The paper focuses on the features of embodiment configurations when using the virtual world in the classroom. The context is a secondary school (students aged 11-15) adopting an educational immersive 3D virtual world. We conducted participant observation, collecting video-audio records supported by a student focus group and teachers' interviews. The analytical framework of this paper draws on the iterative interaction of the complex arrangement of bodies and objects in physical and virtual settings. Our results highlight the dynamic ways in which the arrangement of bodies and material acted as a mediational means between real and virtual settings.