The purpose of the study was to investigate the effects of two comprehensive argumentative writing interventions--Text Structure Instruction (TSI) and Text Structure Revision Instruction (TSRI)--on the eighth-grade students' ability to compose convincing essays that include structural elements of argumentative discourse. Both treatment groups received explicit text structure instruction in revising argumentative essays. The students in TSRI treatment group were further supported by implementing a free-writing approach during the planning stage and by providing procedural facilitation during the revision stage, whereas the students in TSI treatment group were provided with a traditional planning strategy and a checklist for revising essay. The results indicated that across the conditions, significant increases in the participants. performance from pre-test to post-test were observed on structural elements of argumentative discourse and overall persuasiveness, indicating the effectiveness of both interventions.