In research-based learning projects, students at the »Real-Time City« research center learn reflexive practices of generating knowledge about the city and co-designing urban spaces that involve processes of analysis and synthesis, design, experimentation, materialization, and communication, thus illuminating the relationships between urban thinking, knowledge, and action in a variety of ways. The projects collected here offer insights into the various ways in which urban knowledge is generated and unexpectedly linked to socio-spatial and interactive practices, concepts and media in design.