You may want to wash your hands after you’re done. Students will use unit rates and conversions to analyze the geometry behind the rolls of toilet paper.

Mathematical Domains: Geometry, Measurement and Data,Numbers and Operations, Ratios and Proportional Relationships, The Number System

Standards: Grade Levels 5, 6, 7, 8: 5.OA.3, 5.MD.1, 5.MD.3, 5.MD.4, 5.MD.5, 5.NF.4, 5.NF.7, 6.RP.3, 6.EE.7, 6.EE.9, 6.G.1, 6.G.2, 6.G.4, 6.SP.5, 7.RP.1, 7.NS.3, 7.EE.3, 7.EE.4, 7.G.1, 7.G.4, 7.G.6, 8.G.9

Topics: Unit Rates, Unit Conversions, Volume, Area, Perimeter, Circumference, Diameter, Percents, Measurement

Grade Level(s): Fifth, Sixth, Seventh, Eighth

Duration: 3 to 5 days

Resource: Lesson Plans (Individual), PowerPoint Presentations, PDF, Activities