sthomas1 at gosargon.com
Wed Oct 27 10:05:18 EDT 2010
The Physical rods are best, but here is a set of virtual rods with direction
arrows <http://www.squeakland.org/showcase/project.jsp?id=10356> with the
ability to change the transparency of all the rods on your playfield in
Etoys (to see how its done, just get the hale for a particular buttion and
from the menu click on "open underlying scriptor"
Actually it would be fairly easy to have kids create thcleir own sets of
Virtual rods in Etoys using polygons (hint: shift click on a polygon to get
its handles). The playfields in the project referenced here can be used you
could have the kids drag out their own playfield then from the menu select
"playfield options ..." and select "grid visible when gridding" and "use
gridding". Then from the same menu select "set grid spacing ..."
On Wed, Oct 27, 2010 at 8:28 AM, Alan Kay <alan.nemo at yahoo.com> wrote:
> 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.
> *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<http://www.squeakland.org/showcase/project.jsp?id=10355> and
> Fraction Tools <http://www.squeakland.org/showcase/project.jsp?id=9442> 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.
> IAEP -- It's An Education Project (not a laptop project!)
> IAEP at lists.sugarlabs.org
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