Training materials are beginning to be developed, packaged and (sometimes) evaluated for use by behavioral professionals to train nonprofessionals teaching and care-giving skills; however, economic factors in many programs require that non-professional staff be trained by their non-professional predecessors. To evaluate the function of training material built into an infant day care system, an experimental design was developed to efficiently analyze the transmission of skills from one worker to the next across several "generations" of workers. When staff members were simply instructed to train their replacement "until they knew their job," each successive generation of worker was markedly less accurate than the last; however, when explicit training materials were available to the staff members, high accuracy was consistently maintained across successive generations of workers. This "generation design" requires only as few as eight subjects for an experimental demonstration of the adequacy of the training materials for transmitting skills across successive generations of staff. (Author)