Abstract: | This article examines the relationship between epistemic cognition and classroom argumentation practices in elementary science and history. Literature highlights argumentation as a critical epistemic practice for science and history learning (Duschl & J. Osborne, 2002; National Research Council, 2007, 2012). Although there is ample support for argumentation in the teaching of history and science, the specific epistemic issues that students address through this practice are not always empirically documented. We draw on the work of Chinn, Buckland, and Samarapungavan (2011 Chinn, C. A., Buckland, L. A. and Samarapungavan, A. 2011. Expanding the dimensions of epistemic cognition: Arguments from philosophy and psychology. Educational Psychologist, 46(3): 141–167. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) to examine argumentation practices in science and history in 2 fifth-grade and 2 sixth-grade urban classrooms. Students' and teachers' emergent argumentation practices were coded and analyzed and epistemic reasoning was examined using the 5 components of the Chinn et al. model. Findings highlight that students engaged in complex argumentation practices that were consistent across classrooms. The classroom case examples demonstrate that students addressed all 5 epistemic components in the Chinn et al. model through their argumentation practice. Further research to better understand the relationship between teacher epistemic commitments, pedagogical practices, and student epistemic commitments and learning is suggested. |