This module is an outstanding teaching tool for helping students develop a greater understanding of how mathematical reasoning can be used to make decisions every day. Activities like rolling marbles, number cubes, and coin tosses introduce probability. After reading several historic cases, students are presented with a hypothetical life-or-death decision involving an epidemic disease. They are asked to make recommendations about ways to reduce the risks associated with local emergency or disaster situations that could be either natural or human-caused. The assessment emphasis is placed on student understanding of trade-offs and decisions. Kit includes teacher guide.