<![CDATA[This study uses a quantitative approach. The type of research is experimental, aiming to determine the effectiveness of using UNOKA as a teaching tool in understanding the concept of flat shapes among students of SMPIT Plus Al-Mubarak Borikamase. This research applies a pre-experimental design in the form of a One Group Pretest-Posttest Design. The population includes all students of SMPIT Plus Al-Mubarak, with the sample being class VIII, consisting of 19 students. Data were collected through a concept understanding test and validated observation sheets. The data were analyzed both descriptively and inferentially. Based on the results of observations, there was an improvement in students’ concept understanding test scores, which was partly due to increased student engagement during the learning process. Observation results showed that nearly all students responded positively, with an average percentage of 95.67%, and questionnaire responses showed that 91.59% of students responded positively to the implementation of UNOKA teaching aids. The average pre-test score before using UNOKA was 67.63 with a mastery percentage of 0%. After using UNOKA, the average score increased to 85.79 with a 100% mastery rate. The average N-Gain was 0.5389, which falls into the moderate to high category. Based on the hypothesis testing criteria, it was concluded that H₀ was rejected, indicating that the use of UNOKA is effective as a teaching tool in enhancing the understanding of flat shape concepts among students at SMPIT Plus Al-Mubarak. This research shows a significant improvement in conceptual understanding through the use of UNOKA as a learning medium.]]>
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