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? Pwd= 1234 extraction code: 1234 K 12 Education is committed to providing junior high school students with diversified extracurricular excellent courses, covering various disciplines and areas of interest, and stimulating students' interest and creativity. With the application of electronic teaching materials, students can study anytime and anywhere, which improves the flexibility and convenience of learning. The provision of exercises helps students to consolidate their knowledge and deepen their understanding and application ability. In addition, K 12 education also provides advanced courses, such as onion mathematics, to provide students with more in-depth learning experiences and challenges. At the same time, pay attention to cultivating students' learning methods and skills, help them master scientific learning methods, improve learning effect and autonomous learning ability, and lay a solid foundation for the future learning path.