This document outlines a multi-phase, international study on the relationship between school autonomy and student learning. The study will examine how school autonomy structures and cultures influence leadership practices around curriculum and learning across six different education systems. In Phase 1, researchers will synthesize existing evidence and examine approaches to school-based management, curriculum reform, and 21st century skills in each system. Phase 2 will involve in-depth case studies of high-performing schools in the six countries. Phase 3 will use large-scale surveys to test which autonomy practices are effective system-wide. Finally, Phase 4 will focus on teacher professional development for 21st century skills. The goal is to contribute to the understanding of how school autonomy can help adapt education to