This study uses a bounded case to investigate how students engage in historical inquiry using digital historical sources. Drawing on research and theory related to historical thinking, digital history and new literacies, this study explores how students located historical documents in an online archive and then analyzed those documents given online access to related historical information. Historical thinking deals with how expert historians can engage in the development of historical synthesis, as well as how students can learn to analyze historical sources. Key concepts include summarizing, contextualizing and corroboration (Barton, 2005; Wineburg, 1991; Wineburg, 2001). Digital history research examines how the digitization of historical materials can influence access of historical materials and presentation of historical analysis (Ayers, 1999; McClurkin & Slezak, 2006). New literacies explores how new technologies influence the process of finding and using information, and has important implications for the use of digital history archives in the classroom. Particularly, students need to understand how to navigate online archives, switch between various roles and tasks during the inquiry process (New London Group, 1996; Leu, 2001). The key findings from this research are that students struggled with document selection, were unable to make efficient use of information from the Web, and had difficulty integrating disconfirming evidence into their answer to the historical inquiry question. This study reveals that there are missing pieces to the puzzle of how students engage in historical inquiry using digital historical sources. The findings of this study suggest that the process of locating and analyzing digital historical sources is complex and students need specialized support when searching for documents and when locating and using related online information. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]