This is an evaluation of a Title VII bilingual program that was conducted at Thomas Jefferson High School in Brooklyn, New York, in 1979-1980 to serve Spanish speaking students. The goal of the program was to facilitate their transition to mainstream classes. The evaluation provides a demographic context, information on student characteristics, and a program description. Instructional components discussed include: (1) programming and mainstreaming; (2) funding; (3) bilingual classes; and (4) English as a second language classes. Non-instructional components covered include: (1) curriculum and materials development; (2) supportive services; (3) staff development; and (4) parental and community involvement. Tables show students' performance on the Criterion Referenced English Syntax Test and achievement in mathematics, social studies, science, native language arts, native language mathematics, and Spanish language. Attendance rates are given and conclusions and recommendations are offered. (APM)