In spite of the existence of important theoretical production and diversity of methodological proposals, the formation in the field of teaching technologies keeps questioning us what is important to teach and to learn. There is still confusion about the didactic scheme, meaning the relation between teachers and their way of teaching with the equipment used in the teaching-learning proceses. In this confusion, training in Educational Technology oscillates like a pendulum, from instruments to the conceptualizations, from theorizing to the techniques, being still difficult to find a balance in teacher education. This article aims to reflect on what we believe is hidden in this didactic scheme, we refer to the relationship between the techniques, society and its ability to operate with knowledge.