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In terms of social concept, many parents and social people are accustomed to the traditional large class teaching mode and think that large class teaching is a normal state. To change this concept, education departments and schools need to carry out extensive publicity. The exhibition of educational achievements can be held to show the outstanding achievements of students in small class teaching, including the achievements of students' academic progress and comprehensive quality improvement.Drawing lessons from Europe, America, Japan and South Korea: Controlling the class size of primary and secondary schools and universities to 15 students to improve the quality of teaching and training.1. Challenges and countermeasures of educational resources

2. The change of social concept and educational conceptThird, the implementation challenges and coping strategies1. Challenges and countermeasures of educational resources

Summary: Learning from the successful experience of Europe, America, Japan and South Korea and controlling the class size of primary and secondary schools and college students to 15 students has many positive strategic significance for improving the quality of teaching and training, and cultivating more all-round high-quality talents.Drawing lessons from Europe, America, Japan and South Korea: Controlling the class size of primary and secondary schools and universities to 15 students to improve the quality of teaching and training.2. The change of social concept and educational concept