A multiple baseline design investigated the effects of computer graphic organizers on the persuasive composition writing skills of four Hispanic students with specific learning disabilities. Participants reviewed the elements of persuasive writing and then developed compositions using a word processing program. Baseline planning was done with a paper and pencil, while intervention planning was done using a computer graphic organizer program. With variation, the use of computer graphic organizers during planning resulted in an increase in the total number of words written, time spent planning, number of supporting details planned, percentage of planned supporting details transferred to the composition, and syntactical maturity as measured by the number of T-units. Also observed was an improvement in the overall organization of the compositions as measured by an analytical scoring guide or rubric. (Contains 1 table and 6 figures.)