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Peningkatan Kemampuan Pemahaman Konsep dan Komunikasi Matematis Siswa Dengan Menggunakan Pembelajaran Kooperatif Tipe Jigsaw Eri Widyastuti
AlphaMath : Journal of Mathematics Education Vol 1, No 1 (2015)
Publisher : Department of Mathematics Education, Universitas Muhammadiyah Purwokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/alphamath.v1i1.208

The purposes of this study to determine: (1) The different improvement of students proficiency of mathematics understanding who were taught through STAD, Jigsaw and the students who were taught through conventional study, (2) The different improvement of students proficiency of mathematics understanding who were taught through STAD, Jigsaw and the students who were taught through conventional study, (3) How the process of problem solving by the students who were taught through STAD, Jigsaw and conventional study. This research was aquasi-experimental study. This study population of this study are the students of XI IPA in Medan. The school are selected randomly as the subjects research, those are SMA Negeri 17 Medan and SMA Dharma Pancasila Medan. The first experimental class was treated by STAD, the second experimental class was treated by Jigsaw and the control class was treated by conventional study. The instruments used consist of: (1) The proficiency test of mathematics understanding, (2) The proficiency test of mathematics communication and (3) The observation sheet. These instruments have fullfilled the essential of content validity and reliability coefficient used were 0.91 and 0.91 for mathematics understanding and mathematics communication. The data analysis was done by using variance analysis (ANAVA). The results showed that (1) The different improvement of students proficiency of mathematics understanding who were taught through STAD, Jigsaw and the students who were taught through conventional study, (2) The different improvement of students proficiency of mathematics understanding who were taught through STAD, Jigsaw and the students who were taught through conventional study, (3) The process of problem solving by the students who were taught through STAD, Jigsaw have many variations if it was compared by the process of problem solving by the students who were taught through conventional study. Keywords : Cooperative Learning with STAD and Jigsaw, Mathematics Understanding and Mathematics Communication.

Development Of Junior High School Mathematics E-Book And Student Project Sheet Based On Integrated Merdeka Belajar Project Based Learning Prihatin Ningsih Sagala; Eri Widyastuti
International Journal of Educational Research & Social Sciences Vol. 2 No. 6 (2021): December 2021
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijersc.v2i6.60

The pandemic Covid-19 has resulted in limited direct interaction between teachers and students in the classroom. Learning goes from offline to online. The development of interactive e-book for Middle School Mathematics and student project sheets based on project based learning integrated Merdeka Belajar is very relevant to helping distance learning students to be actively involved in learning. Some of the features contained in the Junior High School Mathematics E-book include concept maps, instructions for using e-modules, embedding youtube links, google form links, audio features, teacher presentation videos, student assignment links, student project sheets and student evaluation links. These features make the e-book interesting and interactive. The independence of learning can be felt by students when choosing a project that is in accordance with the conditions of the surrounding environment. The results showed that the developed E-book in terms of the validity aspect of the material and media validator assessment was 3.67 with a very feasible category. The practical aspect seen from the responses of students and mathematics teachers was 3.50 (87.5%) and 3.64 (91%) in the very practical category, respectively. For the student project sheet developed to stimulate 6 aspects of student learning independence based on the learning independence instrument (Hidayati & Listyani, 2010) as many as 19 items. The given project sheet is able to stimulate students to achieve learning independence in the medium category (mean 3.27 on a scale of 5).

Development Of First High School Mathematics LKPD Based On Case Method Integrated Local Culture Mandailing Tribe Prihatin Ningsih Sagala; Pristi Suhendro L; Eri Widyastuti
International Journal of Educational Research and Social Sciences (IJERSC) Vol. 3 No. 4 (2022): August 2022
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijersc.v3i4.463

