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? Pwd= 1234 extraction code: 1234 K 12 Education is committed to providing a variety of excellent extracurricular courses for junior high school students, covering various disciplines and areas of interest, and stimulating students' interest and creativity. Through the application of electronic textbooks, students can study anytime and anywhere, which improves the convenience and flexibility 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 future study.