North America is a 12-year education, from 1 grade to 12 grade. At the age of six, I went to primary school for six years, and at the age of 12, I started to attend the seventh grade, which is equivalent to the first grade in China. In some places, junior high school is two years, senior high school is four years and junior high school is three years. Anyway, you usually graduate from high school at the age of 18. /kloc-I went to college at the age of 0/8 and studied for four years. I graduated at the age of 22, and some people graduated earlier. There is no college entrance examination in North America. When you apply for a university, you only need to send your 12 grades to the university you want to take.