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Kohnae, S., SAFKOLAM, R. and Sekseng, L. 2023. THE EFFECTS OF USING LEARNING ACTIVITIES PACKAGE ON ENERGY ON OUR EARTH TO ENHANCE LEARNING ACHIEVEMENT OBSERVATION SKILLS AND CLASSIFICATION SKILLS OF 3rd GRADE STUDENTS UNDER THE COVID-19 SITUATION. Research Community and Social Development Journal. 17, 1 (Feb. 2023), 14–25. DOI:https://doi.org/10.14456/nrru-rdi.2023.2.