The Las Cruces Elementary School Bilingual Program, designed to increase achievement levels of K-6 pupils, is located in 2 elementary schools through support from titles III and VII of the Elementary and Secondary Education Act. The project emphasizes the cultural and linguistic heritage of the Las Cruces, New Mexico, area; the structure of the Spanish and English languages; bilingual-bicultural interaction; and the establishment of optimal learning climates in school, home, and community. The experimental design includes the following program components: (1) affective learning environment, (2) culturally centered curriculum, (3) Spanish-English instruction, (4) language experience and individualized reading, (5) differentiated staffing and team teaching, (6) bilingual aides, (7) career-training opportunities, (8) parental involvement, and (9) teacher in-service training. The research design provides data for measuring pupil self-concept, intellectual gain, and academic achievement. Measures of parent participation and attitude toward education are also included. Behavioral objectives are identified, along with the instructional procedures needed to ensure measurable products. (Author/LS)