Measurement systems give colleges a structure for collecting, sharing, and acting on data. The guidebook and tools presented here help faculty, staff, college leadership, and policymakers understand and use measurement systems--and specifically use data to improve completion rates, close institutional performance gaps, and facilitate economic mobility for historically excluded students. This report lists four cornerstones to strong measurement systems: (1) measure what matters; (2) source the data your college needs; (3) use the national student clearing house PDP; and (4) have regular conversations about data.