A customer walks in to a lighting store with a broken ceiling light, and the solution to finding a replacement glass illuminates an alternative approach to finding the circumference and area of a circle without knowing the circle’s center, radius, or diameter.

# Browse

## Broken Ceiling Lights: Circular Area Without the Radius

### Nicholas J. Gilbertson

## Let’s Give Them Something to Talk About

### Nicola M. Hodkowski and Carolyn Carhart-Quezada

Different types of open tasks can be used as a tool to promote rigorous student mathematical discourse and considerations for facilitation.

## Teaching Is a Journey: The Frog in the Well

### Linling Cai Chawla, Amanda Fox, and Elodie Resurreccion

Three authors from different cultural and linguistic backgrounds, who discovered that their understanding of math and education have been limited by their cultural views, collaborate to become better educators.

## Ways to Help Students Become Powerful Mathematical Thinkers

### Alan H. Schoenfeld

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

## Young Mathematicians Take Action Through Sport Clinics

### Jennifer Suh, Gretchen Maxwell, Kate Roscioli, Holly Tate, Padmanabhan Seshaiyer, and Risto Marttinen

A community-based mathematical modeling task focuses on exploring issues of inequities and lack of access to youth sports.

## Adapt It! Adapting Stories and Technology for Engagement in Geometry

### Karen L. Terrell, Dennis J. DeBay, and Valerie J. Spencer

A task to develop and provide access to mathematics for all.

## Build It! The Rectangle Game

### Theresa Wills, Jennifer Suh, Kate Roscioli, Amanda Guzman, Jennifer Everdale, and Sandra Lee

Discover technology-enhanced, game-based tasks and student generalizations.

## Construct It! Triangle Puzzle Challenges

### Enrique Ortiz

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.

## Discuss It! Collaborating on the Tortoise and Hare Task

### K. Ann Renninger, Maria Consuelo De Dios, Annie Fetter, Maeve R. Hogan, Moe Htet Kyaw, Ana G. Michels, Marina Nakayama, Richard Tchen, Stephen A. Weimar, Helena Werneck de Souza Dias, and Feven Yared

The authors share an online collaborative problem-solving activity that integrates support for students’ developing conceptual understanding, focused engagement, and positive feelings of agency and identity.

## Model It! Building and Sustaining Cultural Traditions with Ethnomodeling

### Siddhi Desai and Farshid Safi

This geometric transformation-focused ethnomodeling respects individual and collective community experiences and moves toward educational experiences that acknowledge and celebrate the multidimensional aspects related to identity.