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Exploration of Teachers' Difficulties in Managing Mathematics Learning on Sumatra Island Simanjuntak, Sinta Dameria; Fadilah, Nina; Sembiring, Ribka Kariani; Sitompul, Pardomuan
International Journal of Trends in Mathematics Education Research Vol 7, No 4 (2024)
Publisher : SAINTIS Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33122/ijtmer.v7i4.345

This research explores the difficulties faced by mathematics teachers in Sumatra Island in managing learning. Using a descriptive qualitative approach, the research involved 91 junior high school teachers through written interviews with 10 open-ended questions. The research results revealed several main difficulties: limited understanding of the independent curriculum, challenges in developing teaching modules, difficulties in determining learning objectives from cognitive-affective-psychomotor aspects, challenges in designing learning that facilitates social-economic-cultural-religious aspects, and obstacles in implementing teaching methods that meet students' needs. Nevertheless, teachers have demonstrated good abilities in time management, facilitating student collaboration, providing feedback, and conducting learning reflections.

The Application of the Discovery Learning Model to Improve the Mathematical Problem-Solving Abilities of Eighth Grade Students at SMP Negeri 31 Medan Simanjuntak, Sinta Dameria; Sinaga, Ewilda; Manurung, Nurhalimah; Capah, Syafwani Sadanta; Harahap, Yanti Pertiwi; Sitanggang, Derma Yanti; Simatupang, Esra Ayu Lamria; Tarigan, Yenni Andryani
International Journal of Trends in Mathematics Education Research Vol 7, No 4 (2024)
Publisher : SAINTIS Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33122/ijtmer.v7i4.352

This study aims to improve the mathematical problem solving ability of students in class VIII-4 at SMP Negeri 31 Medan through the application of the Discovery Learning model. This research is a Classroom Action Research (PTK) which was conducted in two cycles. The research subjects were 30 students of class VIII-4, while the research object was the improvement of mathematical problem solving ability through Discovery Learning model. The results showed an increase in students' mathematical problem solving skills from cycle I to cycle II. In the initial test, the average student score was 45.22 with a completeness rate of only 13.33%. After the application of Discovery Learning in cycle I, the average score increased to 66 with a completeness rate of 56.67%. In cycle II, the average score reached 82.66 with a completion rate of 86.67%. Thus, the use of the Discovery Learning model proved to be effective in improving students' mathematical problem solving skills on the material of Linear Equation One Variable.

Profiling 4C Skills Through PISA-Based Mathematics Tasks: A Contextual Analysis of Junior High School Students Simanjuntak, Sinta Dameria; Saragih, Sahat; Sitepu, Israil; Noverica, Sondang
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 13, No 2: April 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v13i2.15294

The 4C skills—Critical Thinking, Creativity, Communication, and Collaboration—are essential for preparing students to navigate 21st-century challenges. However, results from PISA 2022 and Indonesia's Education Report 2024 reveal that foundational competencies remain low, particularly in rural contexts. This study aims to explore the manifestation of 4C skills among ninth-grade students at SMP Budhi Dharma Balige, North Sumatra, through performance on PISA-based mathematics questions. Employing a qualitative descriptive design, data were collected from 31 students using two PISA tasks and an unstructured teacher interview. Responses were assessed using a rubric-informed framework, and analysis followed the Miles and Huberman model. Results show that while students demonstrate strong communication and procedural reasoning (96.77% correct in Q1 Part 2), performance in critical thinking and argumentation remains limited (only 35% success in Q2 Part 3). The main barrier is the lack of integrated instructional strategies that promote higher-order and collaborative learning. The study concludes that while 4C skills are beginning to develop, their progression is fragmented and requires targeted pedagogical reforms. Recommendations include the use of project-based learning, culturally responsive instruction, and formative assessments to ensure equitable 4C development in under-resourced schools.

The Influence of the Problem-Based Learning Model Based on Song Media on Student Learning Outcomes in Science Learning in Class V Elementary Schools Juliana Siregar, Santi; Janson Silaban, Patri; Dameria Simanjuntak, Sinta; Wulan Sari HS, Dyan; Juliana
Jurnal PAJAR (Pendidikan dan Pengajaran) Vol. 8 No. 6 (2024): November
Publisher : Laboratorium Program Studi Pendidikan Guru Sekolah Dasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33578/pjr.v8i6.10013

Students who experience learning difficulties in natural science (science) lessons obtain unsatisfactory learning results and grades that do not fulfil the KKM. Quantitative research method is a research method based on positive philosophy which is used to examine research instruments and quantitative/statistical data analysis, with the aim of testing predetermined hypotheses. In this research, researchers used experimental methods. The student's natural science (science) learning outcomes before being given treatment obtained an average score of 60.46. The normality test result is 0.150, so it can be concluded that the pre-test learning results are normally distributed. The student's natural science (science) learning outcomes after being given treatment obtained an average score of 82.46. The normality test result is 0.094, so it can be concluded that the post-test learning results are normally distributed. This can be proven with a correlation coefficient value of 0.960 which is a very strong interpenetration. The results of the T-test calculation to find out whether the hypothesis is accepted or rejected, the tcount 16,830 is greater than ttable 1,706, which means that there is an influence of Problem-Based Learning Based on Song Media on student learning outcomes. Thus, Ha is accepted and Ho is rejected.

