Dale Mark N. Bristol, Shane Kyle M. Caro and Jeanelyn R. Tominez 2025. Impact Assessment on the Utilization of Portable Multi-Lens Off-Chip Cellphone Microscope: An Extension Activity to Munguia National High School, Dupax Del Norte, Nueva Vizcaya, Philippines. International Journal of Progressive Research in Science and Engineering . 6, 03 (Apr. 2025), 54–56.