central banks and digital currencies, Block

When the class size is controlled at 15 students, teachers can know more about each student's learning situation. Teachers can provide targeted counseling for each student's weak points of knowledge. For example, in mathematics teaching, teachers may only explain the knowledge points in a large class, but in a class of 15 students, teachers can find each student's problems in algebra, geometry and other different sectors, so as to explain the problem-solving ideas in a personalized way.1. Challenges and countermeasures of educational resources1. European and American cases

In Europe, countries such as Finland, which are famous for their high-quality education, also implement small class teaching. Finnish schools pay attention to the individualized growth of each student, and the class size is not large, so teachers have more time and energy to tap the potential of students. Teachers can tailor their study plans for students according to their hobbies and specialties. In this educational environment, Finnish students have performed well in programme for international student assessment and other tests, and their innovative ability and comprehensive quality have been widely recognized by the international community.In Europe, countries such as Finland, which are famous for their high-quality education, also implement small class teaching. Finnish schools pay attention to the individualized growth of each student, and the class size is not large, so teachers have more time and energy to tap the potential of students. Teachers can tailor their study plans for students according to their hobbies and specialties. In this educational environment, Finnish students have performed well in programme for international student assessment and other tests, and their innovative ability and comprehensive quality have been widely recognized by the international community.2. Japan and South Korea cases

In a class of 15 students, the focus of education is not only the academic achievements of students, but also the development of students' moral cultivation and artistic accomplishment. Teachers can pay more attention to students' moral education and guide students to establish correct values. For example, by organizing class discussions on social equity, environmental protection and other topics, teachers can deeply understand each student's point of view and give targeted guidance.In terms of educational concept, teachers also need to adapt to this change from large class teaching to small class teaching. Teacher training is particularly important. Schools can organize teachers to participate in training courses in small class teaching and learn the methods and skills of small class teaching, such as how to carry out personalized teaching and how to organize efficient group activities, so as to improve teachers' teaching ability to adapt to the new teaching mode.When the class size is controlled at 15 students, teachers can know more about each student's learning situation. Teachers can provide targeted counseling for each student's weak points of knowledge. For example, in mathematics teaching, teachers may only explain the knowledge points in a large class, but in a class of 15 students, teachers can find each student's problems in algebra, geometry and other different sectors, so as to explain the problem-solving ideas in a personalized way.