This paper aims at pointing out and discussing elements of the technological imaginary experienced by teachers and analyze its implications on teaching practices and on the relationships that teachers establish with the students in a digital culture. It also attempts to grasp the teachers conception of how their profession supposedly has been changing in face of a massification of the access to technology and digital Medias. This dissertation has as its main theoretical foundation Digital Culture and the myth of digital culture theories and their contribution to understanding the Technological Imaginary. These theories are placed among philosophically oriented Media studies, which belong to a postmetaphysical perspective. The empirical research consisted of semi-structured interviews with 15 high school teachers in Rio de Janeiro, mostly from State Schools where high school students are granted a license to be a Junior School teacher. Results suggest that the Technological Imaginary shared by these professionals includes the myth of digital culture, which in turn implies a belief that there is a greater distance between generations in the context of a digital culture and that the young master the new media technologies, whereas adults have little understanding of them. The study also discovered that the teachers use technologies to engage in social use more frequently than for pedagogical purposes. Even beyond the poor infrastructure of schools, little instruction in the use of technologies and lack of viable time to implement such resources in their range of teaching practices, this Technological Imaginary seems to be a factor in the low use of technologies in classrooms.