This article suggests a method for determining and depicting language dominance through the use of parallel tests of aural ability in two languages. In addition, the use of a two-dimensional graph consisting of the proficiency levels within each language appears fruitful as a means of depicting such dominance scores in the initial placement of pupils into instructional groupings. However, the complexity of human behavior across a dual language matrix as well as the limitations of brief group testing preclude anything more than a tentative judgment with respect to any pupil's language dominance, which should be verified by subsequent diagnostic testing and prescriptive teaching. Given the restricted resources of the typical educational setting, the circumspect use of such a method offers a simple and systematic starting point for pupil placement and programmatic progress. (Author/SK)