These proceedings are the outcome of a 2-day conference involving education, health, and human service providers who work with children and youth with handicapping conditions across Washington State. The conference's purpose was to bring representatives from interagency teams together to exchange information about how the interagency teams operate, exchange information about barriers/issues related to interagency coordination, participate in staff development on the maintenance of effective interagency coordination and transition, and discuss the commitment both state agencies and local communities have to interagency coordination. Reports are presented from interagency teams focusing on specific program areas, including early childhood, seriously behaviorally disabled, and transition. Each report describes the activities of several interagency teams; the benefits of interagency collaboration to the public, families of handicapped children, and agencies/providers; and key issues. Appendices contain a list of participants, biographical information about conference facilitators and presenters, conference worksheets, an interagency agreement between the Washington State Department of Social and Health Services and the Office of the Superintendent of Public Instruction, eligibility criteria for handicapped students, and conference evaluation results. (JDD)