Lesson plan

Identify fractions on a number line by measuring fractions of an inch

teaches Common Core State Standards CCSS.Math.Content.3.NF.A.2a http://corestandards.org/Math/Content/3/NF/A/2/a
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6

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Big Ideas: A fraction is a number that represents parts of wholes and has a specific location on a number line. The denominator is the total number of equal shares between whole numbers. The numerator is the number of equal shares that is represented. This lesson builds on students’ work with partitioning wholes into equal shares and composing a whole using area models and number lines. This task requires students to measure bugs to the nearest fraction of an inch using a ruler. Students will be applying their knowledge of composing unit fractions to generate a fraction on a real life number line--a ruler. Students will also be representing the data on a line plot. The mathematical concepts in this lesson build toward students’ future work with naming and locating fractions on a number line, comparing fractions, equivalent fractions, measurement, and analyzing data. Vocabulary: fraction, unit fraction, numerator, denominator Special Materials: Bugs and Line Plots (Supplemental Handout) rulers (optional) Paper Rulers with Fractions Marked (Supplemental Handout)