In matters of teaching design for sustainable change, we are still in a situation that requires us to break new ground. New sets of tools, methods, and criteria are needed. One important criterion is the aspect of temporality. Not thinking about design's long-term effects, pushing acceleration, and neglecting the future have been a major cause of our unsustainable present. Still time is not commonly addressed in design education. To work with time offers several exciting possibilities. One is to extend the focus onto the entire life cycle of an artefact, exploring technical solutions and systems; another is to address aspects of planning for an unpredictable future. The third, which is at the core of my research, is to focus on design as a process rather than an object, and to design time itself. Design is what it makes possible, what it allows for, not what shape or finish it has. My research, which taken place through work with students and staff at the Department of Design, hopes to inspire new ways of working with sustainability within design educations.