This study provides the empirical support that how feedback support students to improve their achievement in mathematics. The sample of the study was 87 students of Mathematics in grades IX. There were 43 students in the control group and 44 students in the experiment group. Groups were matched on students’ results in Mathematics in grade 8 to ensure the equivalence of both groups. Furthermore, a pretest was also conducted to confirm equivalence. The researcher employed different techniques and strategies of feedback while teaching mathematics to the experiment group. At the end of the intervention, the participants of this study were posttested. The collected data was analyzed by SPSS 15 version. A comparison of pretest and posttest scores of control and experiment group has shown a significant effect of feedback on students’ achievement in mathematics. The average and the low ability learners of the experiment group outperformed the learners of the respective abilities in the control group.