We had 6 groups of students work collaboratively on this project. Students chose their own groups after having a class discussion about what makes good groups and how to choose good partners for projects. After making the groups, students had 45 minutes to discuss, plan, and build their package. They then weighed the package and decided how to mail it using http://postcalc.usps.com/. The also edited the Google Doc to note the materials, cost, and expected profit.