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Q&A #2465


Magical number ten

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From: Gail (for Teacher2Teacher Service)
Date: Nov 03, 1999 at 21:13:41
Subject: Re: Magical number ten

What you are describing is called compensation.  It is a great way to 
compute, because it avoids "messy" regrouping.  You are right, the concept of 
ten is very important for students to recognize and understand.

Have you ever used ten frames?  They are simply 2 by 5 grids that can be used 
to build amounts up to ten.  You can place a group of counters in the frame, 
then determine how many more are needed to reach ten, or you can fill a ten 
frame and then group the counters into two equal (or unequal ) groups, noting 
how many different ways that can be done.

Making bean stick counters is also an interesting experience for young 
students.  Have them count out ten beans and then glue them to a popsicle 
stick.  Now they have a place value model for ten ones.  The more they make, 
the more you have to use with the class, and the more practice and 
reinforcement they get with ten.

 -Gail, for the Teacher2Teacher service

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