Three approaches to the Doughnut task highlight how representing functions in multiple ways can support student understanding in interpreting key features of functions within a context.

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### José N. Contreras

### Nicole Garcia, Meghan Shaughnessy, and D’Anna Pynes

Representing and recording student thinking in public spaces during mathematics discussions is challenging work. We share principles for recording student thinking in the moment and share an activity for improving your recording practice.

### Emiliano Gómez, Risa A. Wolfson, and Introduction by: Trena L. Wilkerson

When implementing this task, you see multiple effective teaching practices at play (

### Nina G. Bailey, Demet Yalman Ozen, Jennifer N. Lovett, Allison W. McCulloch, and Charity Cayton

Three different technological activities to explore parameters of quadratic functions each has its own pros and cons.

### Thomas Edwards, S. Asli Özgün-Koca, and Kenneth Chelst

A quadratic equation was the basis for activities involving both concrete and technological representations.

### Paul A. Frisoli and Richard A. Andrusiak

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.

### Karen S. Karp, Sarah B. Bush,, and Barbara J. Dougherty

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

### Enrique Ortiz

This article includes an original artwork using geometry. Art such as this can foster understanding and appreciation of fundamental concepts across fields.

### Micah S. Stohlmann

An escape room can be a great way for students to apply and practice mathematics they have learned. This article describes the development and implementation of a mathematical escape room with important principles to incorporate in escape rooms to help students persevere in problem solving.