Lesson plan

Recognize and generate equivalent fractions with denominators of 10 and 100 by using grids

teaches Common Core State Standards CCSS.Math.Content.4.NF.A.1 http://corestandards.org/Math/Content/4/NF/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: There are an infinite number of different names for a given fraction. Saying two fractions are equivalent is saying that the two fractions are different names for the same quantity. This lesson builds on students' work explaining equivalence of fractions in special cases and comparing fractions by reasoning about their size. In this task students use dimes to represent tenths and pennies to represent hundredths. They use grid models to demonstrate the equivalence of fractional tenths and hundredths. This builds toward future work with understanding addition and subtraction of fractions as joining or separating parts referring to the same whole. Vocabulary: fraction, whole, numerator, denominator, equivalent, compare, tenth, hundredth, grid models Special Materials: Blank tenths and hundredth grids (or students can draw their own)