The difference in educational levels is economic. If you correct for the income & wealth levels of the international district and match them to american districts with similar levels, you have similar academic results. There's no gap.
The issue occurs with taking averages. The United States is a rich country or a developing country depending on where you look. Few other modern industrialized nations are run this way.
Indeed, if you want the best education in the world, many people come to the American universities (public and private). These American Universities which you can name, sit like jewels surrounded by the serfdom education many Americans experience.
It is the same with primary and secondary education.
The issue occurs with taking averages. The United States is a rich country or a developing country depending on where you look. Few other modern industrialized nations are run this way.
Indeed, if you want the best education in the world, many people come to the American universities (public and private). These American Universities which you can name, sit like jewels surrounded by the serfdom education many Americans experience.
It is the same with primary and secondary education.