Dari konkret ke virtual: mengembangkan LKPD problem-based learning berbantuan cabri 3D sebagai jembatan peningkatan kompetensi pemecahan dan komunikasi matematis siswa
Abstract
This study was motivated by the low levels of students’ mathematical communication and problem-solving abilities in junior high schools, caused by the use of conventional learning models and the lack of innovative teaching materials. The aim of this research was to develop a Student Worksheet (LKPD) based on the Problem-Based Learning (PBL) model assisted by Cabri 3D software as a solution to enhance both abilities. The research employed the Research and Development (R&D) method using the Plomp model, which consists of the preliminary investigation, prototype development, and assessment phases, along with Tessmer’s formative evaluation design. The subjects were ninth-grade students at SMP Negeri 5 Tinambung. Data were collected through expert validation, questionnaires, observations, and pretest–posttest, and analyzed descriptively and inferentially. The results indicated that the developed LKPD met the criteria of being highly valid, highly practical, and effective, as evidenced by a significant improvement in students’ communication and problem-solving abilities (Sig. 0.000 < 0.05). This product contributes as an innovative teaching material that strengthens the integration of technology and the PBL model in mathematics learning.
Penelitian ini dilatarbelakangi oleh rendahnya kemampuan komunikasi matematis dan pemecahan masalah siswa SMP akibat penggunaan model pembelajaran konvensional dan minimnya bahan ajar inovatif. Penelitian ini bertujuan mengembangkan Lembar Kerja Peserta Didik (LKPD) berbasis Problem Based Learning (PBL) berbantuan Cabri 3D sebagai solusi peningkatan kedua kemampuan tersebut. Metode yang digunakan adalah penelitian dan pengembangan (R&D) model Plomp dengan tahapan investigasi awal, pengembangan prototipe, dan penilaian, serta desain formative evaluation Tessmer. Subjek penelitian adalah siswa kelas IX SMP Negeri 5 Tinambung. Data dikumpulkan melalui validasi ahli, angket, observasi, dan pretest-posttest, dianalisis secara deskriptif dan inferensial. Hasil menunjukkan LKPD memenuhi kriteria sangat valid, sangat praktis, dan efektif dengan peningkatan signifikan kemampuan komunikasi dan pemecahan masalah (Sig. 0,000 < 0,05). Produk ini berkontribusi sebagai bahan ajar inovatif yang memperkuat integrasi teknologi dan model PBL dalam pembelajaran matematika.
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