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## Influence and Legacy of NCTM Journals

A personal reflection by Ed Dickey on the influence and legacy of NCTM's journals.

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## Well Played

In this commentary, I share my changing perspective of our new journal as I advanced through the process of becoming the inaugural Editor-in-Chief. Within this narrative, I offer insights into the affordances of the new features of the journal and its contents.

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## Authenticity of Mathematical Modeling

The choice and context of authentic problems—such as designing a staircase or a soda can—illustrate the modeling process in several stages.

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## Solve It!: Parts of a Parallelogram

### little problems with big solutions

To elicit creative student thinking, this open-ended problem asks solvers to calculate the ratio of areas of a parallelogram.

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## Using Covariation Reasoning to Support Mathematical Modeling

Table representations of functions allow students to compare rows as well as values in the same row.

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## Solve It! Student Thinking: Rectangles

### big solutions to little problems

Solutions to an April 2013 Solve It! problem are discussed, and the procedures used with problem solving are explored.

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## Solve It! Student Thinking: Aunt Martha's Cupcakes

### big solutions to little problems

Solutions to a February 2013 Solve It! problem are discussed, and the procedures used with problem solving are explored.

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## The Footprint Problem: A Pathway to Modeling

By exploring an open-ended investigation involving proportional reasoning, students were able to walk through both problem solving and modeling.

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## Fractions Instruction: Linking Concepts and Procedures

Three specific sites, or points in real time, during problem solving gave fifth and sixth graders conceptual understanding, procedural skill, and the ability to justify their mathematical thinking about fractions.

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## Strip Diagrams: Illuminating Proportions

Use strip diagrams to model and solve problems requiring proportional reasoning.