Wehaloy, W.; Kunmud , N.; Chaiyapan, M. The Development of On-Time Assignment Submission Behavior of Matthayom 2 Students Using a Stamp Point Collection Reinforcement System at Patongprathankiriwat School, Hat Yai District, Songkhla Province. J. Soc. Sci. Kamphaeng Saen 2026, 1, 31-39.