This report describes a classroom project that groups sophomore biology students into "companies" bidding for a "contract" to build a self-sufficient, enclosed city by producing a manual and model of their version of a biosphere. Students must develop technological support systems, social and economic parameters, and systems that meet physical and emotional needs for residents of the biosphere. The report provides a general description of the project and includes the parameters of the problem students must solve. Several goals of the project are described. Students use computer technology to produce the manuals, must learn to work in groups, and are introduced to the use of community resources. Four paragraphs of procedural information address the tasks of choosing groups, getting students together to work on the project, doing the project for the first time, and working with librarians. Resources instructors can make available to the class are suggested. (LZ)