The School in Finland - Best in the World!

According to one of PISA's (Programme for International Students Assessment) studies about schools in the world and their quality, Finland recently came in first place.
Different studies use different variables and I don't know the exact ones used in this case but the list looked like this:

1. Finland
2. South Korea
3. Japan
4. New Zealand
5. Australia
6. The Netherlands
7. Switzerland
8. Estonia
9. Germany
10. Belgium
11. Poland
12. Island
13. Norway
14. Great Britain
15. Denmark
16, Slovenia
17. Irland
18. France
19. OECD average
20. USA
21. Hungary
22. Sweden
23. Czechia