Teacher2Teacher 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 Visit us again at http://forum.swarthmore.edu/t2t/

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