Bilingual School Organization (BISO) schools offer a school-wide dual language program model. This program serves students in developing their bilingual and bi-literate proficiency in English and Spanish. BISO schools follow an instructional schedule where 60% of the day is devoted to instruction in or through English and 40% of the day is devoted to instruction in or through the language other than English. The time for instruction in the several areas of study follows the norms established for all elementary schools with the addition of sixty minutes daily for language arts in the language other than English. Instruction in the curriculum content areas is delivered in or through both languages. Upper academy students at K-8 Centers and middle school students pursue language and literature courses in Spanish and take an additional course of Humanities instructed in Spanish.