This paper aims at exploring the roles preschool teachers give technologies in mathematics education and the ways they structure their mathematics learning activities using interactive whiteboard (IWB) as a technological artefact. Data collected from observations of three preschool teachers embedding IWB in a preschool practice in Sweden provided the primary data sources. The findings suggest that the use of IWB in preschool can be viewed as "Multisensory resources to engage young children's reasoning", "Challenging young children to engage in problem-solving activities" and "Taking the child's interest as a point of departure". This study also highlights the importance of preschool teachers' pedagogical and technological knowledge that shape and mediate the ways they embed IWB in preschool pedagogical practices.