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Stephan Pelikan, Anna F. DeJarnete and Stephen Phelps

A monthly set of problems is aimed at a variety of ability levels.

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E. Fanny Sosenke and Tala Councilman

A real-world problem about the cost of moving one's household from one city to another.

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Kasandra Dickman and Laura Bofferding

This department explores a game used to help students learn about additive inverses, or “zero pairs.” Authors describe some common reasoning that students used while playing the game and provide activity sheets geared toward students in grades 5–7.

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Courtney Starling and Ian Whitacre

Introduce your students to a fun and innovative game to encourage precise communication

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Frieda Parker and Vida Treviño

This activity engages students in a lesson about algebraic relationships concerning groupings of hamburgers and French fries, coupled with full-page activity sheets.

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Stephan Pelikan, Anna F. DeJarnette and Stephen Phelps

A monthly set of problems is aimed at a variety of ability levels.

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Erin M. Meikle

For orchestrating whole-class discussions, note these suggestions to fine tune problem-solving techniques into cognitively challenging tasks.

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Aina K. Appova

Students analyze the probability of receiving a lifetime of free coffee.

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A cartoon exploring a problem about salaries, wages, and percentages is coupled with a full-page activity sheet.

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A cartoon exploring a problem about order of operations is coupled with a full-page activity sheet.