1. Primary and Secondary Education is an academic journal sponsored by the Ministry of Education of People's Republic of China (PRC) and Renmin University of China.

2. Core journals are the main journals of a certain discipline, generally referring to professional journals with large amount of professional information and high quality, which can represent the development level of professional disciplines and are valued by readers of this discipline. Relevant experts have found that the actual distribution of literature information sources has a core journal effect, that is, a large number of scientific papers in a certain profession are concentrated in a few scientific journals.