The research for this video comes from the article, “Three Balloons for Two Dollars” by Cynthia W. Langrall and Jane Swafford. The article can be found here: tidewaterteam.wm.edu/MPDCDocs/smpdfs/proportionareasoningmtms.pdf. How do the questions suggested in the video lead to the development of proportional reasoning? How is this different from teaching students to simply use a proportion to solve a problem? For the Mr. Tall, Mr. Short task, click here: tidewaterteam.wm.edu/MPDCDocs/smpdfs/TallTask.pdf. For additional information and a lesson on proportional reasoning go to Module 5 on proportional reasoning at tidewaterteam.wm.edu/MPDCDocs/index.php

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