From: Anne Collins
To: Teacher2Teacher Public Discussion
Subject: Re: Enrichment
One nice strategy for the students to develop an understanding is to give them a chip board or algeblocks (on a mat) that is divided into two sections, one positive and one negative negative zero positive Have them place 4 blocks or chips on the negative side representing -4 now ask them to take away - 3 what is left is -1. have them place 4 blocks or chips on the negative side again representing -4 this time have them take away 3...they cannot because there are no positive chips or blocks on the mat...they must add 3 zero pairs to do this(a zero pair is a -1 and a +1) after the zero pairs are placed there are 7 chips or blocks on the negative side and 3 on the positive side...when the kids take away 3 they see there are a -7 remaining. Kids that do this many times are able to see for themselves rather than trusting us to explain. Hope you try this...works great with my students for years.
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