The Programme for International Student Assessment (PISA) is a triennial international survey that evaluates Education systems. Once a country is approved for participation by Pisa, individual schools are chosen based on stringent criteria to represent all 15 year-olds in that country. In 2015, over half a million 15-year-olds in 72 countries and economies took the two-hour test. Students were assessed in science, mathematics, reading, collaborative problem solving and financial literacy, although the major emphasis of the 2015 test was science literacy. The results were published today.

Read more