Heat Unit PBL - Am I Freezing?

For the new Physical Science 20 course, last year I taught the heat unit using a problem based learning format.  My purpose was to encourage students to research the concepts and share their learning in teams.  Students were to focus on research and apply the science concepts to a real problem.  They researched science concepts and vocabulary and then shared their findings with their group.  As we conducted labs and activities, students recorded data and analyzed their results.This project was assessed through self-evaluation and peer evaluation, as well as through quizzes, lab reports and a unit test.  

Sun West School Division is focusing on 21st Century Competencies and is giving teachers professional opportunities to complete a project with these competencies as the core.  A description of my PBL as a 21CC project can be found at this link.  
Please note the original source of this PBL is:  http://wveis.k12.wv.us/teach21/public/project/Guide.cfm?upid=3351&tsele1=3&tsele2=137
Further, a collection of materials for the PBL unit can be found in this file.