The issue of coverage is a constant concern and a common frustration for everyone in higher education. There is never enough time. Teaching Assistant Douglas Modde of the history department suggests that you rank the day's material into key ideas and less important material. If you get through the key ideas, you won't feel so frustrated about running out of time. Closure is a valuable part of a session.
Closure involves summarizing the main points of the lesson or part of a lesson.
Closure is complementary to the introduction of a lesson, but it is not a mirror image. Presumably, students have learned something during the lesson. Hence, during closure, you should seek to formulate the main points of the lesson, in summary form, whether these points have been made by you or by students. It may include the degree to which objectives have been achieved or content covered. Closure may be verbal or it may take place utilizing an overhead.