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? Pwd= 1234 extraction code: 1234 K 12 education is a comprehensive basic education from pre-school education to high school education, aiming at cultivating students' all-round development. Among them, primary school mathematics network courses and synchronous tutoring courses play an important role. The online course of primary school mathematics provides rich mathematics learning resources through the online learning platform, helps students consolidate basic knowledge, cultivate problem-solving ability, and provides personalized learning experience through interactive teaching. At the same time, the synchronous tutoring teaching curriculum is synchronized with the school curriculum, providing guidance and guidance for students to help them understand and apply what they have learned.