Tasks and materials that allow for different approaches can help teachers incorporate student reasoning and can promote connections across different mathematical ideas.

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Lamon, Susan.2007. “Rational Numbers and Proportional Reasoning: Toward a Theoretical Framework for Research.” In )| false

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Lappan, Glenda,
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Nikula, Johannah.2010. “Secondary School Students’ Proportional Reasoning.” In )| false

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Smith, Margaret S.,
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ÓscarChávez,
JeffreyShih, and Steven J.Osterlind. 2008. “The Impact of Middle-Grades Mathematics Curricula and the Classroom Learning Environment on Student Achievement.” )| false