Husnaini, Amalia, S. and St. Hartina 2026. Gamifying the Classroom: The Effect of Quizizz on Vocabulary Retention Among Indonesian Junior High School Students. FOSTER: Journal of English Language Teaching. 5, 4 (Jun. 2026), 284-301. DOI:https://doi.org/10.24256/foster-jelt.v5i4.469.