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Gregg, Jeff, and Diana UnderwoodGregg. 2007. “Measurement and Fair-Sharing Models for Dividing Fractions." Mathematics Teaching in the Middle School12, no. 9 (May): 490–96.10.5951/MTMS.12.9.0490)| false
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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.)| false