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The graph understanding for mastering the natural science concepts through the process skills approach aims to improve student ability in lower secondary school. In this study, we conducted a series of quasi-experiments for participants by using pre-test and post-test. The research instruments consisted of two tests and the questionnaires. After learning through the process skills approach, the post-test was used to evaluate the graph understanding and the mastery of natural science concepts.doi:10.29333/iji.2020.13410a fatcat:xsntc2kkvfazzbqp7snhb6h3mi