Lesson plan

Generate all factor pairs for a given number and prove they have all been found by using an area model or t-chart

teaches Common Core State Standards CCSS.Math.Content.4.OA.B.4 http://corestandards.org/Math/Content/4/OA/B/4

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Big Ideas: There is a relationship between the factors and multiples of a whole number. Every whole number has a distinct set of whole number factor pairs. Now that the students have learned some strategies for identifying the factor pairs of a whole number (area model and t-chart), they now need to be able to prove that they have found all of the factor pairs. In this lesson the students will be presented with a task where they will have to justify their conclusions, communicate them, and respond to the arguments of others. They will need to find the factor pairs of a larger number and prove, with evidence that they have found all of the factor pairs. Vocabulary: factor pairs, area model, t-chart Special Materials: grid paper 1 inch tiles