Vocabulary is a list of word in particular language. Vocabulary is the special set
of words used in particular kind of work, business, economic, technology, etc.
The objective of this research is to find out the effectivness Duolingo application
for improving vocabulary ability at the sixth grade of Madrasah Ibtidaiyah Darul
Ilmi and its effect on students’ vocabulary achievement.
The design of this research was experimental research which belongs to
quantitative method. The population of this research was the entire sixth grade of
Madrasah Ibtidaiyah Darul Ilmi Banjarbaru. There were two classes, they were
VIB consisted of 25 students who got treatment using Duolingo application and
VIA consisted of 26 students who got treatment using conventional teaching. The
instrument of the research was vocabulary test consisted of multiple choice.
Before treatment, pre-test was conducted to both groups. Meanwhile, post-test
was conducted after the treatment. Then, the data were analyzed by using SPSS (
Statistical Product and Service Solutions) for Windows version 22.0.
The result of this thesis shows that at the sixth grade using Duolingo
application score is 7.279 (t-count is higher than t-table), while at the sixth grade
without using Duolingo application score 2.021 (t-count is lower than t-table).
The t-test calculation showed that there was a significant difference who used
Duolingo application and who did not use Duolingo application. It mean that Ho
was rejected and Ha was accepted. So, Duolingo application was effective to
improve English vocabulary at the sixth grade of Madrasah Ibtidaiyah Darul Ilmi.