First of all, the differences in educational methods account for a large part of the reasons. In China, children are flowers; in the United States, children are seeds. There is an essential difference between the two. Flowers are cultivated and grow. When there is no care, they will lose their original luster. And seeds grow by their own efforts, even without the help of adults, they can still thrive! Americans try to let children play, and advocate using children's exploratory nature to get in touch with nature, know the real world and build a cognitive foundation. Let children feel the size, shape, color and texture with five senses, and feel the meaning of numbers with heart, not just get the correct answer. They believe that children can't learn abstractly like older children or adults, but can only use their impressions of the real world to establish logical thinking. Children in China can know that 3+4=7 even if they don't understand it. Memorizing the multiplication table is just parroting.
Furthermore, the United States pays more attention to cultivating students' practical ability to use knowledge, and pays attention to cultivating students' suspicion and critical spirit of knowledge and authority, as well as expanding and creating knowledge. American schools encourage children to do research from an early age, and cultivate their research ability, the ability to deal with problems independently, and the ability to organize sports research methods for learning materials.
The most important thing to evaluate whether a university is outstanding in the world is the papers and academic research results published by the whole university in various professional academic research journals around the world. Another is how many top scientific research projects and influential professors there are in the school. Then there are the number of graduate students and doctors. These data are well done by American universities. Universities in many other countries are most concerned about awarding diplomas. This is why the United States can become the country with the highest education level in the world, but this kind of education method is based on the national conditions and may not be applicable to its own country.