As the founder, and current Director of Admissions, of Escuela Bilingüe Internacional, a pre-kinder through 8th grade school in Oakland, California, I am frequently asked by worried, monolingual, English-speaking parents if their child will suffer emotional stress by being immersed in the Spanish language all day. Will my child feel welcome and understood? Will they be anxious when they aren't able to understand the teacher? What if my child is confused? Maybe my child will spend the year learning Spanish but won't learn anything else. What about content, like literacy, math and science?...