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This study aims to get an overview of students conceptual changes about water properties. The study samples were fifth grade elementary school students who had obtained water properties in their schools. The quasi-experimental method was used to obtain the data. This design consisted of two groups namely the experimental group and the control group. The instrument used was a written test with the five-tier test method. KIT IPA was used as a learning media. The experimental class was given a learning treatment with a practicum-based Predict-Observe-Explain (POE) model and the control class did not learn through practicum-based Predict-Observe-Explain (POE) model. The results showed that there were generally significant differences in conceptual changes between the experimental class and the control class. Practical activities using the Predict-Observe-Explain (POE) model were one way to convey the correct concept of the concept of water properties. In the process of mastering the concept, students went through the stages of thinking starting from the stages of predicting, observing and giving an explanation of a phenomenon. This shows that practical activities with the use of the Predict-Observe-Explain (POE) model provided better conditions to provide students with a correct understanding of the concept.