Estonia is currently finalising its new Education Strategy 2035, a horizon that goes beyond strict education performance and encompasses the knowledge, skills and attitudes for people to thrive in the 21st century. To achieve the ambitious goals set in the strategy, Estonia requested support from the European Commission, under the Structural Reform Support Programme, in the area of education monitoring and data-informed decision making. This Policy Perspective presents the final output of this two-year collaboration between the Estonian Ministry of Education and Research, the European Commission, and the OECD. The overall goal of this project is to support the Estonian Government in strengthening data-informed decision making in education through improvements to its education monitoring system. After reviewing comprehensively the existing data and monitoring processes in Estonia, the OECD has prepared guidelines for education monitoring and a coherent set of indicators to support the achievement of the goals set in the Estonian Education Strategy 2035. The report will be valuable not only for Estonia, but also to the many countries that are looking to strengthen monitoring practices, select relevant indicators, and promote data-informed decision making at every governance level to steer school improvement.