Learning period is the abbreviation of specific learning stage. A slightly longer learning interval is commonly known as a certain stage, such as preschool stage.

Primary school stage, junior high school stage, high school stage, university stage, etc. The "stage" at this time is similar to the period. For example, "university stage" can also be called "university stage".

Extended data

Category refers to different categories or differences made according to different categories. A distinction made according to different kinds. ? Lu Xun? "The Second Collection of Luan Jieting's Prose: The Resurrection and Rushing of Books": "So we got together, added several categories, opened a series of various catalogues, and a large number of magnificent masterpieces appeared."

Primary school and junior high school belong to compulsory education and basic education, and senior high school (with the improvement of China's development level, it is estimated that senior high school education will be basically popularized by 2020).