While there is a body of research concerning the education of students with migrant or refugee backgrounds, little of this research focuses on primary school-aged children. In order to address this gap, the current paper utilises data gained from an ethnographic study to consider the challenges and opportunities associated with diverse classrooms designed for students learning English, in which students come from a complex range of backgrounds and may have experienced trauma. The paper provides support for sociocultural learning approaches, whereby students' own cultural and linguistic background are treated as beneficial to education rather than as obstacles to be overcome.