Theslek A, PHOSAI E. Development of Learning Achievement on Parts of Speech through an Innovation Kit Integrated with the Yoniso-manasikara Principle for Grade 6 Students: Development of Learning Achievement on Parts of Speech through an Innovation Kit Integrated with the Yoniso-manasikara Principle for Grade 6 Students. jma [internet]. 2026 Aug. 15 [cited 2026 Aug. 29];13(2):107-21. available from: https://so04.tci-thaijo.org/index.php/JMA/article/view/289408