RUEKSANAN, N. Development of a Learning Management Model Using a Phenomenon-Based Concept to Enhance Systematic Thinking for Upper Elementary School Students. Saengtham College Journal, Nakhon Phathom, Thailand, v. 17, n. 2, p. 63–81, 2025. Disponível em: https://so01.tci-thaijo.org/index.php/scj/article/view/271253. Acesso em: 3 sep. 2026.