Four types of geometric configurations used in illustrating bilingual education plans are described. The first type and one of the earliest consisted of a matrix form with horizontal/vertical columns. Three instructional designs based on this figure are a full-immersion approach, a dual language transitional plan, and a third plan in which the first language is phased out as an instructional medium. A second configuration, also based on a matrix design, differs from the first in that models using it represent a process toward bilingual maintenance. A third design depicts a partial bilingual model in grades K-1, with an English full-immersion plan in grades 2-6. The 2-6 component provides for more advanced instruction in English as a second language. Another model based on the same configuration provides for a continuous expansion of bilingual education in the school system. The fourth design is a concentric circular design, which shows the inclusion of two languages, several curricular areas and suggested instructional themes. The latter plans offer ideas for teachers to use in applying both a humanistic and a cognitive approach in furthering the education of bilingual-bicultural students. (AMH)