translation: [22: The OECD is responsible for the Programme for International Students Assessment (PISA) which is a triennial survey of 15-year-old students around the world.
translation: L-OECD hija responsabbli għall-Programm għall-Valutazzjoni Internazzjonali tal-Istudenti (PISA), li huwa stħarriġ triennali ta' studenti ta' 15-il sena madwar id-dinja.