Aki showed us a chapter of a Japanese 5th grade textbook which he and a colleague are translating into English. This three-week chapter dealt with the development of the area formulas for quadrilaterals and triangles. As he showed us the pages, he pointed out the frequent use of open-ended questions.
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We spent the rest of the hour in groups finishing our problems.
Problems from each table (PDF and GSP files):
Table 1: What Is the Sum of the Angles?
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This material is based upon work supported by the National Science Foundation under DMS-0940733 and DMS-1441467. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.