This report documents and evaluates the activities of the Urban Mathematics Collaborative (UMC) project during the 1988-89 school year. UMC seeks to improve mathematics education in inner-city schools and identify new models for the professional development of mathematics teachers by supporting collaboration among mathematics teachers and mathematicians from institutions of higher learning and industry. Teachers are encouraged to identify with and participate in a broad-based local mathematics community. The project is currently operating in 11 cities across the country. A variety of qualitative and quantitative methods were used to evaluate the project. The following summary findings are presented: (1) the Education Development Center (EDC), a nonprofit research and development organization, assumed more responsibility for management of the project, freeing the technical assistance component and the outreach component to spend more time helping individual sites with substantive problems; (2) individual collaboratives began to view themselves as members of a larger network that could accomplish greater goals as a result of constant pressure from EDC; (3) individual sites need to develop firmer management structures; and (4) the sites did achieve some common goals because of the unifying focus provided by EDC and because many sites had resolved basic issues of finance and organization. Descriptions of the 11 UMC collaboratives are included. A list of 10 references and summary reports from the 11 collaboratives are appended. (FMW)