Teaching strategies play an essential aspect in the teaching and learning process. Teachers have been considered individuals who play a vital role and are the key factor in the students learning process. The main purpose of this study is to determine whether there is significant difference between traditional teaching and teaching using multimedia instruction in the academic achievement of the students in Camanlangan National High School. To this end, a quasi-experimental design was used, researcher identified two groups for this study. One of the groups is control group and the other group is experimental; each group consist of 35 students, 18 males and 17 females respectively. Traditional teaching or instruction was given to the control group and teaching using multimedia treated as experimental group. Both groups were subjected to pretest and posttest in the lesson tackled. The analysis of the posttest showed that there is no significant difference between the academic achievement of control and experimental group at a significance level of 0.05. The result was the academic achievement of both control and experimental rose in the posttest as a result in traditional teaching and using multimedia approach. The results also implied that the combination of traditional and using multimedia in teaching can be beneficial in teaching-learning process and they have shown a better result when traditional strategies combine with the multimedia and when they are combined with group strategies.