The low mathematics numeracy literacy achievement among Grade IV students at SD Gugus II, Gerokgak District, where only 21.49% met the minimum competency threshold, necessitates a measurable pedagogical intervention. This study aimed to examine the effect of the cooperative learning model Team Games Tournament (TGT) assisted by Bamboozle media on students' numeracy literacy competence. A quasi-experimental approach with a pretest-posttest control group design was employed, involving 20 experimental and 29 control group students. The instrument comprised 25 validated multiple-choice items with a KR-20 reliability coefficient of 0.87. Data were analyzed through descriptive statistics, N-Gain, and independent t-test. Findings revealed that the experimental group's mean posttest score (77.10) substantially exceeded the control group (37.59), with N-Gain values of 53.73% versus 31.95%. The t-test yielded t-count 16.295, surpassing t-table 2.011 (sig. 0.000), rejecting Hâ‚€. It is concluded that integrating TGT with Bamboozle significantly enhances students' numeracy literacy.
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