ลุลอบ ก. and เอกะกุล ธ. 2021. A Operation on Development of Achievement in Science Using Backward Design Approach for Grade Three Students at Baan Buenghom School under the Jurisdiction of Ubon Ratchathani’s Primary Educational Service Area Office 2. Ubon Ratchathani Journal of Research and Evaluation. 2, 1 (Aug. 2021), 17–26.