This booklet presents descriptions of adult education programs on basic skills in mathematics that have been validated as successful by the National Diffusion Network. These projects have been developed by individual school districts throughout the nation in response to their local needs and are being promoted by the National Diffusion Network (NDN). The Joint Dissemination Review Panel (JDRP) of the U.S. Department of Education has reviewed and validated the data presented by each project, and these programs are available for adoption by other districts. The introductory pages of the booklet contain an alphabetical listing of 46 programs, an index of programs by mathematical topic, and an index of programs by the grade level(s) for which they have been validated. The summaries of each project then follow. Most include audience, description of the program, costs, services, and contact person(s). (MNS)