Primary: Why did the Spanish language get integrated into schools in the United States?

While researching more about this question, I came upon some articles from that period when Spanish was integrated into schools. In a newspaper article titled, Bilingual classes aid Mexican-Americans, Armando Rodriguez, chief of the Mexican-American Affairs Unit in the U.S. Office of Education explained "Bilingual education, means teaching the child educational concepts in all phases of the curriculum in his mother tongue while he is learning English." This was significant to my question since it explained how they don't want to teach Spanish as well as English in schools but rather help students learn English by explaining to them in Spanish. I think this is very important since it actually helps the students understand what they are learning rather then just spiting out information to them which they have to memorize but can't learn. This article also explains the main three reasons why bilingual schooling is important. First is so spanish students don't dropout. Second is so they don't fail the curriculum. Third is so they can hire more teachers which can properly communicate with the students. I find these important in the future of the country. 
In another article titled, How to Tame a Wild Tongue, the Gloria Anzaldua talks about her childhood and how she was punished for speaking in Spanish. She explains how, " I remember being sent to the corner of the classroom for "talking back" to the Anglo teacher when all I was trying to do was tell her how to pronounce my name. "If you want to be American, speak 'American'. If you don't like it, go back to Mexico where you belong." I found this shocking how she got in trouble for being herself. This is a good example of why schools needed to be integrated with Spanish, so discrimination like this doesn't happen.