PISA global survey: Investing in teachers and education systems helped mitigate the impact of Covid
Delayed by a year because of Covid, the OECD’s PISA is back, with a major focus on the impact of the pandemic on schools. Used as a benchmark by governments to evaluate their education systems, this latest version of PISA , the Program for International Student Assessment, is the most comprehensive yet with 81 countries taking part, the majority nations outside the OECD.