Computer technology is expanding our profession's conception of composing, allowing visual information to play a substantial role in an increasing variety of composition assignments. This expansion, however, creates a major problem: How does one assess student work on these assignments? Current work in assessment provides only partial answers to this question. Consequently, this article will review current theory and practice in assessment, noting its limitations as well as its strengths. The article will then draw on work in both verbal and visual communication to explain an integrative approach to assessment, one that allows instructors to consider students' work with visuals without losing sight of conventional goals of a "writing" course. The article concludes by illustrating this approach with an analysis of an unconventional student text--a T-shirt--that students submitted as the final assignment for a relatively conventional writing course. (Contains 2 figures.)