A common perception in Sweden is that the best teachers do not rely on ready-made teaching materials. The position taken in this paper, building on socio-cultural theory, assumes that teacher materials can support teachers. Although there is an emerging body of research focusing on teachers’ use of teaching materials, cross-cultural studies on this are scarce. The current study addresses this gap by offering unique insight into how a Swedish teacher makes use of teaching materials originally from Finland but slightly adapted to the Swedish context. Based on teacher interviews and classroom observations, I studied how the teacher planned for and enacted lessons. Findings indicate that she fits the material to her preexisting practice and, thus, does not follow the material’s original intentions. The results are compared with previous results on materials and their use, and finally some implications for Swedish mathematics education are presented.