Knowledge of the Earth and how it works is a fundamental part of understanding the ecological and societal aspects our world. Yet, compared to other natural sciences, geology is commonly relegated to a minor role in K-12 curricula; one course in the 7th or 8th grade is typical. A family visit to a national park is one of the few places where students and adults might be exposed to exceptional geological features. But parks are often understaffed in terms of geological expertise and methods to convey important concepts to the public. This talk examines aspects of the geology of national parks that can be presented to the public in exciting and meaningful ways. It suggests methods by which teachers and park staff might encourage students and park visitors to examine geology in terms of Earth processes so important to society.