This Instructional Activity is a part of the Lesson 19, Unit 1, Grade 6. This activity gives students a chance to explain and reflect on their work. In groups of 2-3, they share drawings of their tent design, an estimate of the amount of fabric needed, and the justification. They compare their creations with one or more peers. Students discuss not only the amount of fabric required, but also the effects that different designs have on that amount.