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Q&A #1474


Introduction to odd and even numbers

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From: Gail (for Teacher2Teacher Service)
Date: Apr 25, 1999 at 14:28:13
Subject: Re: Introduction to odd and even numbers

I am a fifth grade teacher, but I have a friend who teaches younger students,
who introduces the concept this way.

She use an overhead projector, and makes models of the numbers from 1 - 10.
Each model is a set of squares arranged in two columns (or rows, depending on
how you hold them). (She makes these models from the plastic counted cross-
stitch templates, cutting them up into the models she needs. Placed on an
overhead they are small enough for many models to fit at one time, but large
enough to move around easily.) So a 2 would just be two squares side-by-side.
A 5 would be a row of 2 and a row of 3 side-by-side, and so on. She displays
these models, and asks her students what they notice about the models.

Students soon see that there are two groups of numbers, the ones with evenly
matched up rows (the even ones) and some that have an "odd" square and  do
not have a partner.

To drive this home, she tells her students that the numbers are going to have
parties, but only cetain numbers are invited to each party. The students have
to decide which numbers will go to the "odd" party, and which will go to
the "even" party.

Then students make some models of their own, drawing squares, or coloring in
squares on graph paper, using the numbers 11 - 20, determining which are even
and which are odd.

 -Gail, for the Teacher2Teacher service

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