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Colleen Haberern

Students used a pinch of this (a 3D printer and geometry software) and a cup of that (various volume formulas) to complete a tiered task.

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Stephanie M. Butman

Research on students' learning has made it clear that learning happens through an interaction with others and through communication. In the classroom, the more students talk and discuss their ideas, the more they learn. However, within a one-hour period, it is hard to give everyone an equal opportunity to talk and share their ideas. Organizing students in groups distributes classroom talk more widely and equitably (Cohen and Lotan 1997).

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U.S. Postal Service box dimensions are explored

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Jenny Salls

Gain insight into students' understanding of the concept of fraction as operator as well as their reliance on rote procedures to convert fractions to decimals.

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Kathy E. Prummer, Julie M. Amador, and Abraham J. Wallin

A scaling task that incorporates rectangular prisms can net an increase in students' geometric understanding.

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Math for Real: Packaging Golf Balls

“when will I ever use this?”

Randy Hall

A package of three golf balls provides the real-world scenario for this ratio and area activity.

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Edited by Stephen P. Smith and David Spangler

A cartoon involving pi (or 3.14….) is coupled with a full-page activity sheet.

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Shirley M. Matteson

Use this visual tool to plan lessons and assessments, diagnose gaps in students' conceptual knowledge, and help you and your students see connections within a particular lesson objective.

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Kimberly Sipes Hartweg

Building a rod raft allows students to make mathematical connections among a model, a table, a formula, and a graph.

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James Metz

Students analyze how many trees are used to produce toilet tissue.