Some of their own personalized problems have been solved with the help of students, for the individual problems can not be solved in the second class to consult the teacher. In this way, each student has become the master of learning, although the class collective teaching, but at the same time take into account the individual needs of students. Every problem that the teacher solves in the classroom is a real problem for the students, and through real-time practice feedback, we can continue to solve the real problems left by the students,