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Villia Anggraini
Universitas PGRI Sumatera Barat
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Education Immunology & microbiology Languange, Linguistic, Communication & Media Mathematics Medicine & Pharmacology Physics Social Sciences Other

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Penerapan Model REACT untuk Meningkatkan Kemampuan Pemecahan Masalah Matematis Murid SMP Berliana Alfarosi Mardhiani; Villia Anggraini; Zulfitri Aima
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 4 (2026): November (In Press)
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i4.3337

Abstract

Mathematical problem-solving ability is a core competency in mathematics learning, yet many students still struggle to solve problems that differ from the examples given by the teacher because instruction remains dominated by conventional methods. This study is motivated by the low mathematical problem-solving ability of Grade VIII.3 students at SMP Negeri 12 Padang. The REACT learning model is considered a suitable alternative because its five stages connect mathematical concepts to real-life contexts and support each problem-solving indicator. The study aims to determine whether the mathematical problem-solving ability of Grade VIII.3 students at SMP Negeri 12 Padang after applying the REACT learning model is better than before its application, and whether there is an increase in students' mathematical problem-solving ability through the implementation of the REACT learning model. This is a pre-experimental research using a one-group pretest-posttest design. The sampling technique used was purposive sampling, with Grade VIII.3 students as the research subjects. The instrument used consisted of essay-format pre-test and post-test questions. The data analysis techniques employed were the t-test and N-Gain to measure the improvement. The results showed that the average pre-test score was 30.92, while the average post-test score was 57.52. The hypothesis test results at a significance level of a=0.05 obtained tcount=6.496 and ttable=2.040. Because tcount > ttable, the proposed hypothesis is accepted. Thus, the students' mathematical problem-solving ability after implementing the REACT learning model is significantly better than before its implementation. The gain score results showed an average increase of 26.61, categorized as moderate, while the N-Gain results showed an average score of 0.40, also falling into the moderate category. Therefore, there is a moderate improvement in students' mathematical problem-solving ability through the application of the REACT learning model.
Validitas E-LKPD Interaktif Berbasis Problem Based Learning pada Materi Lingkaran Kelas XI Fadli Aprilianto; Sefna Rismen; Villia Anggraini
Jurnal Cendekia : Jurnal Pendidikan Matematika Vol 10 No 3 (2026): Jurnal Cendekia: Jurnal Pendidikan Matematika Volume 10 Nomor 3 Tahun 2026
Publisher : Mathematics Education Study Program

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cendekia.v10i3.5495

Abstract

Penelitian ini menghasilkan E-LKPD interaktif berbasis Problem Based Learning pada materi lingkaran untuk peserta didik kelas XI serta mengkaji tingkat validitas produk yang dikembangkan. Pengembangan dilakukan menggunakan model ADDIE yang meliputi Analysis, Design, Development, Implementation, dan Evaluation. Pelaporan dalam artikel ini difokuskan pada proses pengembangan dan penilaian validitas produk. Pada tahap Development, E-LKPD yang dirancang menggunakan Wizer.me dinilai oleh tiga validator yang terdiri atas dua ahli materi dan satu ahli media. Penilaian dilakukan menggunakan lembar validasi dengan skala Likert. Data berupa skor validator dianalisis secara kuantitatif dalam bentuk persentase, sedangkan saran validator digunakan sebagai dasar perbaikan produk. Hasil validasi menunjukkan persentase kelayakan isi sebesar 93,75%, penyajian 95,83%, bahasa 89,58%, kegrafisan 96,88%, tampilan 91,67%, dan kemudahan penggunaan 83,33%. Secara keseluruhan, E-LKPD memperoleh persentase validitas sebesar 91,84% dengan kategori sangat valid. Hasil tersebut menunjukkan bahwa E-LKPD interaktif berbasis Problem Based Learning yang dikembangkan telah memenuhi kriteria validitas dan dapat digunakan sebagai bahan ajar matematika pada materi lingkaran.
Co-Authors Ainil Mardiyah Alma, Siti Haifa Amalia Putri, Amalia Amri, Arif Rahman Andriani, Nike Anika Putri Anna Cesaria Annisa Syafitri Asiah Nurke Asmarita Asmarita Asrialdi Asrialdi Atus Amadi Putra Audra Pramitha Muslim, Audra Pramitha Berliana Alfarosi Mardhiani Dea Siska Deni Marion Gustina Des mawita Dewi Kurnia Dewi Susanti Dewi Yuliana Fitri Deza Karlina Dona Siska Early Yohanda Era Angga Dola Erni Syofna Evi Yani EVRIALIANI ROSBA, EVRIALIANI Fadli Aprilianto Fajriati, Putri Fatthia Muhani Fitra Yarni Fitri Yulia Ningsih Hafizah Delyana, Hafizah Helmi Ali Heni Pujiastuti Iga Kumala Sari Isma, Isma Delita Jasiah Jasiah Julayfah Irina Nasution Julyana, Putri Lita Lovia Lucky Heriyanti Jufri, Lucky Heriyanti Mardiati Mardiati Marianto Marianto Melda Elfiyanti Melisa Melisa Mery Siska Muhammad Gufron Mukhni Mukhni Mursyida Mursyida Nelfia Nelfia Neza Nurvatjri Nofri Yudi Arifin Nurlaili Putri Angriani Raden Mohamad Herdian Bhakti Rahima Rahima Rahma, Puji Aulia Rahmi Rahmi Rahmi Rahmi Ramadoni, Ramadoni Ramayana Ramayana Reflina Reflina Rina Febriana Rini Hartati Risa Lusiana Ronaldi Ashari Rubiah, Rubiah Sari, Anggi Yulia Sari, Anggun Permata Sefna Rismen Shelly Putri Yusman Sherly Adrila Fitri Shummi Maryetti Sindi Aulia Sofia Edriati Sri Handayani Sukatin, Sukatin Syahwa, Keysha Alifia Syamsiar, Syamsiar Tisnim Tisnim Vivin Gusdiana Wella Juliati, Wella Wenny Oktariza Winda pratiwi hamda Yasser Arafat Yoke Hendri Saputra Yulia Haryono Yulyanti Harisman Zainol Hasan Zulfitri Aima