This evaluation report is of a pre-school and primary grades bilingual program that was begun in 1971 as a demonstration model uniquely designed to meet the needs of children in migrant farm worker families. In order to overcome some of the disadvantages migrant children face due to frequent moves, parallel educational programs were set up in Washington state and in a border community in Texas, which was the home base for many of the migrants coming into Washington. Distinctive features of the program were the use of bilingual persons from the migrant community as teachers and the flexibility of the program in that it allowed for small group and individual instruction. The report covers the following: (1) program description; (2) evaluation of instructional components (preschool concepts, handwriting, Spanish and English vocabulary development, mathematics, English and Spanish reading, and cultural concepts); (3) special studies on improvement of oral language skills, and a comparison of effects of bilingual instruction in north and south Texas; (4) a follow-up study on upper grade level performance of children who have finished the special bilingual program; and (5) evaluations of staff development, parent/community involvement, materials development, and dissemination. (AMH)