Nisamani Sriboonruang และ Wandee Kasemsukpipat;Songchai Ugsornkid. (2024) The Effects of Using Context-Based Learning Activities for Developing Proportional Reasoning Ability of Mathayomsuksa 1 Students. <i>Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University</i>, <i>18</i>(1), 334-347.Nisamani Sriboonruang และ Wandee Kasemsukpipat;Songchai Ugsornkid. "The Effects of Using Context-Based Learning Activities for Developing Proportional Reasoning Ability of Mathayomsuksa 1 Students". Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University 18 (2024):334-347.Nisamani Sriboonruang และ Wandee Kasemsukpipat;Songchai Ugsornkid. The Effects of Using Context-Based Learning Activities for Developing Proportional Reasoning Ability of Mathayomsuksa 1 Students. Pibulsongkram Rajabhat University:ม.ป.ท. 2024.