Kachi, H., Yasunaga, T., Sakai, K., Hyuga, R. and Shiota, S. 2022. DEVELOPMENT AND EVALUATION OF MATERIALS FOR CHILDREN TO REDUCE THE TABLET DEVICE OPERATIONAL PROBLEMS: Received: 10th January 2022; Revised: 14th February 2022, 3rd March 2022, 5th March 2022; Accepted: 7th March 2022. PUPIL: International Journal of Teaching, Education and Learning. 6, 1 (Apr. 2022), 271–284. DOI:https://doi.org/10.20319/pijtel.2022.61.271284.