This article deals with school districts' K-8 configurations. Cincinnati, Cleveland, Milwaukee, New York, and Philadelphia are among the districts making the change, driven by a small body of research and a rising pile of anecdotes suggesting that K-8 configurations help academic performance, decrease discipline problems, enhance parent involvement, and save money. The wave of K-8 reorganizations comes as educators, pressured by new federal mandates, are seeking ways to boost student achievement. Most district leaders who favor the K-8 model see it as one part of an overhaul that includes smaller, more personalized schools able to meet the needs of varying age groups with improved curricula and better staff training. In this article, the author discusses what school districts have done regarding the K-8 configurations.