The aim of the research was to find out the effectiveness of smart-calendar in
teaching vocabulary. This research used quasi experimental method in which the
sample was based on the school policy. Two classes were chosen:7E as experimental
class and 7F as control class. Pre-test and post-test were used to find the data. The test
was multiple choice consisting 20 items. T-test formula was used to find out the data.
The result of the research showed that there was a significant difference of the
students’ in mastering vocabulary between the students who were taught using smartcalendar
and those who were taught without smart-calendar. It could be seen from the
result of computation of t-test, where t-test is 3.478 and t-table 1.674 at the significant
level α=0.05 in df=54. The result was higher than t-table (3.478>1.674). It means
that the hypothesis that smart-calendar is effective for teaching vocabulary is
accepted.