กิจประทีปธรรมพูนศรี, กล้าหาญรุ่งทิพย์, and แดงเรืองอดิศร. 2023. “Development of Academic Achievement in History Subjects On Current World Events (important Events in the 21st Century) Of Students in Grade 4/5 of Ratchaprachanukhro School 31 Using the Tutorial”. Journal of Teaching Science 1 (1). https://firstojs.com/index.php/JEM/article/view/1160.