Self-sustaining cycles of substances in closed systems appear mysterious at first. How can such an ecosystem work and how is permanent life within those systems even possible? Behind hermetospheres is a fascinating ecological principle, which shows in an impressively way all on the earth running material cycles in a miniature version. At the beginning of this thesis, the developmental history and the ecological basics related to hermetospheres are described. Subsequently, all materials, instruments as well as the correct methodology required for an own production and maintenance of such a hermetosphere are described in detail. Since many physiological bases of plants and biological processes can be observed in those vessels, they can be considered as an active component of the subject biology and environmental science. Therefore, the last major part of this work concentrates on the theoretical and practical embedment of such a project into the lessons of the fifth to twelfth school level. In the course of the thesis recommendations for age-appropriate experiments as well as a model of a lesson which includes the preparation of hermetospheres were developed. Through the teaching concept presented here, pupils are given the opportunity to get to know scientific approaches and are encouraged to do research independently. Since the hermetospheres show as well a large number of interfaces to other disciplines, various suggestions for the development of interdisciplinary co-operation between different subjects were given in conclusion.