This report describes four demonstration projects, funded from July 1989 to December 1990 in Oregon, on early identification and prevention of mental and emotional disorders in children. The intention of the projects was to find ways to identify children at risk of suffering emotional disorders and to intervene early enough to prevent these disorders. The first program described, the Interpersonal Cognitive Problem Solving Project, trained 407 second and third grade children, 84 of whom were identified at-risk, in social problem solving skills. Results found that the children who were at-risk demonstrated improvement in problem solving skills. In the second program, the Temperament Project, results found a reduction in the problem behavior of the children of the approximately 100 parents that received temperament services. The third project, the Jackson County Early Intervention Mental Health Project, offered special friends for children who are at-risk, socialization groups, and parent training. Preliminary findings indicated positive and significant changes in socialization. The last project, the Family Service Project, offered parent education and support groups with concurrent and follow-up home visits. Anecdotal evidence from participating parents and agency staff suggested that the project was having a positive effect. (References accompany each section.) (CR)