This interrupted case study for the flipped classroom examines the interaction of plants and their mycorrhizal partners. The latter is one of the most widespread and vital symbiotic relationships in the world and can be seen in the videos that students should view before discussing the material in class. Thousands of different species are involved, some obligate and others facultative. The case examines the recent studies identifying the spectacular and wide array of intraspecific and interspecific chemical communication among organisms, giving us a glimpse of the enormously complex interactions in an ecological community. The case can easily be used as a springboard for discussion about the social and political issues that might arise when humans disrupt these ecosystems. The case was developed for college general biology but can easily be used in environmental science, ecology or evolution classes. In fact, several of the questions raised address issues that are most appropriate for advanced students. What is essential is that the students have a general knowledge of fungal anatomy and mycorrhizae before starting the activity.