<![CDATA[This study aims to: (1) determine students' vocabulary mastery before learning using jumble word game. (2) determine students' vocabulary mastery after learning using jumble word game. (3) determine whether or not there is a significant effect of jumble word game on vocabulary mastery. This quantitative research employed a pre-test post-test control group design. The population was grade VIII students of SMP N 8 Padangsidimpuan, with 60 students as a sample. A multiple choice was used as instrument. The experimental group's average score increased from 56.73 (pre-test) to 80.07 post-test), indicating a shift from the "enough" to the "good" category. T-test result showed t_table (3.020) t_count (1.671), confirming the hypothesis. These finding indicate that Jumble Word Game has a significant effect on students' vocabulary mastery at the VIII grade students of SMP N 8 Padangsidimpuan.]]>
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