Students make strategic choices–and justify them–to solve a system of two linear equations.
*Samuel Otten, firstname.lastname@example.org, is an assistant professor at the University of Missouri. He is interested in promoting secondary students' engagement in mathematical practices.
*Andrew Otten, email@example.com, is a mathematics teacher at Northview High School in Grand Rapids, Michigan. He is interested in learning and creating new ways to provoke students' deep understanding.
© 2020 National Council of Teachers of Mathematics (NCTM)
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