HARTINA, St.; SYAHRIR; SYAFAR, Nurul Fajriani. TEACHER-MEDIATED DUOLINGO USE AND VOCABULARY GAINS AMONG JUNIOR HIGH SCHOOL EFL LEARNERS IN INDONESIAN CONTEXT. e-Journal of ELTS (English Language Teaching Society), [S. l.], v. 14, n. 03, p. 315–327, 2026. DOI: 10.22487/elts.v14i03.6375. Disponível em: https://jurnalfkipuntad.com/index.php/elts/article/view/6375. Acesso em: 8 oct. 2026.