A pilot project for three-year-old migrant children was conducted. Its purpose was to design and implement a curriculum for 35 Mexican-American children, ages 3.0 to 3.9, and to evaluate the effect of this curriculum on these children. The program included an extended day care program supervised by two teachers and eight teacher aides. The project was evaluated using a number of measures assessing intellectual development, competency in language skills, cognitive skills, physical skills, and self-concept development. Growth in the area of intellectual competence was reflected by a significant increase on the Leiter International Performance Scale. The check list completed by the teacher on each of the children also reflected growth in the areas of language development, cognitive development, physical development, and self-concept. The data collected on the project reflects the effect of an organized curriculum implemented by teachers and teacher aides and supervised by professional personnel on migrant three-year-old children. (Author/CK)