Lesson plan

Demonstrate understanding of the distributive property by using arrays

teaches Common Core State Standards CCSS.Math.Content.3.MD.C.7c http://corestandards.org/Math/Content/3/MD/C/7/c
teaches Common Core State Standards CCSS.Math.Content.3.OA.B.5 http://corestandards.org/Math/Content/3/OA/B/5

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Big Ideas: Understand how to break apart factors into smaller parts (distributive property) in order to get the same product by adding the two smaller products together. This lesson builds on students’ knowledge of multiplication and how to represent multiplication in arrays, equal rows and columns. Students build arrays to when starting to solve multiplication problems prior to memorizing their facts. In this lesson students will learn how to break apart factors into smaller parts when they come across unfamiliar facts. The mathematical concepts in this lesson build towards students’ future work with multiplying and dividing larger numbers using multiple strategies. Vocabulary: factors, product, array, distributive property Special Materials: two-sided counters (optional)