Lesson plan

# Compare two fractions greater than one by comparing them to a benchmark fraction

teaches Common Core State Standards CCSS.Math.Content.4.NF.A.2 http://corestandards.org/Math/Content/4/NF/A/2
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: Fractions can be compared by comparing them to a benchmark fraction. Fractions can be compared by creating common denominators or common numerators. This lesson builds on grade 3 work of comparing two fractions with the same numerator or the same denominator by reasoning about their sizes. The task asks students to compare four different lengths of ribbon and select the amounts of ribbon that are equal to or greater than 1 1/2 yards (the amount of ribbon the character needs to complete her craft project). This lesson builds towards more complex work with adding, subtracting and multiplying fractions later in grade 4. Vocabulary: fraction, equivalent, numerator, denominator, compare, comparison symbols (, =), greater than, less than, equal to, benchmark fraction