A materialist rhetoric in service learning is needed to teach students how to "discover" the arguments that already exist in the communities they wish to serve; "analyze" the effectiveness of those arguments; collaboratively "produce" viable alternatives with community partners; and "assess" the impact of their interventions. Through a discussion of a project that attempted but failed to increase parent involvement in Chicago's public schools, this article shows why rhetorical production needs to be supported by the kind of rhetorical analysis that reveals how institutions exercise power. Materialist rhetoric challenges students, teachers, and community partners to write for social change "and" define "change" concretely, in terms of institutional practices or policies that they wish to influence. (Contains 3 figures and 9 notes.)