Common source evaluation tools, such as PATS and CRAAP, help students assess sources of information based on considerations specific to the source itself, such as purpose, authority, timeliness/currency, scope/relevance, and accuracy. What these tools do not consider is the source’s appropriateness within different rhetorical situations. By teaching students to consider a source’s potential appropriateness within different rhetorical contexts (in an opinion paper vs. a research paper, or as a primary vs. a secondary source) we provide students a framework for more meaningful source evaluation and a means by which to articulate how, why, and when sources are used.