In its fifth year of operation, the project served about 2,000 students in the Philadelphia public schools. The three components of the project are: (1) Model A, providing bilingual education from prekindergarten to fifth grade, (2) Model B, parallel in pattern to Model A but serving grades 1-4 and grade 2 at othe schools, and (3) Arriba, designed to serve new arrivals to the mainland, mostly Spanish-dominant, in grades 3 through 12 in nine schools. The report describes the needs of the environment, the objectives and organization of the project and the modifications instituted in the fifth year. Testing and management problems are examined. Materials completed in 1973-74 are listed and a financial analysis is given. Statistical tables and graphs reflecting language and reading performance, self-esteem and readiness of pupils, and parental support, with an evaluation for each section, make up the bulk of the report. A cumulative abstract for the five years shows that the "Let's Be Amigos" program has improved performance of both English- and Spanish-dominant pupils in their mother tongues. Growth has occurred in second languages as well but has not been as rapid as anticipated by program planners. A bibliography is appended. (TL)