This report describes the creation, funding, promotion, and evaluation of the three resource centers and the instrument repair center of the Del Mod System. Included in the document are descriptions of the three science-mathematics resource centers at the University of Delaware, Delaware State College, and Delaware Technical and Community College. The mechanics of operation of a resource center and teachers' and field agents' views regarding centers are described in some detail. A summary includes comments about various aspects of the center programs with recommendations for future activities and for others interested in similar developments. Appendices include the original Del Mod proposal, operational policies, questionnaires, and cost data. (RH)