As we seek ways to improve literacy teaching and learning, we need to be careful not to overlook lesson closure as an opportunity to solidify student learning. This Teaching Tip describes the importance of taking time at the ends of lessons, days, and weeks to revisit what students have learned as a means for helping them synthesize and assimilate their understandings. Every lesson ends, but effective lessons do more: they "close"; namely, they bring about a satisfying sense of learning by cycling back to the "what," "why," and "how" of the learning so that students can take away lasting understandings. The author draws on personal experiences and presents an example of the role that student newsletter writing can play in this process.