An evaluation examined the efficacy of the program structure, implementation, and outcomes of the Worker Education Program (WEP), a partnership of Northeastern Illinois University; Union of Needletrades, Industrial, and Textile Employees; and 14 employers. WEP's greatest strengths were its conceptual design, program structures, relevant worker-centered curriculum, and instructional training components. Quantitative and qualitative data indicated WEP reached its process and outcome goals to a significant degree. Workers' gains in oral and written language skills and computational ability on pre- and posttests were attributed to curriculum quality, effective instruction, and well-directed teacher training component. Improvements in workplace performance and language skills were augmented in those work sites where workplace education was an integral part of human resource training and quality improvement operations. Interview and case study data from plant supervisors, workers, teachers, and staff confirmed previous findings of significant improvements in numerous communication, math, and workplace competencies. WEP had excellent potential to serve as a model for designing and implementing other WEPs due to its comprehensive framework to guide the program, collaborative workplace education planning, worker-centered and holistic curriculum and instructional approaches, formative evaluation for program improvement, and broadening the concept of workplace education. (YLB)