Describes cosmic education as the Montessori guide for educating 6- to 12-year-olds. Discusses practical consequences of Montessori's ideas, including the selection of the "great story," the need for physics at the elementary level to teach the laws of nature, the citizen's responsibility for the earth's survival, the importance of aesthetics in the classroom environment, the adult's role, and environmental and political issues as part of cosmic education. (KB)