Sketching is a universal activity that first appears when we play as children, but later, it is often overlooked as a useful skill in adult work - yet it can bring multiple benefits to research and practice. Specifically, our field of Human-Computer Interaction (HCI) embraces interdisciplinary practices, and amongst those, sketching has proven to be a valuable addition to the skill set of researchers, practitioners, and educators in both academia and industry. Many individuals lack the confidence to take up pen and paper after years of non-practice, but it is possible to re-learn these lost skills, improve on them, and apply them in practical ways to all areas of work and research. This course offers a journey in sketching, from scribbles and playful interpretations to hands-on and theoretical information inherent in sketching practice. Attending individuals will learn techniques and applied methods for utilizing sketching within the context of HCI, guided by experienced instructors.