A persisting gap in the field of disciplinary literacy is lack of conceptual clarity around the term discipline. In this theoretical article, the author explains some concerns with existing definitional imprecision and argues that genre-oriented activity theory offers a way to reconceptualize the focus of disciplinary literacy, especially in relation to academic, professional, and other literacies. The author provides an overview of Rhetorical Genre Studies, focusing on a genre-oriented activity theory model from David Russell, to demonstrate how genres within activity might be used to productively reframe some of the scholarship of disciplinary literacies. Specifically, the notion of genres as recurrent mediating tools used within multilayered, laminated activity systems may offer a more complex frame for exploring disciplinary literacies. The author offers a brief review of previous disciplinary literacy research to show how the field might benefit by incorporating a genre-oriented approach and closes with research questions for future study. I n his Richard Braddock Award-winning article, "Ways of Knowing, Doing, and Writing in the Disciplines," Carter (2007) analyzed undergraduate program outcomes at the college level and proposed four metadisciplines, each oriented around a shared motive such as problem solving, empirical inquiry, research from sources, or performance. He viewed these metadisciplines as overarching structures stretching across individual disciplines. Surprisingly, Carter (2007) suggested that the field of writing/ composition, as a member of the performance-oriented metadiscipline, was closer to dance performance than to literary analysis in terms of many of its central values and assumptions. Yet, within most school settings, writing is generally housed in the same unit as literature, often within English language arts departments (at the K-12 level) or within departments of English (at the college level). Thus, Carter's approach to categorization breaks open some traditional assumptions about the relations between disciplines and school-based subject areas, as well as relations among disciplines.More significantly, Carter's (2007) work can be used to illuminate a continuing gap in disciplinary literacy scholarship and pedagogy: the lack of definitional clarity around the notion of discipline. Although he proposed structures even larger than disciplines that