In this paper, we describe the approach that the systematized the process of student created mathematics exercises and answers and updating the contents of the mathematical exercise book. This effort was made to solve the problem that in general exercise book does not correspond to the learning content of the department or the level of the student. This effort led students to grasp the parts that they did not understand by making mathematics exercises and commentaries, and to review the contents learned in the past. Furthermore, based on the learning items of each subject, it can select necessary mathematics exercises and respond to the rapid change of the departmental situation such as curriculum change. As a result of this effort, the pass rate of mathematics subjects improved and the retention rate of learning contents increased.