แสนบุญเรือง ณ, อารี หลวงนา อ. A Development of a Mathematics Learning on the Solution of Multiplication and Division by Using the Instructional Management Based on a Constructivist Theory for Prathom Suksa Three Students of Ban Kumwa School under Ubon Ratchathani Primary Educational Service Area Office 3. ubonreseva [internet]. 2021 Aug. 27 [cited 2026 Oct. 3];3(2):21-30. available from: https://so06.tci-thaijo.org/index.php/ubonreseva/article/view/250939