SILAKATE, W.; NAOWANONDHA, A. A Study of Learning Achievement on Conserving Hometown Unit, Problem Solving Ability and Analytical Thinking Ability of Grade 6 Students Using Problems Based Learning. Ratchaphruek Journal, [S. l.], v. 20, n. 2, p. 166–178, 2022. DOI: 10.14456/rpjnrru.2022.13. Disponível em: https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/253613. Acesso em: 26 aug. 2026.