K 12, a professional term in education, is the abbreviation of preschool education to senior high school education, and now it is widely used to refer to basic education.

K 12 or K- 12 is the abbreviation of kindergarten, passing, 12th grade and grade, which refers to the period from kindergarten (generally 5-6 years old) to 12th grade (generally 17- 18 years old).

K 12 is mainly adopted by the United States, Canada and other North American countries.

K 12 is the abbreviation of primary and secondary education in North America. This phrase is the abbreviation of kindergarten to 12 grade, and it is the first and last grade of free education in the United States and Canada.