This chapter presents a case study on Using Sensors for Monitoring and Communication using the discovery engineering process. In this lesson, students learn about the accidental discovery of microsensors and also read about contemporary research on sensor-based communication technologies for dogs. After reading the case study, they plot and interpret sensor data from a sample data set collected during a dog’s search-and-rescue training. Last, students use case information to research a particular type of sensor technology and describe a new way for this sensor technology to be used. A list of materials, teacher background information, teacher notes, references, resources, assessments, and standards are provided. This book selection also includes the Table of Contents, About the Authors, Acknowledgments, Introduction, and Index.