THE PROBLEM RATIONALE High performance in every test is one of the major goals of every teacher and every learning institution. But most of the mathematics teachers, especially the researcher, failed to achieve these goals. During the seminar, the researcher had an informal interview with the other mathematics teacher, teaching Grade 7, in the district. Based on the interview, the researcher found that most of the students, especially those who belong to lower section, perform slowly and poorly in mathematics. Students do not have mastery even in fundamental operations. ...