Teacher2Teacher 
Q&A #1643 
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From: Jane Stock <jane_stock@hotmail.com> To: Teacher2Teacher Public Discussion Date: 2000051816:34:05 Subject: Re: Using manipulatives to teach multiplication Here's what I've found successful: Use tiles to show an array. Helpful vocabulary: columns, rows Using either plastic or ceramic tiles, model how you would make equal rows using 4 tiles, then 6 tiles, then 8. As you develop the concept of an array with students, ask them why & how questions: Can you make an array from 5 tiles? 7 tiles? 9 tiles? Show me how or why it does or does not work. (1 x 5 works, as does 1 x 7, etc.) Try to have students develop a definition of an array after trying different totals. Model the writing process for a definition and have them write in their math journals what they did to make an array (emphasizing the process). To begin to bridge to the algorithm for the next lesson: Model using paper under the tiles and drawing the squares that would show an array for a number. (You can trace around the tiles on an overhead projector to model it). The next phase is to have the students draw their arrays on graph paper (preferably 1inch square), color, and cut them out, creating a large poster that shows all of the ways to "make" 1, 2, 3, 4, 5, etc.
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