This report analyzes the effect of the California Dental Disease Prevention Program (DDPP). The program includes education about dental health and nutrition, daily toothbrushing and flossing, and weekly application of a fluoride mouthrinse. The DDPP serves approximately 350,000 elementary school children. The implementation of the DDPP is described in the first chapter. Chapter two summarizes the methodology of the study of the program conducted by the Center for Dental Services Research of the University of California, San Francisco. The third chapter reports the results and shortcomings of the study. In chapter four a discussion is presented on the impact of the program on state expenditures for medical and dental care. A description is given in chapter five of the options for improving the program's cost-effectiveness, and chapter six presents conclusions and recommendations. (JD)