In American universities, 5% of students are educated by their parents at home, but parents must have certain academic qualifications and skills, and must stipulate certain teaching materials and make teaching plans. The main reason is that Americans are mostly Christians, and they don't want their children to go to school to study evolution, which they think is blasphemy against God.

The curriculum in the United States is definitely different from that in China. Moreover, studying in the United States does not require any exams at all, that is, high school GPA and extracurricular activities. There is no GPA in middle schools in China, so many China students have to take TOEFL and SAT before they can directly enter famous American schools. There is no so-called college entrance examination in America. At first, the SAT was just an exam for many top American universities to apply for scholarships. Don't listen to people say that the SAT is a "national college entrance examination". Only 20% of American high school students take the SAT.