Subject matter knowledge influences instructional decision-making, particularly for novice teachers. Moreover, teacher candidates’ abilities to create critical pedagogy is influenced by their subject matter knowledge and their opportunity to interact with critical curriculum. Using a researcher-designed task intended to develop teacher candidates’ subject matter knowledge, this qualitative action research study investigated the degree to which the task supported candidates’ critical consciousness and their selection and framing of content for an instructional unit. The findings illustrate inconsistencies in candidates’ abilities to use (...) new subject matter knowledge in ways that conceptualize social studies curriculum in critical ways. These inconsistencies suggest that teacher educators should consider using a critical rationale-based pedagogy as a means to assist teacher candidates to move towards critical pedagogy in ways that subject matter knowledge alone cannot. (shrink)