Kruelamai, Papassara, and Wasana Keeratichamroen. 2024. “A Comparison of Learning Achievement on Enjoyable Thinking with Pyramid Cone and Sphere and Problem Solving Ability of Grade 9 Students between Using MEAs and SSCS Model”. Ratchaphruek Journal 22 (3):116-30. https://doi.org/10.14456/rpjnrru.2024.38.