This document discusses the roles of teachers and language assistants (LAs) in bilingual classrooms. It describes the typical profile of an LA as a student or recent graduate interested in Spanish and education, with little teaching experience. The duties of teachers include planning lessons, presenting new content, and assessing students, while LAs help with tasks like reviewing materials, translating documents, and giving feedback. The document also covers coordinating LAs' schedules and orientations, as well as co-planning, teaching models, and providing feedback between teachers and LAs.