[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.
[22: ESAO ir atbildīga par Starptautisko studentu novērtēšanas programmu (SSNP), kas ir reizi trīs gados veikta aptauja, kurā piedalās 15 gadus veci studenti visā pasaulē.