Makahinda, Tineke, and Vicky Julius Mawuntu. “Development of Thermodynamics Learning With Empirical Approach and Portfolio Assessment Techniques”. Studies in Learning and Teaching 4, no. 2 (August 31, 2023): 285-295. Accessed October 10, 2026. https://scie-journal.com/index.php/SiLeT/article/view/263.