My favourite and an excellent idea for an exit pass:
One Word: If it seems a lecture is the only way to discuss a topic, preface it by telling students that at the end of the day’s lesson, they must write down a single word they believe best represents the lesson. Then, they can expand on why they chose that word with a separate paragraph. This will force active listening during the class period, as students will need to be able to condense an entire lesson into the essence of its idea.
Another idea is to ask students to write a slogan-like bumper sticker to illustrate a particular concept from the lecture—forcing them to sum up the entire class period in one sentence.