Thai, H.M. et al. 2026. ARCS MODEL IN TEACHING NATURAL SCIENCES: A CASE STUDY ON DESIGNING TEACHING AIDS FOR THE TOPIC “ATOM”. Ho Chi Minh City University of Education Journal of Science. 23, 4 (Apr. 2026). DOI:https://doi.org/10.54607/hcmue.js.23.4.4801(2026).