Cosmic education provides children in the second plane of development (ages 6–12) with a broad, interconnected understanding of the universe and their place within it. This approach helps children see the interdependence of all living and non-living things, and fosters a sense of responsibility and purpose. Through the Great Lessons—narrative-based introductions to the origins of the universe, the development of life on Earth, and the progress of human civilization—children gain a holistic view of history, science, and culture. Montessori believed that presenting knowledge in this way nurtures a deep appreciation for humanity’s role in the cosmos and inspires students to become active contributors to society. For adolescents in the third plane of development (ages 12–18), the concept of Cosmic education extends beyond the classroom into real-world experiences. At this stage, Montessori envisioned the learning environment as the world itself, where students engage with society directly and take on meaningful work that helps them understand their own cosmic task and purpose.