Learning is a process of interaction between students and teachers, with lesson materials, delivery methods, learning strategies and learning resources in a learning environment. The success of learning can be seen through the level of success in achieving educational goals. Education is a conscious and planned effort to create a learning atmosphere and learning process so that students actively develop their potential to have religious spiritual strength, self-control, personality, intelligence, noble character, and skills needed by themselves, society, nation and state, and have global mindset. The implementation of learning with the case method model is carried out to overcome the problems that arise as a result of the Limited Face-to-face Learning (PTMT) policy, such as less active student learning activities, low student learning responses and low student learning outcomes. Junior high school students belonging to the Generation Z category have an attitude of openness, this generation accepts various views and mindsets, causing them to easily accept diversity and differences in views. As a result, Gen Z becomes difficult to define themselves, selfidentity changes based on the factors that influence their thinking. Therefore, it is very important to restore national identity or introduce the cultural identity of the surrounding community so as not to be eroded by the development of the outside world which makes generation Z forget local culture, one of which is the Mandailing Tribe Culture in North Sumatra. The development research uses the ADDIE Model by integrating the Local Culture of the Mandailing Tribe in North Sumatra in developing the Mathematics LKPD for Grade VII Junior High Schools based on students' initial perceptions of the current condition of Generation Z. The use of the Case Method approach aims to improve students' critical thinking skills based on the cases presented in the teaching materials.

Developing an Interactive E-Book on Statistics Based on a Realistic Mathematical Approach Assisted by The SIPDA Learning Management System Prihatin Ningsih Sagala; Eri Widyastuti
International Journal on Emerging Mathematics Education IJEME, Vol. 6 No. 2, September 2022
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/ijeme.v6i2.21027

The government policy in March 2020 regarding the application of online learning has significant changes in the learning process on campus. One of them is by changing teaching materials from textbooks to e-books, which is a must as a form of adjustment related to campus conditions that implement full online learning using LMS SIPDA. The objectives of this study are: (1) Producing an interactive e-book on basics statistics based on Realistic Mathematics assisted by the SIPDA LMS developed by using a valid and practical Kvisoft Flipbook Maker (2) To determine the effectiveness of the e-book Basics of Statistics in improving student problem-solving abilities. This type of research is Research and Development with the ADDIE development model, namely analysis, design, development, implementation, and evaluation. E-book development using the Kvisoft Flipbook Maker Application. The results of the e-book development at the needs analysis stage showed that 85% of students needed integrated learning media. SIPDA integrated e-books can increase student attendance and activities by 60%. At the product design stage, the e-book in the form of a word file is converted into a PDF file and then developed using Kvisoft Flipbook Maker by adding videos, images, and other files. The e-book is validated with a validity rate of 92% by material experts and 89% by media experts. The value of practicality is seen from two things, namely: (1) Questionnaire for responses from media experts and two practitioner lecturers, it was found that the e-book developed could be applied in the good category (3.92) and met the practical criteria (80%) used in the online learning era. (2) The student response questionnaire in a small group of 10 people obtained the category Good (3.96) and very practical (85%). The percentage of student response questionnaire results at the implementation stage of the SIPDA class showed a positive response of 87.6%. The effectiveness aspect is seen from the average individual learning completeness of 71.42 with classical completeness criteria obtained by 91. And the N-Gain score was 0.71 in high category.

PENGARUH MODEL PEMBELAJARAN FLIPPED CLASSROOM TIPE PEER INSTRUCTION FLIPPED BERBANTUAN VIDEO PEMBELAJARAN TERHADAP KEMAMPUAN PEMECAHAN MASALAH DAN KEMANDIRIAN BELAJAR Auliza, Elsa; Widyastuti, Eri
MES: Journal of Mathematics Education and Science Vol 9, No 2 (2024): Edisi April
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/mes.v9i2.8592

This study aims to determine the effect of the peer instruction flipped classroom type learning model assisted by learning videos on problem solving skills and student learning independence. This type of research is Quasi Experimental with nonequivalent control group design. This research was conducted at SMP Negeri 1 Perbaungan. The study population amounted to 275 students and the sample amounted to 60 students. Problem solving ability data were collected using tests and learning independence data were collected using questionnaires. The data were analyzed using independent T test. After testing the data on problem solving ability and learning independence, it was found that the alternative hypothesis was accepted. To determine the influence of the independent variable on the dependent variable, the cohen's test was conducted. Based on the cohen's test, it was found that the peer instruction flipped classroom learning model assisted by learning videos had an effect of 86% on students' problem-solving ability and an effect of 82% on students' learning independence.

