Discussion:  Icicle Game tool 
Topic:  vertical measuring 
Related Item:  http://mathforum.org/mathtools/tool/211683/ 
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Subject:  RE: vertical measuring 
Author:  Howard58 
Date:  Nov 14 2013 
> I do not profess to know much about child development, there could
> be an issue with vertical measures when the concepts of negative
> numbers are introduced, specifically something like temperature and
> tides.
Traditionally (I guess), on a vertical scale with positive
> and negative numbers, the absolute value of the positive side of the
> scale increase as they go 'up'. The absolute value of negative
> numbers decreases as they go 'up'.
3
2
1
0
1
2
3
I
> do not have any particular suggestions other than if the 'ruler' had
> the numbers turned in respect to the axis of the ruler, (i.e.. a
> 'regular ruler' turned sideways) it might provide an alternative.
If you introduce negative numbers as a (or the) way to deal with measurement of
temperature, height above sea level, etc (there are not many simple ones) then
99.9% of problems with negative numbers go away!
 
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