Add and subtract fractions with like denominators using models and symbols
Turf Touchdown!
Description Students represent the installation of turf, which is installed at different fractional rates each day, in a newly constructed field. By creating a model and determining common fractional units, they will be able to establish how much turf needs to be installed on the final two days. 

Mathematics Addition and subtraction of fractions is frequently introduced using the algorithm of determining common denominators without students understanding why. Students benefit from opportunities to connect the addition and subtraction of fractions to the addition and subtraction of other numbers, all of which require a common unit. When students engage in concrete tasks in which they are required to identify the need for common units and use their understanding of fractions to create equivalent units, they are better able to add fractions appropriately and without error as well as develop fraction number sense. 

Curriculum Connections Students will:


Instructional sequence


Highlights of student thinking Students may:

Key questions


Materials

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