Addresses objectives intended to improve juvenile detention practices and increase the cost effectiveness of the training of professionals who work in the system. It provides a review of the literature on job-related skills and related training needs, determines common training practices, and makes recommendations for assessing and improving training. Details of training services are provided, including local and national services, formal education, and training technology. The origin, design and results of the Training Needs Assessment Inventories are discussed and the implications for training curricula are examined. Tables and references.