Design teachers practice environmental scanning to renew their resources to keep their design culture up to date and in line with contemporary and societal changes and evolving design professional practices. Design teachers use these resources during conception of the design brief29 and support of students’ creative work. In this paper, we focus on a key part of teachers’ scanning process that involves building and maintaining human networks and relationships. We propose a model of environment segmentation and analyze the structure and fields of design teachers’ networks and the types of resources to which they gives access. Our results present the human-based network renewal modalities and their huge importance. We show that the network, both internal and external, enables teachers to reach complementary, grey and fresh resources, counterpoints, and professional skills that help them to stay up to date throughout their careers.