Saowaphak Wongkrai และ Parichart Poophakdee. (2026) Effects of Learning Activities Based on the STEM Education Concept on the Problem-Solving Skills and Learning Management Design Abilities of Pre-service Mathematics Teachers. <i>Journal of Education Studies, Chulalongkorn University</i>, <i>54</i>(3), 1-20.Saowaphak Wongkrai และ Parichart Poophakdee. "Effects of Learning Activities Based on the STEM Education Concept on the Problem-Solving Skills and Learning Management Design Abilities of Pre-service Mathematics Teachers". Journal of Education Studies, Chulalongkorn University 54 (2026):1-20.Saowaphak Wongkrai และ Parichart Poophakdee. Effects of Learning Activities Based on the STEM Education Concept on the Problem-Solving Skills and Learning Management Design Abilities of Pre-service Mathematics Teachers. Centre for Education Innovation, Print and Online Media:ม.ป.ท. 2026.