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CONSTRUCT A BUILDING—MULTIPLICATION ARRAY MODEL

Grades: 3‒4

Students use a rectangular array model of multiplication to develop skip counting and “adding on” strategies that help them learn the multiplication facts from 2 × 2 through 11 × 10. Students are asked to find the total number of rooms in a building when given the number of floors and the number of rooms per floor. Students construct a rectangular array as a visual model of the building to solve each problem. As they progress, students develop strategies for finding products. The activity ends with a multiplication “marathon” to assess students’ progress.

OBJECTIVES 
  • Students will use a rectangular array model to explore multiplication.
  • Students will develop strategies for computing up to 11 x 10.

COMMON CORE CONNECTIONS 
Mathematical Practices

(1) Make sense of problems and persevere in solving them; (2) Reason abstractly and quantitatively; (3) Construct viable arguments and critique the reasoning of others; (5) Use appropriate tools strategically; (7) Look for and make use of structure.

Content Standards

3.OA1, 3, 5, 7, 9

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This activity is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License: http://creativecommons.org/licenses/by-nc-sa/3.0/. If you adapt and/or share this activity, you must attribute it to "KCP Technologies, a McGraw-Hill Education Company." You may distribute it only non-commercially under the same or similar license.


This material is based upon work supported by the National Science Foundation under KCP Technologies Award ID 0918733, with grant period September 1, 2009 through August 31, 2013. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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