This document provides guidance on using data in school improvement efforts. It discusses the importance of a continuous school improvement cycle of planning, implementing, studying, and acting based on data. It also outlines essential aspects of using data such as developing a leadership team, collecting different types of data including achievement, demographic, program, and perception data, analyzing data patterns, generating hypotheses, setting goals, designing strategies, defining evaluation criteria, and making a commitment to data-driven decision making. The goal is to introduce foundational knowledge on incorporating data into the school improvement process.