Editorial article for the special issue on data-based decision making around the world: From policy to practice to results

This editorial article briefly examines the importance of data-based decision making. It discusses the definition as well as rationale for data-based decision making, its purposes, the use of data at different levels of the educational system, and possible promoting and hindering factors of effective data use. It also examines the effects of data use, intended effects (e.g., increased student achievement), as well as unintended consequences (e.g., cheating with tests). We end with suggestions for new research prioritie