Hi Lisa!
Sometimes, as a short activity, I have had students in a learning group take a topic or portion of the lecture or presentation and then re-present it, as a team, in their own way - it's amazing what students will come up with - a paraphrase, examples of their own, an activity for the whole class, a role play, skit, demonstration or application. Yes, it takes more time, but it can be an effective way to help ensure that more students comprehend and can apply the subject-at-hand.
Thanks for your comments,
Jay Hollowell
ED106 Facilitator