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With the U. S invasion of P.R. ocurred the first change in the Puerto Rican languages, the introduction of teaching all subjects in English.
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The Commissioner of Education in the Island, Commissioner Brumbaugh, decided that English would be the language of instruction in secondary schools only.
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What puerto ricans calls the Language Law came into effect. The law states that both Spanish and English shall be official languages.
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The re-establishment of English as the primary language in school.
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The Chamber of Deputies approved a bill to make Spanish the language of instruction.
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Spanish was reinstated as the medium of instruction for the first four grade.
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The Language Policy changed to a instruction in Spanish in the first eigth grades.
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Language policy again change to made English the language of instruction in all grades.
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English is established as the oficial language in the secondary schools.
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The first puerto rican governor Luis Muñoz Marín established Spanish as the language of instruction in all grades. One period of English was taught as a second language.
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In 1991 the island legislature voted to replaced Spanish as the sole official language.
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In January 29, 1993, the newly Governor Pedro Rosello changed the existing language law to adopt both English and Spanish as official langauges of Puerto Rico.
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The initiative of Governor Luis Fortuño "Bilingual Generation Program" was created for students from kindergarten through second grade in most public schools of Puerto Rico. His programs aims to graduate a 100 percent English- Spanish bilingual class from secondary school by 2022.