On December 25, the Cross-disciplinary Aesthetic Education Project and the National Northern Education University jointly organized a course observation, inviting Supervisory Committee members Fan Xunlu and Lin Shengfeng of the Supervisory Yuan, as well as Deputy Director Cai Qinghua, Director Zheng Yuanquan, and Deputy Director Li Yujuan of the Ministry of Education The director, section chief Peng Baoshu, and section chief Li Xinting also participated. In addition to the public observation of cross-field aesthetic courses, there will also be course discussions and guided tours of student works exhibitions after the meeting. The cross-disciplinary aesthetic planning team specially recommended the National Taipei University of Education Experimental Elementary School as a school for course observation. The Peking Primary School course "Exploring the Beauty of Triangles" combines visual arts and mathematics. It is mainly taught by teacher Zhan Yupu, and co-taught by teachers Chen Yanlin and Yan Zhixian. The pilot course "Where is the Triangle?" leads students to discover the footprints and applications of triangles in nature and life. Students were then led to use measuring tools to make equilateral triangular tops and design and draw patterns on the tops. In addition, we have also developed the "Big Hands Holding Little Hands" activity, with senior students giving tours to lower-grade students, giving full play to the whole-person education concept of the 108 curriculum of "spontaneity, interaction, and mutual benefit", giving students new learning opportunities .