A rise in data availability gives educators the opportunity to tailor instructional practices and interventions to student needs and invest resources in areas where students require the most support. Massachusetts developed the Early Warning Indicator System (EWIS), which synthesizes the wealth of student data available in the state, including assessment scores, attendance rates, course grades, and other measures to support educators in identifying struggling students. EWIS allows educators to influence a student's academic trajectory by supporting early intervention for students in need. This document provides a summary of the Early Warning Indicator System, highlighting the EWIS theory of change and the process of turning data into action by engaging in pattern analysis.