02368nam a2200217Ia 4500 CTU_238990 210402s9999 xx 000 0 und d 428.007 D513 8140111 Tô, Thái Ngọc Dung The Effects of using quizlet app on EFL high school students' vocabulary retention : Master of education program: Principles and Methods in English Language Education = Luận văn Thạc sĩ Khoa học Giáo dục chuyên ngành. Lý luận và Phương pháp dạy học môn tiếng Anh Tô Thái Ngọc Dung ; Trịnh, Quốc Lập (Giảng viên hướng dẫn) Cần Thơ Trường Đại học Cần Thơ 2020 Vocabulary is at the heart of developing proficiency and achieving competency in any language learning skill. Besides, with the improvement of technology, the process of integrating technology in education has gradually become inevitable. This research aims at investigating whether Quizlet app has any significant effects on EFL high school students’ vocabulary acquisition and retention. The research followed a combination of a quasi-experimental method and a mixed-method with the participation of 64 EFL tenth-grade learners in a high school in the Mekong Delta. These participants were divided into 2 groups: the control group and the experimental group. Three research instruments namely vocabulary test, a questionnaire and an interview. The findings showed that there was no significant difference about vocabulary learning and vocabulary retention among the control group and the experimental group. However, there was improvement between the pre-test- posttest and pretest - delayed post-test among the two groups. Besides, the majority of the participants in the experimental group held positive attitudes toward learning and improving their vocabulary retention via Quizlet app. The researcher suggests that further studies in this area should consider a larger sample size to obtain a better picture of the reality of the effect of Quizlet app on vocabulary acquisition and retention. English language,Tiếng Anh Study and teaching,Học và dạy học Trung tâm Học liệu Trường Đại học Cần Thơ