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Lesson Plan

Generate equivalent fractions with denominators of 10 and 100 using various models

teaches Common Core State Standards CCSS.Math.Content.4.NF.C.5 http://corestandards.org/Math/Content/4/NF/C/5
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Big Ideas: We can use equivalent fractions to help us compare fractions with denominators of 10 and 100. There are different models to help us find equivalent fractions. In order to compare fractions they have to be in the context of the same whole. This lesson builds on students’ knowledge of decomposing fractions by exploring equivalent fractions with denominators of 10 and 100 through a story problem. Students must choose the largest sample sizes in an order from. Using base-10 blocks, grids, and number lines, students will generate equivalent fractions for denominators of 10 and 100 and discover that it is easier to compare fractions when they have like denominators. This builds the understanding that generating equivalent fractions is one strategy for adding fractions with unlike denominators. Vocabulary: fraction, numerator, denominator, equivalent fraction, comparing, greater than, less than, equal to, tenths, hundredths, whole Special Materials: Base-10 blocks (20 rods, 20 cubes, & 1 flat for each student) Model Mat to be inserted into protective sleeves (See Supplementary Resources section at end of lesson plan) Fractional Sweets Dessert Shop Task Worksheet (See Supplementary Resources section at end of lesson plan)
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