Rich mathematical tasks—here, finding and categorizing the quadrilaterals that can be made with vertices on a 4 × 4 grid—can promote adaptability in any classroom.

Contributor Notes

Kerri Richardson, kerri_richardson@uncg.edu, is an associate professor of mathematics education at the University of North Carolina at Greensboro. She is interested in how teachers use representations to improve students' understanding of mathematical content.

Anne Reynolds, areynol5@kent.edu, is an associate professor of mathematics education at Kent State University in Ohio. She is interested in how students learn mathematics and in supporting their learning through problem-solving activities.

Catherine S. Schwartz, schwartzca@ecu.edu, is an assistant professor of mathematics education at East Carolina University in Greenville, North Carolina. She is interested in the ways in which elementary teachers develop their mathematics teaching over time.

(Corresponding author is Richardson kerri_richardson@uncg.edu)
(Corresponding author is Reynolds areynol5@kent.edu)
(Corresponding author is Schwartz schwartzca@ecu.edu)
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