The paper describes all aspects of a train-the-trainer course that was applied to research data literacy to serve two goals: a) allowing future trainers to gather and combine content according to the needs of their students and organizational parameters, b) providing them with essential knowledge concerning didactical approaches to the matter. The course was centered around a series of practical exercises that asked the participants to start with a two dimensional representation of all possible competences and skills to acquire before reducing them to a linear sequence of the concrete course content, and finally the punctual specification of a single lesson.