Independent-sample t-test was conducted in comparing the mathematics achievements of the two groups. The
post-test mean scores of students’ mathematics achievement for the experimental group taught by the cooperative
learning was 47.56 (SD = 2.74), and that for the control group taught by the conventional teaching it was 35.31 (SD
= 1.89). Table 2 shows that the mean for the experimental group (M = 47.56) was greater than that for the control
group (M = 35.31). The difference between these two post-test mean scores was significant t (78) = 23.24, p < 0.05
in favour of the experimental group, which revealed that the performance of experimental group was significantly
better than control group. As such, cooperative learning positively affects students’ mathematics achievement.