Our daily life is pervaded by the use of digital information and communication technology, a fact that also takes place in the education arena. The design teaching activity has absorbed a series of computerized resources in recent decades. The recognition that the Design field has an ideological character makes us think about how designers perform in society. This research is situated at the intersection of technological issues as applied to education with the ideological character of the design activity. Aiming at contributing to the understanding of multiple possibilities of designers performance in society, this study raises the subjective dimensions of the teaching and learning activities through technological mediation. The question of the extent to which teachers make use of Design subjective dimensions arising from the use of digital technologies permeates the whole research. The teaching and learning practices observation took place in Design undergraduate classes at PUC-Rio, in which a triadic relationship between teachers, students and digital technologies happened. The field research was based on the principles of qualitative research and participant observation. The interactional sociolinguistics approach was also used in order to help the interpretation process of collected data. The question of subjectivity – understood as collective, polyphonic and heterogeneous – is based on Guattari and permeates and underlies the whole study. In this research, Heidegger and Simondon are authors who bring basic concepts for the understanding of the relationship between man and technique. It has been verified, among other observations, that the use of digital information and communication technology in the pedagogical context proved to be a significant expression of the Design field as well as a representation of the field itself.