K 12 education: a professional term of education, which is the abbreviation of preschool education to high school education, and is now widely used to refer to basic education. Refers to the kindergarten (generally 5-6 years old) to the twelfth grade (generally 17- 18 years old), which is the first and last grade of free education in the United States, Australia, Britain and Canada. K- 12 is an international term for basic education.

"k" in "K 12" stands for kindergarten, and "K 12" stands for 12 grade (equivalent to the third grade in China). "K- 12" refers to the education from kindergarten to 12 grade, so it is also a general term for the basic education stage internationally.

The so-called K 12 education refers to the education system from the first grade of primary school to the third grade of high school, that is, the basic education in three stages: primary school, junior high school and senior high school. The age range of users is generally 7-18 years old. At present, the population of K 12 education in China is as high as1800,000, and it is expected to reach 21200,000 in 2020, which lays the foundation for the development of K 12. With the implementation of the two-child policy, the number of school-age population in K 12 will further increase.

Nowadays, parents are really willing to invest in order to give their children a better education. Rich people even spend hundreds of dollars on school districts that they can't live in. Those who have no money will also spend money to make up lessons for their children during holidays and after class. Individuals can earn hundreds of thousands even in the last training class. It's really easy to make money in the field of K 12 now.