By limiting the access conditions a

By limiting the access conditions and the size of students, SPOC can customize courses for these specially selected students, provide them with differentiated and stronger professional support, and enhance students' complete experience of courses, thus avoiding the high dropout rate and low completion rate of MOOC and making it easier to obtain certificates. The SPOC experiment further shows that compared with the traditional classroom, the MOOC video used by SPOC can attract students to prepare carefully and stimulate their participation, especially for those students with insufficient learning motivation. Compared with pure MOOC, SPOC makes online learning go beyond the stage of copying classroom curriculum and produces more effective learning effect. SPOC mode makes full use of the important features of MOOC, including obtaining high-quality curriculum materials and feeding them back to students quickly through automatic scoring, so as to maximize the effectiveness of scarce resources.