Apao, C., Enricoso, J., Sapilan, J.C., Manugas, R., Cuevas, N., Diate, K. and Malayao Jr., S. 2024. Development and Evaluation of Grade 4 Printed and Digitized Reading Materials on Topic Light, Heat and Sound. International Journal of Science Education and Teaching. 3, 2 (Sep. 2024), 67–78.