Communities, Cameras, and Conservation (CCC) is the most exciting and valuable program the author has seen in her 30 years of teaching field science courses. In this citizen science project, students and community volunteers collect data on mountain lions ("Puma concolor") at four natural areas and public parks along the Front Range of Colorado. The project, done in collaboration with the Rocky Mountain Cat Conservancy (RMCC), provides information about wildlife populations and movements, informs the community and land managers about the natural areas, helps minimize human-wildlife conflicts, and brings science into the classroom. This project integrates numerous science principles and skills, covering ecology, plant and animal identification, wildlife behaviors, predator-prey relationships, human-wildlife interactions, and habitat evaluation. Students collect and analyze data, use technology, and produce scientific writing that rivals that of graduate students. (Contains 2 figures.)