The document summarizes a project involving four colleges in France where multidisciplinary creative teams spent three weeks immersed in the colleges. The teams worked to understand the current situation and co-design scenarios and solutions for the future of the colleges. Over 100 innovative solutions and 15 new visions for the future of colleges were developed. Designers used different in vivo and in vitro processes to engage stakeholders to generate visions, solutions, and experiments related to redesigning regional public action and conceiving a new college.