CASUPANAN, Ivy Hipolito; MADRIAGA, Lady Grace FabeliÑa. 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, [S. l.], v. 15, n. 2, p. 24–36, 2024. DOI: 10.46223/HCMCOUJS.soci.en.15.2.3180.2025. Disponível em: https://journalofscience.ou.edu.vn/index.php/soci-en/article/view/3180. Acesso em: 10 dec. 2025.