GPS: Equivalent Expressions

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  • 1 Dana Hall School, Wellesley, Massachusetts
  • 2 Wayne State University, Detroit

Equality is one of the main concepts in K–12 mathematics. Students should develop the understanding that equality is a relationship between two mathematical expressions. In this month's GPS, we share tasks asking students one main question: how do they know whether or not two mathematical expressions are equivalent?


Growing Problem Solvers provides four original, related, classroom-ready mathematical tasks, one for each grade band. Together, these tasks illustrate the trajectory of learners' growth as problem solvers across their years of school mathematics.

Mathematics Teacher: Learning and Teaching PK-12


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