The aim of this thesis was to use qualitative approaches to show how teachers in primary school reason on their way to meet and communicate with children who have ADHD (Attention-Deficit/Hyperactivity Disorder). Research questions of the study were as follows: How does teachers in primary school reason about their way to communicate with children with ADHD? Do the teachers use some specific methods or means of communication with students who have ADHD? Do the teachers reason about their way how to handle conflicts with students who have ADHD? I collected my empirical material through a qualitative interview method. My theoretical starting points were interaction theory and the socio-cultural perspective. I have used these theories to analyze my material. The material has also been analyzed and set against previous research on children with ADHD, and against the background. The results show that all of the informants believe that communication and to build relationships with children who have ADHD have a significant role in these children to get a good education. The result shows that work with children who have ADHD are complex and constantly need to be evaluated and developed for the individual.