South Korea: Tough Schools https://www.freiheit.org/north-and-south-korea/tough-schools
In PISA studies, South Korean students achieve top results. Nevertheless, the education system in the country is controversial. The immense pressure to achieve good results has led to a booming market for private tutoring, exacerbating social inequalities. This is especially evident in the test crucial for university admission.
In „The Intelligence of Nations“ survey by social scientists