INTHARAKSA, P. Development of a Supplementary Curriculum Based on Metacognition and Context-Based Learning to Enhance 21st-Century Learners’ Competencies in Schools under the Sakon Nakhon Secondary Educational Service Area Office. Journal of Graduate Research, [S. l.], v. 17, n. 2, p. JGR–17, 2026. Disponível em: https://so02.tci-thaijo.org/index.php/banditvijai/article/view/281381. Acesso em: 1 oct. 2026.