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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