Find zero minus four? Pascal argued it was impossible! Twenty-first-century students, given the right tools, can solve counterintuitive problems.
*Jessica Pierson Bishop, firstname.lastname@example.org, Lisa L. C. Lamb, email@example.com, Randolph A. Philipp, firstname.lastname@example.org, Bonnie P. Schappelle, email@example.com, and Ian Whitacre, firstname.lastname@example.org, are colleagues at the center for research in mathematics and science education at san diego state University in california. they are interested in children's mathematical thinking with a specific focus on mapping developmental trajectories of children's understanding of negative numbers.
© 2020 National Council of Teachers of Mathematics (NCTM)
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