Kohnae, S., R. SAFKOLAM, and L. . Sekseng. “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, vol. 17, no. 1, Feb. 2023, pp. 14-25, doi:10.14456/nrru-rdi.2023.2.