As teachers become more informed about the affordances of information and communication technologies and take up the new tools in their classrooms, these same technologies are always already informing and reshaping their perceptions and actions in the world. In seizing hold of PowerPoint, a teacher is not only aided, enmeshed, and constrained by the designs of its software script, the teacher is also surrendered to the language, imagery, framing, at-handedness, sensuality, and mediation of its symbolism and materiality. We should not underestimate how new media and educational technologies affect the concrete, subjective, and pre-reflective dimensions of teachers' and students' lifeworlds.