[IAEP] Ideas

Alan Kay alan.nemo at yahoo.com
Wed Oct 27 08:28:08 EDT 2010

```Hi Folks,

We have used Cuisenaire rods a lot for all grades.

We always take magic markers and draw arrowheads on one end of the rods to give
a sense of direction to the magnitudes when used in operations.

Vectors are a very powerful way of thinking about numbers and quantity and this
is a great way to get them started with a measuring and magnitude idea that
generalizes to more dimensions.

After a while you can start to use slender dowels for 2D calculations, etc.

Etoys objects are actually vectors, and Etoys actually has a "hidden" vector
vocabulary for doing vector arithmetic in two dimensions.

Cheers,

Alan

________________________________
From: Steve Thomas <sthomas1 at gosargon.com>
To: Caroline Meeks <caroline at solutiongrove.com>
Cc: iaep at lists.sugarlabs.org; Patricia Curtis <patricia.curtis at gmail.com>
Sent: Tue, October 26, 2010 9:49:44 PM
Subject: Re: [IAEP] Ideas

On Thu, Oct 21, 2010 at 12:01 PM, Caroline Meeks <caroline at solutiongrove.com>
wrote:

I have had requests for a few things over the years.
>
>
>http://en.wikipedia.org/wiki/Cuisenaire_rods - these are popular
>math manipulative and an online version would be cool.
Here are some Cuisinaire Rods in Etoys (sorry Patricia, I am NOT trying to
discourage you, just support your request on what is needed)

Fraction Bars and Number Lines and  Fraction Tools both have Cuisenaire Rods
built into the projects. The rods can not only be used for activities shown in
the projects (and other activities and lesson plans), but also for kids to
journal/describe their understanding of fractions and units.

Stephen

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