Detail Cantuman

This research was conducted to investigate the use of the Duolingo
application in improving students’ vocabulary mastery to the eleventh-grade
students of SMK Gemilang Modernland in the academic year 2022/2023 and to find
out students’ perception on the use of Duolingo application in improving their
vocabulary mastery. In this research, the researcher takes mixed-method research:
(a) quantitative: pre-experimental design with pre-test and post-test, and (b)
qualitative: questionnaire and documentation. The researcher takes students in XI
AP of SMK Gemilang Modernland as her subject of the research with four
meetings. Based on the tests result, the students’ score is increased. The mean score
of pre-test is 67.84, and the mean score of post-test is 77.52. It shows that the posttest’s mean is higher than the pre-test’s mean. Based on the questionnaire, the result
of the research showed that the use of Duolingo in teaching English has many
positive effects to the students, such as; the Duolingo feature was helpful to
improving their motivation to study English, the characteristics of Duolingo can
improve their effort in learning and Duolingo also make the students enjoy the
exercises in learning English. Furthermore, nearly all students feel that they will
continue to use Duolingo to study English.