A bilingual, bicultural program in the Edgewood Independent School District in San Antonio, Texas, part of the Experimental Schools Program, was designed to reverse "negative self concept, motivation, and attitudes" of its Mexican American students, and by so doing, improve their academic achievement. Efforts were employed to: (1) acquire more Mexican American teachers; (2) use Spanish as a language of instruction and classroom management; (3) develop/adapt Mexican American and local content materials; and (4) increase individualized instruction. Evaluation of the program was conducted during a four-year period, and included both cross sectional analyses within each of the years and longitudinal analyses across the four for experimental and comparison students. No major differences were revealed between the groups at the beginning of the testing period. Mexican American students were found to be at or above the norm in self concept and attitudes, somewhat below the norm in motivation for some years in which they were measured, and below the norm in achievement every year. Few significant effects of the program in improving the students' affect and their had not been efficacious in promoting either the psychosocial had not been efficacious in promoting either the psychosicial or cognitive growth of the students. (Author/JD)