This article proposes a taxonomy of methodologies to understand how knowledge is--and can be--made in the complex context of writing centers. The authors found it to be a powerful tool to generate critical thinking, helping to classify, critique, and retrieve knowledge. Likewise, they believe it can serve various audiences. For example, those experienced in writing center research may find the taxonomy affirming as they recognize their methodologies of preference or perhaps challenging as they consider how alternative methodologies might be used to investigate their research interests from other perspectives. Graduate students and those beginning careers in writing centers may use it to explore the variety of methodologies they might employ as researchers and to categorize and critique the studies they read. The taxonomy is not meant to pigeonhole research or to privilege one methodology over another. Rather, the authors offer it as a way to extend the conversation regarding research methodologies and epistemological debates. (Contains 2 figures and 4 notes.)