A complex view of learning recognises that learning cannot be pre-determined by teaching, but is as much defined by circumstances and context as pre-defined learning objectives. Learning designs that accept uncertainty help us to envision classrooms and curricula that are open, dynamic and innovative. Architect Christopher Alexander's patterns and pattern language offer a means for researchers, practitioners, learners, and technologists to capture and share the emergent processes of complex learning. This paper examines the unique properties of patterns that support complex design tasks and suggests a design-based research framework for operationalising its practice. Through the thoughtful explication, mining and construction of patterns, all participants can contribute to a richer learning system.