Casupanan, I. H., & Madriaga, L. G. F. (2024). 3F-PT technique in improving the spelling and vocabulary skills of grade 2 pupils at Sta. Rita Elementary School. HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - SOCIAL SCIENCES, 15(2), 24–36. https://doi.org/10.46223/HCMCOUJS.soci.en.15.2.3180.2025