As an introduction to our unit on surface area and volume of solids, my students investigated cross-sections of solids through a Play-Doh Cross Sections lab activity. Materials: play-doh, paper plates, dental floss, plastic knife, and ruler. Each student in a team of four constructed two of the solids listed on the record sheet. When the team finished building models with the specified cross sections, they used the All Write RoundRobin structure to share their discoveries and complete the record sheet.
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