The Ainsworth School Spanish Partial Immersion Program (Portland, Oregon) was established in 1987 to provide an elementary foreign language magnet program to children in the district. The program's major goals are bilingual proficiency and increased understanding of the second language culture. During 1989-1990, the program enrolled 205 students in kindergarten through grade 3. Students were taught mathematics, social studies, and some language arts in Spanish for half the day and were taught reading, language arts, and science in English during the other half. Participating students made normal progress in achieving district curricular objectives and in developing skills in understanding, speaking, reading, and writing Spanish. Student achievement exceeded the district average in reading, mathematics, and language usage by grade 3. The initial lag in first language skills was short-lived. The program appears to have stimulated basic skills development, especially in mathematics. Parent interviews suggest that the program sustained parent involvement. Program continuation and expansion are recommended, with six specific additional recommendations for curriculum refinement, student monitoring, improved Spanish language objectives and assessment, maintaining student diversity, and participant tracking. A sample class curriculum schedule, parent questionnaire, and summary of parent questionnaire responses are appended. (MSE)