Indiana University of Pennsylvania's (IUP) course catalogue describes English 101: Composition I as a first-year writing course in which students use a variety of resources--including but not limited to memory, observation, critical reading and viewing, analysis, and reflection--and a focus on writing process to create projects in a variety of writing genres. The course design presented here, Composition I - Writing in Wikipedia, takes an innovative approach to learning about writing, rhetoric, and research in that the large majority of work revolves around reading, evaluating, and writing in Wikipedia. To frame this engagement with Wikipedia, we rely on Anne Beaufort's writing knowledge domains, which allow students to become familiar with policies and practices for contributing to the encyclopedia.