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Penelitian ini bertujuan untuk mengembangkan Lembar Kerja Peserta Didik (LKPD) berbasis Realistic Mathematics Education (RME) guna meningkatkan kemampuan komunikasi matematis siswa. Permasalahan yang diangkat adalah rendahnya kemampuan komunikasi matematis siswa yang teridentifikasi dari hasil observasi awal, di mana lebih dari 60% siswa mengalami kesulitan menyampaikan ide atau menjelaskan proses penyelesaian masalah secara matematis. Model pengembangan yang digunakan adalah ADDIE karena memungkinkan perencanaan terstruktur, validasi ahli, serta evaluasi efektivitas produk. Subjek penelitian terdiri atas 28 siswa kelas VIII di salah satu SMP di Provinsi Lampung. Instrumen yang digunakan meliputi lembar validasi ahli, angket respon siswa, dan tes kemampuan komunikasi matematis. LKPD yang dikembangkan divalidasi oleh dua ahli dan memperoleh skor rata-rata 87%, yang menunjukkan kategori “sangat valid. Respon siswa terhadap LKPD juga sangat positif dengan skor rata-rata 85%. Efektivitas LKPD diuji melalui hasil pretest dan posttest, menunjukkan peningkatan skor rata-rata dari 52 menjadi 78 dengan N-Gain sebesar 0,65 dalam kategori sedang, serta hasil uji-t menunjukkan peningkatan signifikan. Hasil penelitian ini menunjukkan bahwa LKPD berbasis RME yang dikembangkan efektif dan layak digunakan untuk meningkatkan kemampuan komunikasi matematis siswa.

This study successfully developed a Student Worksheet (LKPD) based on Realistic Mathematics Education (RME), which was validated by experts and deemed highly feasible.Student responses showed strong acceptance and engagement, and the product was proven effective in improving students mathematical communication skills.This was evidenced by an increase in the average score from 52 (pretest) to 78 (posttest), with an N-Gain score of 0.These results affirm that contextual, student-centered instructional tools can enhance not only mathematical understanding but also students ability to communicate their ideas clearly.

To further enhance mathematical communication skills, future research could explore the integration of digital media and local contexts in RME-based worksheets. Digital worksheets can provide more interactive learning experiences and accommodate blended or hybrid settings, aligning with the current educational demands. Additionally, incorporating familiar and relevant local contexts can strengthen student engagement and make it easier for them to build mathematical solutions. This aligns with the PMRI principle, emphasizing local wisdom in mathematics education. Furthermore, involving teachers in the design and application process ensures better classroom alignment and increases the sustainability of such innovations.

  1. Analysis Of Mathematical Communication Skills Of Junior High School Students On Algebra Material | Radian... doi.org/10.35706/rjrrme.v1i3.7153Analysis Of Mathematical Communication Skills Of Junior High School Students On Algebra Material Radian doi 10 35706 rjrrme v1i3 7153
  2. Development of Worksheets Based on Realistic Mathematics Education to Enhance Junior High School Students’... journal.institutpendidikan.ac.id/index.php/mosharafa/article/view/3065Development of Worksheets Based on Realistic Mathematics Education to Enhance Junior High School StudentsAo journal institutpendidikan ac index php mosharafa article view 3065
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