The universal 12 compulsory education in the United States is actually 13, starting from the 5-year-old kindergarten class and reaching the high school 12 grade.

The South Korean government announced that from 20 12, Korean children who have reached the age of five will be included in the common education system, and the compulsory education in South Korea will be extended from the current nine years to 10.

Compulsory education in most developed countries is 15 years, such as Britain and France.