My research aims to uncover the complex mechanisms behind the cognitive and attitudinal aptitudes of schooled teenagers to understand and tackle global issues. This will be through three interlinked studies analysing new Programme for International Student Assessment (PISA) 2018 data on Global Competence (GC) assessments with a combination of Multilevel Modelling and Structural Equation Modelling. Each study will address a specific issue: (1) the relationships between GC with student and school characteristics, (2) the role of student wellbeing and school climate measures in determining GC, (3) the impact of including global issues in national policies and school curriculums on GC.