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Vannapha, P., Phayyavong, S., Thiphaphone, K. and Phanthong, B. 2026. The Impact of Teaching Aids on Learning and Development of Preschool Children in Luangprabang District. Souphanouvong University Journal Multidisciplinary Research and Development . 11, Special Issue (Jan. 2026), 146–153. DOI:https://doi.org/10.69692/SUJMRD11Special146.