This dissertation is a synthesizing document of a body of research addressing the theme of teachers' practices and teacher education related to the integration of new technologies into school mathematics. Building on the general theoretical frame of the Double Approach, the diverse research studies presented in this document go further and provide theoretical constructs more adapted to the issue of ICT integration. The first area investigated is that of ordinary practice of mathematics teaching with technologies. The synthesis identifies common characteristics related to this use, analyzes certain regularities in teaching practices and investigates the factors that determine them. A first analytic framework is thus developed emphasizing thr...