It is 10 minutes before the end of class, and the mass of 375 students is beginning to get restless. Ballpoint pens retract, papers rustle, notebooks close, and book-bag zippers swoosh together. These disturbances, minor at first, ripple quickly across the room signaling that class is over and nothing else of consequence will occur. You envision quite a different conclusion for the 50-minute class. The final 10 minutes are for summarizing, showing relevance and connection to other course topics and answering questions that your passionate and enthusiastic presentation generated in the active minds of your students.