Kaewsiri, C. and Changsri, N. 2026. A Study of Algorithmic Thinking through Sorting Network Activity in Classroom Using Transformative Lesson Study Incorporated with Open Approach. Ratchaphruek Journal. 24, 2 (Jul. 2026), 310–327. DOI:https://doi.org/10.14456/rpjnrru.2026.18.