VietTESOL International Convention 2025

The role of advanced technology in education has come to the forefront, especially in learning a second language. Applying mobile-assisted language learning to review new words allows learners and teachers more time to practice face-to-face in class. This experiential study aims to investigate the effect of using Quizlet as homework on vocabulary acquisition in a Vietnamese secondary school. This study was conducted in a Vietnamese secondary school with 118 students in grade 8 who were divided into 2 groups: the experimental group (N = 59) and the control group (N = 59). Participants in the experimental group experienced using Quizlet for 4 weeks with teachers’ instructions while learners in the control group reviewed new words in the conventional way at home. Learners were required to do a pre-test in advance and a post-test after the four-week intervention. Furthermore, learners’ long-lasting learning of new words was measured through delayed-tests after 4 weeks of post-intervention. The findings showed that learners in both groups made great progress in vocabulary acquisition; however, learners who used Quizlet as homework had higher scores on the post-test than those who did not. Moreover, the results of the delayed-test indicated that learners using Quizlet at home to review new words had better scores. Regarding learners’ attitudes towards Quizlet, the majority of participants demonstrated an interest and preference for using this educational learning app. This research sheds new light on the application of Quizlet – an educational language learning app as an assignment to enhance secondary learners’ vocabulary knowledge.