Job description. Mi Casita is a Spanish immersion preschool where students are passionate about learning Spanish. Mi Casita is unique in that all classes are taught in Spanish with the goal of our students being fluent in Spanish when they graduate. Mi Casita serves children from the ages of 3 months to 5 years. A Mi Casita preschool teacher: Plans and implements a project-based learning curriculum that promotes the social, physical, cultural, an...