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Odd Shape Out

big solutions to little problems

Jo Ann Cady and Pamela Wells

Solutions to a previous Solve It problem are discussed, and the procedures used with problem solving are explored.

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Pamela J. Dunston and Andrew M. Tyminski

Techniques for teaching mathematics terminology allow adolescents to expand their abstract reasoning ability and move beyond operations into problem solving.

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Solve It! Student Thinking: Shaded Rectangles

big solutions to little problems

Students' thinking is discussed, and the procedures used with problem solving are explored.

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Making Squares

little problems with big solutions

Annie Perkins and Pamela J. Wells

To elicit creative student thinking, this open-ended problem asks solvers to measure as many squares as possible using a certain size of cardboard.

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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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Matt B. Roscoe and Joe Zephyrs

Pull on the threads of congruence and similarity in a series of lessons that explores transformational geometry.

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Michelle T. Chamberlin and Robert A. Powers

the properties of rotations, reflections, and translations. •  CCSS.Math.Content.8.G.A.2 : Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and

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Brooke Becker

This activity allows students to build their own understanding of what it means to develop a solid argument.

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Jo Boaler

Engage your learners through tasks proven to significantly promote reasoning and problem solving, which touch on many of the Mathematics Teaching Practices in Principles to Actions: Ensuring Mathematical Success for All. These tasks are discussed in this article, another installment in the series.

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Robert Reys and Rustin Reys

Get your students to rally around the connections between mathematics and tennis.