In this paper, I present an approach to mixed methods research based on Andrew Pickering's performative view of research. I compare this approach to three existing approaches: incompatible worlds, critical realism, and pragmatism. According to my performative view, multiple realities exist, which can be known in various ways. Researchers create…

Many key aspects of modern theory relating to classroom discourse in mathematics education, especially the theory of didactical situations, have not progressed much further than theories put forward in the 1840s by the North American educator David Page. Aspects of Brousseau's (1997) description of what he called the Topaze effect, are remarkably…