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It is also more beneficial to the cultivation of students' artistic and sports specialties. Teachers can discover the potential of each student in painting, music and sports, and provide them with more opportunities for guidance and participation in related activities. For example, in music class, teachers can give each student more time to practice solo and improve their singing skills.2. Japan and South Korea cases2. Japan and South Korea cases

1. European and American cases2. The change of social concept and educational conceptSecond, the advantage of controlling the class size to 15 people

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