Tabpum N, Poonpaiboonpipat W. The Improvement of Mathematical Argumentation Skills through Learning Activities based on Open Approach in the topic of Similarity for Matthayomsuksa 3 Students. AMJ [internet]. 2021 Sep. 30 [cited 2025 Mar. 21];5(3):703-17. available from: https://so02.tci-thaijo.org/index.php/jam/article/view/249418