Research questions addressed whether (1) the instruction was effective, (2) performance on persuasive tasks differed by grade level following instruction, (3) performance on persuasive tasks differed by Piagetian developmental level following instruction, and (4) whether performance differed between monolingual and bilingual subjects. Students wrote four persuasive compositions for assessment, two before instruction was administered and two after instruction. Knudson's holistic scoring rubric was used to evaluate essays for overall quality. Other measures of writing were evaluated including the number of words students used in their writing, the number of reasons included in the essay, the number of reasons per hundred words, and whether the paper had a conclusion or not. Further, the number of elaborations used in the paper was determined, as well as the number of elaborations per hundred words, and the ratio of the number of words used in elaborations compared with the total number of words in the composition.