A compilation of responses received from over 100 agencies that participated in a survey conducted in the spring of 1986, this directory lists agencies which, with rare exceptions, meet the following criteria: (1) the agency must be located in the mid-Atlantic region made up of Delaware, the District of Columbia, Maryland, New Jersey, and Pennsylvania; (2) it must not be a for-profit, commercial enterprise; and (3) it must offer some level of services, technical assistance, information resources, or other support to educators other than a mandated constituency or an exclusive membership. Separate listings are provided for state departments of education, intermediate service agencies (New Jersey and Pennsylvania), Educational Resources Information Center (ERIC) Clearinghouses, and finally, the Regional Educational Resource Agencies, a group which comprises the bulk of the directory. Also provided are instructions for using the directory, a primary services index, a primary areas of expertise index, and the survey instrument. (KM)