International audienceThe questions raised by the integration of technologies by mathematics teachers are complex. Various theoretical frames enlighten various facets, and coordinations between frames are necessary to progress in the understanding of this research object. It is the aim we pursue in this article. We retain two approaches: the double approach didactic and ergonomic of the teaching practices and the documentational approach of didactics. We present these approaches, and illustrate their implementation on two case studies. We discuss their similarities, their differences, and the possible articulations between these perspectives. This constrasted reflection brings a theoretical progress, but also contributes to a better underst...