Classroom discussion constitutes a unique opportunity for student deliberation and is often believed to be a desirable attribute of Social Science teaching. Yet, despite its potential, large scale observational research on discussion in Nordic classrooms is scarce. To address this shortcoming, the present study investigated the prevalence and contexts of classroom discussion in a Nordic sample of 375 teaching segments (each lasting 15 min). The sample was gathered through video observations, and discussion was measured by an element from the Protocol (...) for Language Arts Teaching Observations. Discussion was present in 39.2% of the investigated segments but was very unequally distributed across classes. While this study found classroom discussion to be most likely during small group work, in the middle of a 45-min lesson, and in schools with high achieving students, more research is needed to determine the sources of inequality in social science students’ opportunities for classroom deliberation. (shrink)