bullets13 - My comments aren't meant to be critical of you personally nor teachers in general. As you say, your job is to ensure all your students learn. My criticism is of parents not properly preparing their kids for school and life in the culture in which they live and of a system that, IMO, accepts and enables that lack of preparation.
I'd like to know more about the bilingual teachers and aides. Would this ability make an applicant for a position more desirable than one who, while not bilingual, is stronger in most other areas? Does the school district pay for teachers to learn Spanish if they don't teach a Spanish class?