Fig. 4.3 
Teachers have a great impact on the students as regards their misconception about the conservation of the concept. The teachers, however, also are affected by many other variables. Hence this shifts the central tendency which definitely affects the conception of the subject.  
TABLE 4.4 
COMPARATIVE STUDY OF THE EFFECT OF DIFFERENT CERTIFIED TEACHERS ON STUDENTS ASSIMILATION 
                                                                                                     N.C.E.                    N.D.                      GRADUATE
Students who like Mathematics                                    8 96%                    48 96%                 42 34%
Students affected by teaching Method                       24 48%                 25 50%                  15 30%
Students affected by teaching aid                              23 46%                 22 44%                    19 38%
Students affected by complex concept                    23 46%                 24 48%                    15 30%
Students who assimilate well                                       39 78%                 29 58%                   48 96%
            
It is shown here that teaching aid, complex concept and teaching method affect learners' assimilation  regardless of the status of the teacher . It ranges from 30% to 50%.
FIG 4.4