ABSTRACT
The relationship between identity construction and conceptual change is examined in this chapter through a communicational lens. Through this lens, identity construction is seen as an accretion of positioning actions while conceptual change is conceptualized as a meta-level shift in the use of discursive routines. Identity and conceptual change interact in this way through a process of continuous layering and re-layering of positioning actions, identification narratives, and mathematical meta-discursive boundary crossings. This theory is exemplified with a short excerpt of two 9th grade students discussing a proportional reasoning task.
