The presenters will discuss the implementation of a Data Use Professional Development course which is organized according to 5 stages of a data inquiry model. The model provides an inquiry framework to support PLCs as they learn how to use data for problem solving and decision-making. The model tracks five distinct stages of inquiry: Preparation, Discovery, Diagnosis, Doing, and Evaluation. The course was designed to guide PLCs through a structured and iterative application of the 5-stage model, relying heavily on data analysis and collaboration protocols, templates and tools, and authentic learning activities to build the necessary technical, analytical, and collaboration skills. The course helps build the capacity of the school-based teams to not only engage in their own inquiry, but to serve as catalysts for whole-school data-driven decision making. The presenters will share the theoretical basis for the data use course (i.e. theory of action) as well as the general course structure. Additionally, specific tools and protocols will be shown as examples of how the course utilizes authentic learning activities to build data-driven decision making capacity. Finally, the presenters will share specific examples of how PLCs from the five participating countries have engaged in the course this school year.