The document discusses the role of textbooks in language teaching and provides guidance on evaluating textbooks. It notes that textbooks can serve as a framework, provide ready-made materials, and offer support and guidance to teachers. However, textbooks also have limitations and may not fully meet the needs of every teaching situation. The document recommends that teachers supplement textbooks as needed and consider factors like objectives, teaching styles, and student needs when evaluating textbooks. It also presents checklists teachers can use to systematically evaluate textbooks.