This study sought to determine whether insular Puerto Ricans given English language training prior to taking the tests of the Army Classification Battery (ACB) show higher measured potential than those who take the tests before receiving the special English language training. ACB test scores were obtained on two samples of insular Puerto Ricans, one (100 men) tested before a six-week course of English language training and the other (153 men) tested on completion of English language training. No men were tested both before and after language training. Results indicate that the six-week language training program yielded only modest increases in the literacy skills of insular Puerto Ricans and that more definite research would be required to determine the effectiveness of English language training. (Two tables of findings are included.) (JM)