This course will be a comprehensive educational resource available to goalkeeper coaches who want to understand the game more deeply, apply the principles to their session design, and ultimately aid in the development of the goalkeepers they work alongside. This four month course will establish principles of play for the goalkeeper position that help guide goalkeepers to more effective decision making in games, help coaches to learn the principles of session design decision that underpin skill acquisition, identify common errors in each task of the gk and develop problems to promote adjustment, and form a framework for WHAT coaches trying to develop and HOW to design an environment that promotes those skills.