บุญจูง อ. and เอกะกุล ธ. 2021. The Operation for the Development of Mathematical Reasoning Ability through the K-W-D-L Technique for Prathomsuksa Six Students (Grade Six) of Ban Nongwang (Sowannee wittayacom)School Attached to Sisaket Primary Educational Service Area Office One. Ubon Ratchathani Journal of Research and Evaluation. 4, 1 (Aug. 2021), 71–78.