This report details a case study of the Tutor-Mentor Connection (T/MC), an organization designed to build infrastructures to expand and improve after-school tutoring and mentoring opportunities for inner-city children in Chicago. The case study was conducted over a 3-month period in 1997 and was intended as a limited exploration of one model for developing an infrastructure among a particular type of primary support organization. The report begins with background on T/MC, including its origins, mission, leadership and staffing, funding and planning efforts. Included are descriptions of T/MC's four primary program components--research, public awareness, resource-building, and education/consulting--as well as the benefits and challenges of each component, according to various interviewees. The report concludes with a discussion of the overall benefits fostered and challenges faced by T/MC, several considerations for T/MC's future work, and suggestions for further study on primary infrastructures. The report's four appendices include a list of people interviewed and materials reviewed for the case study, a supplementary report on a spring 1998 survey of tutoring and mentoring programs, a copy of the interview protocol, and maps of the tutor/mentor program sites and the need for them. (JPB)