The families served in the Cornell-OEO Project in South Brooklyn are described from three points of view: on a one-to-one basis, as selected subgroups, and in terms of educational work with groups. The one-to-one approach was used most. Demographic data for those served this way include family size, ethnic characteristics, residence location, welfare status, sex of household head, and employment status. A three-level typology based on family problem loads was developed. Thumbnail sketches of 75 families representing the three levels are given. The families were divided into subgroups with unique service needs as elderly, one-visit, and prolonged service. Workshops were held in both formal and informal sessions which formed a significant part of the project activity. Critical factors in their success were personal contact, relevance of content, accessibility, and provision of child care. (MS)