps creating such a tool might help your student understand the  
concepts of numerator and denominator, and how to cross multiply. 

I also made a similar  folder for multiplying polynomials for my HS  kids 
... but I affixed the 4 pockets horizontally (2 on each side of the  inside 
of the manila folder) and labeled them First, Outer, Inner, and Last  for the 
FOIL method of multiplying. My student would find the 2 firsts.. one  from 
the left side of the folder and one from the right side of the folder and  
multiply them. Then he would find the 2 outers... the 2 inners... and the 2  
lasts. He used a brailler to record and work out his problems, and he then  
combined like terms to get the answer. 

It’s sorta hard to describe these in words... I’d be glad to answer any  
questions, though.
Sheila

From: _Linda Russell_ (mailto:russellli00 at staff.nctschools.org)  
Sent: Thursday, February 02, 2012 10:10 AM
To: _AERNet at lists.aerbvi.org_ (mailto:AERNet at lists.aerbvi.org)  
Subject: [AERNet] Math- Proportions Cross  Multiplying

I  have a sixth grade braille reader who is learning about proportions and 
the  teacher is using the term cross-multiplying.
Most of the work we have done  is using linear fractions, and she knows the 
first number is a numerator and  the second number is the denominator.We 
have taught her that when they talk  about cross multiplying we have taught 
her that she uses the first numerator  and the second denominator.  
Her aide thinks that this is confusing  her, and thinks that if she does 
the problem spatially it will be less  confusing for her. Since she has little 
experience with spatial fractions, I  am not sure this will help. I think 
it is just that it is a two step problem  and she doesn't like to do more 
than one step.

Any input from anyone  with experience in this area? 

-- 
Linda Russell
Intervention  Specialist
Newcomerstown Exempted Village  Schools
740-498-4151 ex:3207

You have  two hands. One to help yourself, the second to help others

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