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RichardLehrer. 1999. “Teaching and Learning with Understanding.” In Mathematics Classrooms That Promote Understanding
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ThomasRomberg, pp. 19–32. Mahwah, NJ: Lawrence Erlbaum Associates.)| false
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.