This Train-the-Trainers (TTT) package forms an addition to the CESSDA Data Management Expert Guide and contains different materials that trainers can use in developing and giving Research Data Management training for (social science) researchers. Materials for instance include workshop outlines, slides and exercises that can be reused and adapted by local RDM trainers. The package contains five different types of materials: Workshop Outlines, Exercises, Presentations, Documents and Handouts, and Images.