Explore two ways that algebra students interpret mathematical expressions. Learn instructional tasks to help students develop meaning.

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### John K. Lannin, Christopher Austin, and David C. Geary

### George J. Roy, Matthew Cunningham, and Kenneth Rafanan

Teachers have the opportunity to make mathematics relevant. We leveraged the popularity of *Star Wars* to engage students in exploring and connecting two dimensions and three dimensions to careers in toy design.

### Natasha E. Gerstenschlager and Katherine Ariemma Marin

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.

### Sandy Vorensky

This department provides a space for current and past PK-12 teachers of mathematics to connect with other teachers of mathematics through their stories that lend personal and professional support.

### Gail Burrill, Joan Funderburk, Becky Byer, and Rachael Gorsuch

Classroom stories show how using technology to investigate the wage gap provided opportunities to develop students’ identities and agency and enabled a classroom culture of sharing and risk-taking.

### Sherri L. Martinie

Given the numbers and data at our fingertips in this digital age, mathematical and digital literacy skills are imperative when it comes to understanding natural and social phenomena and making good decisions. As teachers we are responsible for helping students make sense of this information

### David B. Custer and Ksenija Simic-Muller

We reflect on recent presentations at the NCTM annual conference and articles in MTLT that address statistics, data modeling, and data science. We observe that such presentations and articles are increasingly common, and encourage readers to use them in their teaching and write about their own adventures with data.

### Stephanie Casey, Liza Bondurant, and Andrew Ross

This Perspectives on Practice manuscript focuses on an innovation associated with “Engaging Teachers in the Powerful Combination of Mathematical Modeling and Social Justice: The Flint Water Task” from Volume 7, Issue 2 of *MTE*. We built on integration of mathematical modeling and social justice issues in mathematics teacher education to similarly integrate statistical investigations with social justice issues.

### Robert Powers and Michelle Chamberlin

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.