This volume is the third of a series of publications developed by the Massachusetts Dissemination Project and intended for use by educators, parents, and students. One goal of the project is to encourage greater exchange and sharing of resources among educational organizations, service providers, and client groups. Volume three has been prepared to acquaint the reader with some of the dissemination agencies available in the state. These agencies offer programs and services designed to help schools, parents, and communities find, select, and use educational resources. Each of the thirteen agencies is described in terms of services offered, programs or projects, and resources available. Costs are included where applicable. (Author/STS)