The aim of this study is to examine whether mini whiteboards can counteract the culture of silence that prevails in some classrooms. The focus is on seeing if the use of the mathematics didactic tool, mini whiteboard, can be used as part of activating the students to participate and contribute to a more dialogic teaching. The results are analyzed from the sociocultural perspective with a focus on mediating tools, dialogue and interaction. The results of this study show that teachers use the mini whiteboard in different ways. One method is to let students work in pairs to discuss issues together. Another method is to create a classroom where the students learn from each other. Teachers experience the mini whiteboard in different ways. They believe that it can contribute to learning but have a shared meaning. In a way, it can be used to create more dialogue and thus develop learning. Another technique is to use the tool to make the pupils more confident, which in a way develops learning. The results show an increased participation in the classes. Most students agree that the mini whiteboard is a positive tool that helps them to show their knowledge without feeling pressured. The students appreciate that the whiteboard contributes to them receiving direct feedback and can thus feel safe in further discussions.