Theoretically the idea was to use your lecture notes in revision, but I never looked at mine ever again and I suspect that most of my colleagues didn’t either. The purpose of a lecture should not be to impart information. There are books, libraries, nowadays the internet, for that. A lecture should inspire and provoke thought. You watch a good lecturer thinking aloud in front of you, reaching for a thought, sometimes grabbing it out of the air like the celebrated historian A. J. P. Taylor. A good lecturer thinking aloud, reflecting, musing, rephrasing for clarity, hesitating and then grasping, varying the pace, pausing for thought, can be a role model in how to think about a subject and how to transmit a passion for it. If a lecturer drones information as though reading it, the audience might as well read it – possibly in the lecturer’s own book.