The document discusses design-based research (DBR) as a methodology for improving educational practices through iterative design, development, implementation, and analysis of learning environments based on collaboration between researchers and practitioners. It provides characteristics of DBR such as being pragmatic and theory-driven, using mixed research methods, and accounting for contextual influences. Principles of DBR are outlined, such as supporting design with research, setting practical goals, and continually refining designs. Challenges of DBR as an emerging methodology are also mentioned.