Animated Mathematics Learning Media on guru.tesonlineku.com using Plotagon Story and Lectora Inspire Sagala, Prihatin Ningsih; Septiana, Dian; Widyastuti, Eri
Jurnal Ilmu Pendidikan Vol 30, No 1 (2024): June
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um048v30i1p29-39

This research aims to develop animated story-learning media that helps students improve their understanding of mathematical concepts. This research uses the ADDIE development (R and D) method, which consists of analysis, design, development, implementation, and evaluation stages. The sample research subjects consisted of 6 experts, two material, media, and language validator experts each, one teacher, 5 and 147 class VII students who assessed the practicality and effectiveness of the product being developed. Data was collected through expert validation, interviews with teachers, teacher and student response tests, and tests on students. At the same time, the N-Gain test was used to evaluate media effectiveness. Expert validation results show that the criteria are very valid, with an average score of 89 percent. The teacher and student response test showed an average score of 86 percent, which shows that the animated story media is practically used for mathematics learning. The N-Gain test of 67 percent shows that students' ability to understand mathematical concepts is increasing. Therefore, using animated stories to develop skills in understanding mathematical concepts is feasible, practical, and effective

MENGINTEGRASIKAN SEJARAH MATEMATIKA DAN PENDEKATAN GEOMETRIS DALAM PEMAHAMAN PERSAMAAN KUADRAT Widyastuti, Eri; Wardahlia, Firli; Sinaga, Irene Yoseva; Khazanah, Khazanah; br Jawak, Lady Christine Elizabeth; Sirait, Nazla Annisa Gunawan; Tampubolon, Polin Jeremia
MES: Journal of Mathematics Education and Science Vol 10, No 1 (2024): Edisi Oktober
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/mes.v10i1.10203

This study explores the integration of the history of mathematics and geometric approaches in enhancing students' understanding of quadratic equations. The research indicates that students who engage in this learning process can establish connections between geometric manipulations and algebraic symbols used in quadratic equations. By converting geometric forms into algebraic expressions and vice versa, students gain a deeper understanding of concepts such as factorization and perfect square solutions. The integration of historical mathematics and geometric approaches proves to be effective in improving students' conceptual understanding and overcoming learning barriers. Visualizations, particularly through methods Geometry, allow students to build a more intuitive understanding of quadratic equations, thereby increasing their interest and motivation in learning

PELATIHAN DAN PENERAPAN INOVASI PEMBELAJARAN BERBASIS STEM DAN TPACK UNTUK GURU SD DI KABUPATEN SERDANG BEDAGAI Widyastuti, Eri; Marpaung, Faridawaty; Yuhdi, Achmad; Harahap, Delviananda; Ardhi Arridho, Achmad; Audryetta, Shana; Zaki Ulwi, Muhammad
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 7, No 11 (2024): MARTABE : JURNAL PENGABDIAN MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v7i11.4841-4851

Indonesia sebagai negara besar dengan jumlah penduduk sebanyak 40% di kawasan regional MEA perlu berbenah dalam usaha menciptakan tenaga kerja produktif yang handal. Untuk menjawab tantangan besar yang akan dihadapi pada abad 21 diperlukan kajian kerangka teoritis dalam hal penggunaan teknologi informasi dan komunikasi oleh guru melalui STEM dan Technological Pedagogical Content Knowledge (TPACK). STEM dan TPACK merupakan dua pendekatan pembelajaran yang dapat diintegrasikan dalam pembelajaran sebagai fasilitas belajar dan mengajar di kelas mulai Sekolah Dasar sampai tingkat Universitas. Dalam mendukung upaya Dinas Pendidikan Kabupaten Serdang Bedagai untuk mewujudkan Sekolah Mantab atau Mandiri, Terampil, Asri, dan Berkualitas; Tim Pemberdayaan Kemitraan Masyarakat (PKM) Unimed melaksanakan Pelatihan inovasi pembelajaran berbasis STEM dan TPACK untuk guru-guru di SD Negeri 106193 Bakaran Batu pada tanggal 21-22 September 2024. Kegiatan ini bertujuan untuk meningkatkan kompetensi guru dengan menerapkan STEM dan TPACK pada pembelajaran di kelas. Metode pelaksanaan program ini terdiri dari beberapa tahap yaitu: Pra Pelatihan, Persiapan Pelatihan, Pelaksanaan Pelatihan STEM dan TPACK, Penerapan Hasil Pelatihan, Monitoring dan Evaluasi, Pengolahan Data, Peaporan, serta Publikasi. Hasil dari kegiatan ini adalah peningkatan kualitas pembelajaran Guru SD di Kecamatan Pantai Cermin yang ditandai dengan peningkatan kualitas perangkat ajar yang disusun guru-guru dan dalam mempraktekkannya di dalam kelas.

