High-quality mediation training is essential to producing skilled mediators, but what makes for good training? To answer this question, the authors examine the literature on adult education, mediation training, training design and methods, and quality assurance in mediation training. What follows is a summary and analysis of the literature on issues related to mediation training. This core body of knowledge helps to prepare mediation trainers and program administrators as they seek to ensure that the training they provide or sponsor is of the highest quality possible.