In this lesson, students synthesize their learning from the previous lessons to address the module’s culminating challenge—the Gammatown Crisis Challenge. Student teams are each challenged to assume the role of one of several stakeholder groups to create a response to a fictional nuclear accident in Gammatown. They prepare a presentation, printed material, and a physical or mathematical model relevant to the target audience of their team’s stakeholder group. Then, they present these materials during a town hall meeting. A materials list, standards, safety notes, teacher background information, assessment, Internet resources, and references are provided. This book selection also includes the Table of Contents, About the Editors and Authors, Acknowledgments, Appendix, and Index.