Developing an Interactive E-Book on Statistics Based on a Realistic Mathematical Approach Assisted by The SIPDA Learning Management System Sagala, Prihatin Ningsih; Widyastuti, Eri
International Journal on Emerging Mathematics Education IJEME, Vol. 6 No. 2, September 2022
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/ijeme.v6i2.21027

The government policy in March 2020 regarding the application of online learning has significant changes in the learning process on campus. One of them is by changing teaching materials from textbooks to e-books, which is a must as a form of adjustment related to campus conditions that implement full online learning using LMS SIPDA. The objectives of this study are: (1) Producing an interactive e-book on basics statistics based on Realistic Mathematics assisted by the SIPDA LMS developed by using a valid and practical Kvisoft Flipbook Maker (2) To determine the effectiveness of the e-book Basics of Statistics in improving student problem-solving abilities. This type of research is Research and Development with the ADDIE development model, namely analysis, design, development, implementation, and evaluation. E-book development using the Kvisoft Flipbook Maker Application. The results of the e-book development at the needs analysis stage showed that 85% of students needed integrated learning media. SIPDA integrated e-books can increase student attendance and activities by 60%. At the product design stage, the e-book in the form of a word file is converted into a PDF file and then developed using Kvisoft Flipbook Maker by adding videos, images, and other files. The e-book is validated with a validity rate of 92% by material experts and 89% by media experts. The value of practicality is seen from two things, namely: (1) Questionnaire for responses from media experts and two practitioner lecturers, it was found that the e-book developed could be applied in the good category (3.92) and met the practical criteria (80%) used in the online learning era. (2) The student response questionnaire in a small group of 10 people obtained the category Good (3.96) and very practical (85%). The percentage of student response questionnaire results at the implementation stage of the SIPDA class showed a positive response of 87.6%. The effectiveness aspect is seen from the average individual learning completeness of 71.42 with classical completeness criteria obtained by 91. And the N-Gain score was 0.71 in high category.

OPTIMIZATION OF MEDAN CITY WASTE TRANSPORTATION SYSTEM USING MULTIPLE-TRIP VEHICLE ROUTING PROBLEM (MTVRP) MODEL AND SIMULATED ANNEALING Marpaung, Faridawaty; Arnita, Arnita; Dewi, Sri; Sinaga, Marlina Setia; Widyastuti, Eri
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 19 No 4 (2025): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol19iss4pp3059-3072

Medan generates approximately 2,000 tons of waste daily, yet only 800 tons are successfully transported to landfills, indicating significant inefficiencies in waste transportation. This study addresses the issue by applying the Vehicle Routing Problem with Multiple Trips (VRPMT) combined with the Simulated Annealing (SA) algorithm to optimize waste transport operations. The VRPMT model allows each vehicle to make multiple daily trips, enhancing fleet utilization while ensuring that all service points are visited, vehicle capacities are not exceeded, and vehicles return to the depot after each trip. The study focuses on Tegal Sari Mandala II (TSM II), Medan Denai, a densely populated neighborhood with narrow roads that require bestari pedicabs for flexible waste collection. Data includes waste collection points, vehicle capacities, transport frequencies, and operational costs. The SA algorithm begins with a random route solution, then iteratively evaluates and improves it by minimizing total distance and cost. It also avoids local optima through a controlled temperature reduction process. Results demonstrate significant improvements: total travel distance was reduced from 12,500 meters to 8,646 meters (a 30.8% reduction), and operational costs decreased from IDR 12,000 to IDR 8,946 (a 25.5% reduction). On average, each bestari pedicab completed two daily trips, maximizing capacity utilization and minimizing penalty costs. The system integrates a structured database and Google Maps API for route visualization, enhancing planning and monitoring. Overall, this approach contributes to more efficient, cost-effective, and environmentally friendly waste transportation. It supports climate action goals and provides a scalable, replicable model for sustainable urban waste management in other regions facing similar logistical challenges. However, this study has some limitations. The VRPMT model was applied only in a neighborhood with a limited vehicle type, which may reduce its generalizability to broader urban areas with more complex logistics. Also, the Simulated Annealing algorithm settings were manually tuned and not benchmarked against other metaheuristic methods. Future studies could improve the model by considering dynamic traffic conditions, integrating real-time data, or testing hybrid optimization approaches to enhance its effectiveness and adaptability.

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