Dian Fadhilawati, Moh Mansur and Suyitno 2023. THE UTILIZATION OF DUOLINGO TO BOOST STUDENTS’ GRAMMAR MASTERY IN SENIOR HIGH SCHOOL. JARES (Journal of Academic Research and Sciences). 8, 2 (Sep. 2023), 37-52. DOI:https://doi.org/10.35457/jares.v8i2.3034.