THE EFFECTIVENESS OF PROJECT-BASED WORKSHEETS TO IMPROVE STUDENTS’ NATURAL SCIENCE CONCEPT UNDERSTANDING IN ELEMENTARY SCHOOL. Primary: Jurnal Pendidikan Guru Sekolah Dasar, [S. l.], v. 11, n. 6, p. 1923–1930, 2022. DOI: 10.33578/10.33578/jpfkip.v11i6.9183. Disponível em: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/638. Acesso em: 21 dec. 2025.