国际教育成就评价协会（IEA）：PIRLS 2021中的COVID-19研究资源报告（英文版）

On March 11, 2020, the World Health Organization officially declared COVID-19 a global pandemic,1 causing one of the largest disruptions to schooling in history.2 The United Nations reported that 94% of the world’s student population in more than 190 countries experienced school closures due to the pandemic. School closures had a wide-ranging impact on children and adolescents, affecting not only learning but also students’ mental well-being, health, and nutrition.3 The COVID-19 pandemic intr