Case studies were conducted of nine Comprehensive Employment and Training Act (CETA) prime sponsors which had records of successful cooperation with business firms. To identify strategies employed for increasing the participation of private employers in CETA programs, information was obtained at each site about the local program, labor market, population and enrollee characteristics, placements, relationships with service deliverers and business organizations, and employers' perceptions of the CETA program. Findings which were evident in most, although often not all, of the prime sponsors surveyed included these: (1) the local unemployment rate was only one among several factors influencing employers' participation, (2) a large majority of the on-the-job training and classroom training placements took place in smaller establishments, (3) state and local government agencies together with community organizations accounted for over half the membership of the planning councils, and (4) there was evidence of enrollee selectivity in the program involving the maximum employer participation. Following the introductory overview and summary, the bulk of the document focuses on descriptions of the individual prime sponsors. Descriptions are provided of their individual characteristics, program priorities, linkages with employers, and placement and training records. The final chapter discusses implications for policy. A description of the federal CETA reporting system is appended. (LRA)