Each month, this section of the problem solvers department showcases students' in-depth thinking and discusses classroom results of using problems from previous issues of Teaching Children Mathematics. In these solutions to the November 2015 problem, readers have a window into early elementary students' problem solving and understanding of measurement. Third graders were presented with tasks using maps of two lakes and various manipulatives to determine the bigger lake. Students discovered and were able to articulate that identifying the bigger lake depends on the attributes, area, and perimeter explored and that different attributes could result in different solutions.

Contributor Notes

Regan Bachour

Sarah Braun are elementary education majors in their junior year at Clemson University.

Andrew M. Tyminski is their professor for elementary mathematics methods. Together they have been working on facilitating problem-solving tasks that allow them to focus on eliciting and responding to children's mathematical thinking.

Edited by J. Matt Switzer, j.switzer@tcu.edu, an assistant professor of mathematics education at Texas Christian University (TCU), and Sarah Quebec Fuentes, an associate professor of mathematics education at TCU.

(Corresponding author is Switzer j.switzer@tcu.edu)
Teaching Children Mathematics
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