Lessons that focus on a conceptual understanding offer an opportunity for students to learn about mathematical structure, not just computation.
Allaire, Patricia R., and Robert E. Bradley. 2001. “Geometric Approaches to Quadratic Equations from Other Times and Places." Mathematics Teacher 94, no. 4 (April): 308–19.
Boyer, Carl B. 1968. A History of Mathematics. New York: Wiley.
Chang, Kenneth, and Jonathan Corum. 2020. “This Professor’s ‘Amazing Trick’ Makes Quadratic Equations Easier." The New York Times, February 5, 2020. https://www.nytimes.com/2020/02/05/science/quadratic-equations-algebra.html.
Edwards, Thomas G., and Kenneth R. Chelst. 2019. “Finding Meaning in the Quadratic Formula." Mathematics Teacher 112, no. 4 (January): 258–60.
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