The document discusses the importance of closure in teaching. It defines closure as indispensable for ensuring lessons have their full effect on learners. There are three types of closure: instructional closure occurs when the teacher links new knowledge to past knowledge; cognitive closure is reached when students make this link themselves; and social closure gives students a sense of achievement and encouragement. The document outlines several ways to achieve good closure, such as linking lessons to objectives and familiar concepts, reviewing and summarizing key points, providing follow-up resources, and evaluating student learning through questions and activities.