Joy Whitenack is an associate professor of mathematics education at Virginia Commonwealth University, USA. She teaches undergraduate and graduate mathematics courses for future elementary teachers and for practicing teachers planning to become math coaches. Her research interests include children's number sense, teacher learning, and teacher leadership.

Laurie Cavey is an associate professor of mathematics education at Boise State University, USA, teaching mathematics courses for elementary, middle, and high school teachers. Her research interests include example-based reasoning, proportional reasoning, and functions.

Cat Henney is the Math Specialist at Sabot at Stony Point, an independent school in Richmond, Virginia, USA serving children from preschool through 8th grade. She works with teachers to develop and implement best practices for mathematics instruction, and also teaches college courses for teachers.