This study proceeds from the assumption that computers do not function as independent variables in classrooms, but rather as part of a complex network of social and pedagogical interactions. It examines the integration of computers into the writing practices of a remedial English class in an urban high school. Computers and word processors were introduced midway into the school year. The class was observed and recorded daily throughout the academic year, and all written work was collected. Six students were selected for in-depth focus as they carried out writing tasks. Analysis focuses on how classroom writing practices were structured and carried out and how students participated in writing tasks before and after the computers arrived. Although many changes accompanied the use of computers, the study concludes that the teacher's structuring of writing instruction had the greatest impact on both student writing and the ways computers entered into that writing.