The Two-Way Bilingual Immersion (TWBI) program in PUSD integrates language minority (English Learners) students and language majority (English proficient) students for the purpose of developing bilingualism, bi-literacy, and bi-culturalism.
Instruction is delivered at Kindergarten in Spanish 90% of the day and in English 10%; this gradually shifts until by the 5th grade 50% of the day is spent in each language. At the secondary level, 1/3 of the day is in Spanish and 2/3 is in English.