The COVID-19 pandemic disrupted education worldwide as educational systems made the decision to close schools to contain the spread of the virus. The duration of school closures varied greatly internationally. In this study, we use representative trend data from more than 300,000 students in 29 countries to examine whether the cross-country…

Policies about reducing class size have been implemented in the US and Europe in the past decades. Only a few studies have discussed the effects of class size at different levels of student achievement, and their findings have been mixed. We employ quantile regression analysis, coupled with instrumental variables, to examine the causal effects of…

This report provides an overview of education structures and policies that influence equity in school education. It connects these system-level features to student performance in international student assessment surveys (PISA, PIRLS and TIMSS). Looking at 42 European education systems, the report identifies which policies and structures are…