เคราะห์ดี ห. The Development of Creative Thinking Skills and Learning Achievement Using Lesson Study by Synectics in The S 23102 Social Studies Subject for Grade 9 Students. EDGKKUJ [internet]. 2018 May 25 [cited 2025 Apr. 27];11(4):243-5. available from: https://so02.tci-thaijo.org/index.php/EDGKKUJ/article/view/125585