Two years ago, Dr. Steven Adamowski, Superintendent of Norwalk Public Schools, challenged his leadership team to make sure that Norwalk's assessment system effectively supported efforts "to raise the bar and close the gaps" for all students. Dr. Michael Conner, Chief Academic Officer, and Diane Filardo, Director of Assessment Accountability, conducted a comprehensive audit of the existing system and found that far too many assessments were not providing teachers and school leaders with quality data that could inform decision-making. They needed a better way to measure student progress and growth. Norwalk knew NWEA™ could provide this kind of data. What they didn't expect was that implementing MAP® Growth™ would enable them to drastically reduce the number of other assessments the district needed to use. This brief case study describes how Norwalk took a closer look at the existing assessment system, implemented this new approach to assessment, and aligned assessments to district priorities.