Sonia Nieto wrote in her blog:

No matter how one feels about bilingual education – some see it as a scourge while others see it as redemption– the truth is that research is clear that when students speak a language other than English, and when that language is firmly established and developed, it is an asset to learning English (for a review of this literature, see Chapter 7 in Nieto & Bode, 2008, below). Even more important, research has also found that students who are bilingual (rather than those who are fluent in neither language, or those who begin as fluent speakers of one language and become fluent speakers of English while losing their native language) have a much better track record in terms of academic achievement, high school graduation, and even mental health (see Portes & Rumbaut, 2006).

LeadCast Blog – LeadScape

Why do we continue to dismiss native languages?