The purpose of this research is to identify the conceptual understanding and determine the effect of conceptual change strategies towards the conceptual understanding in mechanics among physics trainee teachers. This research used the quantitative approach and quasi-experimental research design involving six research questions and two hypotheses. The research sample consists of 73 Basic Physics 1 students enrolled in two different campuses of Sriwijaya University, Indonesia. The respondents were selected using the purposive sampling technique. Two research instruments namely:the Force Concept Inventory (FCI) (Indonesian version) and the Certainty of Response Index (CRI) were used in the research. Meanwhile, the three conceptual change strategies used were the Predict-Observe-Explain-Apply (POEA), Conceptual Change Texts (CCT), and the analogy technique. The pre-test and post-test which used data from the FCI were analyzed to determine the mean N-gain while the t-test and Mann-Whitney t.....

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