Provide K12 students with online and offline integrated subject education solutions. Based on the traditional paper-penning learning model, “one-to-one”, “one-to-many”, “many-to-one” and “many-to-many” interactions are carried out between the teachers and students, and among the students by an online interactive platform. In this way, the information transmission of educational connotations such as high-quality teachers, problem-solving ideas, thinking paths and learning habits is realized. At the same time, we work with Columbia University, New York University and BOCE to provide comprehensive training for K12 general-subject teachers.