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## Volume 114 (2021): Issue 4 (Apr 2021)

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## Authentic Choice in Mathematical Assessments

Ear to the Ground features voices from various corners of the mathematics education world.

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## Cakes, Cookies, and Gumballs, Oh My!

First graders learn about artist Wayne Thiebaud and explore estimation, counting, and probability while creating an artistic masterpiece.

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## Chunking the Reading: Solving “Wordy Problems”

Reading mathematics problems can frustrate students to the point of shutting down. Although Pólya’s four-step plan is a well-known problem-solving framework, my students benefited from a more concrete and detailed approach: chunking the reading.

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## Constructing and Adapting Technology-Infused Lessons

Design principles are used to construct and refine a technology-infused lesson for beginning algebra students learning about systems of linear inequalities.

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## A Gift Box Filled with Mathematics

We look at a simple origami box that can be made from two sheets of regular printing paper. In the context of the construction of the box, we explore problems that emerge at the intersection of algebra, geometry, and calculus.

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## GPS: The Relationship between Area and Volume

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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## Integrating Machine Learning in Secondary Geometry

Despite the importance of artificial intelligence in our daily lives, it has yet to be integratedinto K–12 classrooms in a meaningful way. Explore a lesson in which geometry students useEuclidean distance to implement a functional machine learning algorithm in Google Sheets™.

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## Launching a Mathematical Modeling Lesson

Five teacher discussion strategies and outcomes of students’ responses to each are illustrated with examples.

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## Planning Pitfalls: Considerations for Decision-Making

Within a single internet search, thousands of results occur when looking for a lesson or mathematics activity. However, the results are not all of good quality. We present a mathematics lesson planning protocol (MLP2) to help process the search results and offer experiences of teachers using the protocol.