<![CDATA[This research aims to determine the effect of Inside Outside Circle (IOC) model by using flashcards on students’ English vocabulary mastery. This research was done on the 3rd-grade students of one elementary school in Magelang Regency, Central Java, Indonesia. This research used Pre-Experimental Design which type is One Group Pretest Posttest Design through one kind of treatment. The samples in this research were 3rd-grade students as many as 20 students. The data collection method was a multiple-choice test. The instrument test of this research was a validity test by experts (expert judgment), they are English lecturers of a private university Magelang and a 3rd-grade teacher of elementary school in Magelang Regency. The results of this research pointed out that there was a positive effect of the Inside Outside Circle (IOC) model by using flashcards on students’ English vocabulary mastery. The effect was shown by pre-test and post-test results with means 49 and 80. The result of the Wilcoxon test showed that the significance of Z value was -3,725 with Asymp. Sig. (2-tailed) 0,000 < 0,050.]]>
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