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## Encouraging Students to LOVE MATH with One-Straight-Cut Letters

One-straight-cut activities engage middle-school students in learning about symmetry and geometric transformations.

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## GPS: Composing and Decomposing Shapes Across the Grades

Growing Problem Solvers provides four original, related, classroom-ready mathematical tasks, one for each grade band. Together, these tasks illustrate the trajectory of learners' growth as problem solvers across their years of school mathematics.

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## Hyperbolic Duckies

Modeling exponential growth with crochet.

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## Varying the Intensity of Scaffolding for English Learners

Vary the intensity of pedagogical scaffolding along three dimensions—grouping, structure, and language—with the same rigorous prompt.

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## The Beauty of Regular Hexagons

The author shares geometry that inspires him.

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## Problems to Ponder

Problems to Ponder provides 28 varying, classroom-ready mathematics problems that collectively span PK–12, arranged in the order of the grade level. Answers to the problems are available online. Individuals are encouraged to submit a problem or a collection of problems directly to mtlt@nctm.org. If published, the authors of problems will be acknowledged.

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## Construct It! Progressively Precise: Three Levels of Geometric Constructions

This article shares an activity scaffolding the construction of the circumcenter of a triangle, culminating with a Triangle-Ball Championship game.

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## Construct It! Triangle Puzzle Challenges

This article presents an original puzzle that supports students’ development of visual thinking and geometry ideas based on the Van Hiele levels of geometric thought.

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## GPS: Building Popcorn Boxes

Growing Problem Solvers provides four original, related, classroom-ready mathematical tasks, one for each grade band. Together, these tasks illustrate the trajectory of learners’ growth as problem solvers across their years of school mathematics.

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## Imagine It! Choose Your Own Pattern Block Adventure

When given the opportunity to play with mathematical materials and ideas, children demonstrate their mathematical understanding in innovative ways.