A quadratic equation was the basis for activities involving both concrete and technological representations.

Mathematics Teacher: Learning and Teaching PK-12
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  • Melliger, Carmen. 2007. “How to Graphically Interpret the Complex Roots of a Quadratic Equation.” University of Nebraska–Lincoln MAT Exam Expository Papers 35. https://digitalcommons.unl.edu/mathmidexppap/35.

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  • Murray, Natasha T. K. 2018. “Making Imaginary Roots Real.” Mathematics Teacher 112, no. 1 (September): 2933.

  • National Council of Teachers of Mathematics (NCTM). 2000. Principles and Standards for School Mathematics. Reston, VA: NCTM.

  • National Governors Association Center for Best Practices (NGA Center) and Council of Chief State School Officers (CCSSO). 2010. Common Core State Standards for Mathematics. Washington, DC: NGA Center and CCSSO. http://www.corestandards.org.

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