Reading comprehension is an essential interdisciplinary skill that serves as a foundation of all other subject areas. In science, as a subject rich in vocabulary words, the learner's ability to read and comprehend to generate a conceptual understanding cannot be set aside. Thus, integrating literacy strategies such as vocabulary instruction strategies in teaching the subject is of great help to the learners. This quasi-experimental research determined the effect of integrating explicit vocabulary instruction strategy in the conceptual understanding of students in science. Forty-four students served as participants in this research. Inquiry-based approach, particularly the Engage, Explore, Explain, Elaborate, and Evaluate Learning Cycle (5 E’s) was utilized in teaching the control group. While in the experimental group, the same strategy was employed, but with the integration of vocabulary instruction strategies. T-test was used in determining the significant difference in the perform.....

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