Ninchim, Suthatip, and Napaporn Tunya. 2021. “The results of mathematics learning management exploration of basic counting by applying problem-based learning activities (PBL) and exploration Learning Management (5E) for Mathayomsuksa 4 Students at Prince of Songkla University Demonstration School (Secondary)”. Wishing Journal Review 1 (2). Ratchaburi, Thailand:RA 13-28. https://so01.tci-thaijo.org/index.php/WJR/article/view/249627.