<![CDATA[This study aims to develop a closed organ pipe resonance practical model based on the Phyphox application to improve the verbal and numerical representation abilities of students at SMA N 1 Pundong. The research method used is a quasi-experiment with a one-group pretest-posttest design. The research subjects are students in classes XI B and XI D, each consisting of 36 students. The instruments used included pre-test and post-test questions, verbal representation questions, numerical representation questions, and LKPD that had been validated by experts. The validity test using Aiken's V showed that all instruments were in the high validity category. The data normality test showed that the data was normally distributed, making it suitable for analysis using the Paired Sample T-Test. The analysis results showed a significant improvement in verbal and numerical representation abilities after the treatment, indicated by a significance value (Sig.) of 0.00 (< 0.05) and a t-value that is much larger than the t-value in the table. Thus, the closed organ pipe resonance practical model based on the Phyphox application is effective in improving students' verbal and numerical representation abilities.]]>
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