Slides from a 4-hour workshop on the Beta RDA Toolkit, combining short presentations and hands-on exercises to help build an understanding of the new RDA Toolkit's structure, navigation basics, and new concepts. Concluded with an opportunity for attendees to practice these concepts in RIMMF4 (RDA in Many Metadata Formats, version 4) using select examples of scores and recordings. Given as a preconference for the 2020 Music Library Association Annual Meeting.