### Rachel Wiemken, Russasmita Sri Padmi, and Gabriel Matney

Teachers from two countries designed a model-eliciting activity about the global issue of wind energy. They share teaching and student outcomes from a cross-border engagement in the task with students from Indonesia and the United States through synchronous video conference.

### Li Sun and Chunlian Jiang

Growing Problem Solvers offers 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.

### Josephine Derrick and Laurie Cavey

Challenging to learn, proof can be equally challenging to teach. Insights gleaned about students’ conceptions of proof from 10 high school students who completed four proof-related tasks during one-on-one interviews led to a few instructional takeaways for teachers.

### Michelle Meadows and Joanne Caniglia

Portrayals in popular media offer ways to convey images of the mathematics field as both beautiful and powerful

### Kathryn O’Connor, Emma Dearborne, and Tutita M. Casa

A version of math workshop centrally positions students to inquire mathematically.

### Jenise Sexton

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

### Ming C. Tomayko

A series of activities uses media coverage of a natural disaster to develop quantitative literacy.

### Nicholas J. Gilbertson

When students encounter unusual situations or exceptions to rules, they can become frustrated and can question their understanding of particular topics. In this article, I share some practical tips.