Presented is the 5-year (1974-1979) plan of Tennessee by the State Division of Mental Retardation. Changes in philosophy and service delivery to mentally retarded (MR) persons are discussed in terms of definition, causes, classification, and training for employment. Ways of helping MR persons are described in relation to previous efforts and new attitudes such as normalization. Resources for action are seen to include mental institutions as developmental centers which coordinate existing community and school programs in three areas. Strategies for action are proposed for Arlington, Clover Bottom, and Greene Valley developmental centers and for delivery of services to clients through community workshops, residential centers, adult activity centers, and preschool training programs. Maps are provided showing location of residential, adult activity, preschool, and sheltered workshop centers for the three areas and sub-regions (three for each area). Statistical data on costs and client number for the 5-year period accompany the maps. Noted are supportive systems such as research and development. Covered in a plan summary are projections of client growth and costs. (Appendixes include tables, charts, and textual material giving information such as incidence of MR persons and aspects of community programs.) (MC)