In the summer of 1985, New York City's High School Preparation for Raising Educational Performance (PREP) Program included an English as a second language (ELS) component. The ESL component was designed to help recent immigrant students develop the listening, speaking, reading, and writing skills in English necessary for success in the mainstream and to introduce students to high school requirements and expectations. Funding for ESL Summer PREP was provided by the Emergency Immigrant Education Assistance Program and was offered to all incoming immigrant limited English proficiency (LEP) students, as well as LEP students who were enrolled in a high school bilingual or ESL program. An innovative feature of ESL Summer PREP was the teaching of basic skills in the context of themes. Developmental instruction was offered integrating specific themes into school-wide activities. Additional components of Summer PREP included theme-related field trips and guidance counseling. The 1985 Summer PREP program instituted a number of program modifications to improve overall organization, services to students, and goal attainment based on the 1984 evaluation report. The results of the 1985 evaluation indicated that the ESL component was well organized. Students appeared to learn a great deal, and staff members appeared to be committed and dynamic. The results also indicated that most program modifications were effective. (KH)