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## Odd Shape Out

### big solutions to little problems

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

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## What's the Big Deal about Vocabulary?

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

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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## The “Brick Wall” Graphic Organizer

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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## Quilt Block Symmetries

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

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## GPS: Congruency through Superposition

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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## Addressing Common Misconceptions with Informal Arguments

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

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## Prove It to Me!

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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## Mathematics, Anyone?

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