The purpose of this study was to determine the effect of Project ARCHIMEDES Video Lessons on the academic performance in Mathematics of Grade 6 learners in a public school in Aklan. Using the quasi-experimental matching-only pre test – post test design, the study examined two comparative groups of learners. The control group and the experimental group comprised of 20 learners each, matched-paired based on their general average in Mathematics in grade 5. The control group used the conventional modular modality while the experimental group was exposed to video lessons of Project ARCHIMEDES. The pre-test result of the control group and experimental group was both average in rating which was ideal for the study since the two groups possessed similarities in rating. The mean score of the post-test of the experimental group was higher than that of the control group which was 27.05 and 24.60, respectively. Consequently, both appeared to be high in rating with the T- value of -1.399 and p-value of .170. However, the difference was not significant at .05 level. The post-test result revealed that the conventional modular learning and the utilization of video lesson were both effective since teacher’s intervention provided students with direct instructional support in the learning process. However, the Project ARCHIMEDES was still an effective learning enhancement tool and may be used with teacher’s intervention to improve the mathematics performance of the learners.