This study challenges prior evidence on the impact of Korea's high-stakes school accountability policy as a tool to improve overall achievement and close achievement gaps. Applying difference-in-differences method, the study compares Korean high school students' reading and math test score trends before and after the policy based on the National…

Educators and governments are paying increasing attention to international comparisons as they seek to develop effective policies to improve the performance of their education systems. Data from the Organization of Economic Cooperation and Development (OECD) are useful in revealing best practices across the world. Current data show that the United…