Bannawongsa A. Development of academic achievement in literature of students in Mathayom 3 using a set of learning activities using the Open Approach teaching method. Sanambin School, Khon Kaen Primary Educational Service Area Office, Area 1. jomld [internet]. 2024 Aug. 30 [cited 2026 Oct. 2];9(8):574-90. available from: https://so06.tci-thaijo.org/index.php/jomld/article/view/276992