IMPLEMENTASI MODEL PEMBELAJARAN BERBASIS MASALAH UNTUK MENINGKATKAN KEMAMPUAN LITERASI NUMERASI MATEMATIS SISWA SMP NEGERI 30 MEDAN Sinabang, Esra; Simanjuntak, Sinta Dameria; Imelda, Imelda
CARTESIUS : Jurnal Pendidikan Matematika Vol 6 No.1 Tahun 2023
Publisher : Unika Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar

This study aims to determine whether the implementation of problem-based learning models can improve students' mathematical numeracy literacy skills in class VIII SMP Negeri 30 Medan. This research method uses Classroom Action Research (CAR). The research procedure is in the form of a cycle. Each cycle consists of 4 stages, namely: planning, implementation of action, observation and reflection. Data collection techniques through observation and tests. This data collection uses several instruments in the form of teacher observation sheets, student observation sheets. Meanwhile, to determine the ability of students' mathematical numeracy literacy tests were used. The results showed that the use of problem-based learning models can improve students' mathematical numeracy literacy skills in the mathematics subject matter of cubes and blocks. From the average initial ability score of 50, the average value of students' mathematical numeracy literacy ability in cycle I is 64 and the average value of students' mathematical numeracy literacy ability in cycle II is 78 and the average value of teacher and student activities in cycle I is 63% and 55%, and cycle II, namely 83% and 82%.

PENGARUH PENDEKATAN PEMBELAJARAN MATEMATIS REALISTIK TERHADAP KEMAMPUAN PEMECAHAN MASALAH MATEMATIS SISWA KELAS VIII SMP KATOLIK TRI SAKTI 2 MEDAN Pane, Rezeki Noris; Simanjuntak, Sinta Dameria; Sihombing, Imelda
CARTESIUS : Jurnal Pendidikan Matematika Vol 6 No.2 Tahun 2023
Publisher : Unika Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Penelitian ini bertujuan untuk mengetahui apakah terdapat pengaruh pendekatan pembelajaran matematika realistik terhadap kemampuan pemecahan masalah matematis siswa dan apakah rata-rata kemampuan pemecahan masalah matematis siswa yang menggunakan pendekatan pembelajaran matematika realistik lebih baik daripada rata-rata kemampuan pemecahan masalah matematis menggunakan pendekatan konvensional. Metode Penelitian ini menggunakan metode penelitian kuantitatif. Prosedur penelitian ini terdiri dari 3 tahap yaitu tahap persiapan, tahap pelaksanaan, dan tahap pengolahan data. Teknik pengumpulan data berupa tes dan observasi. Hasil penelitian ini adalah terdapat pengaruh pendekatan pembelajaran matematika realistik terhadap kemampuan pemecahan masalah matematis siswa dan rata-rata kemampuan pemecahan masalah matematis yang menggunakan pendekatan pembelajaran matematika realistik lebih baik daripada rata-rata kemampuan pemecahan masalah matematis siswa yang menggunakan pendekatan konvensional. Dengan nilai rata-rata kelas eksperimen yaitu 80,9 dan rata rata kelas control yaitu 72,7. Dengan taraf signifikan sebesar 0,002 lebih kecil daripada 0,05, dan t hitung > t tabel (3,21 > 2,042), itu artinya Ho ditolak dan Ha diterima

IMPLEMENTASI MODEL PEMBELAJARAN BERBASIS MASALAH UNTUK MENINGKATKAN KEMAMPUAN LITERASI NUMERASI MATEMATIS SISWA SMP NEGERI 30 MEDAN Sinabang, Esra; Simanjuntak, Sinta Dameria; Imelda, Imelda
CARTESIUS : Jurnal Pendidikan Matematika Vol 6 No.1 Tahun 2023
Publisher : Unika Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar

This study aims to determine whether the implementation of problem-based learning models can improve students' mathematical numeracy literacy skills in class VIII SMP Negeri 30 Medan. This research method uses Classroom Action Research (CAR). The research procedure is in the form of a cycle. Each cycle consists of 4 stages, namely: planning, implementation of action, observation and reflection. Data collection techniques through observation and tests. This data collection uses several instruments in the form of teacher observation sheets, student observation sheets. Meanwhile, to determine the ability of students' mathematical numeracy literacy tests were used. The results showed that the use of problem-based learning models can improve students' mathematical numeracy literacy skills in the mathematics subject matter of cubes and blocks. From the average initial ability score of 50, the average value of students' mathematical numeracy literacy ability in cycle I is 64 and the average value of students' mathematical numeracy literacy ability in cycle II is 78 and the average value of teacher and student activities in cycle I is 63% and 55%, and cycle II, namely 83% and 82%.

PENGARUH PENDEKATAN PEMBELAJARAN MATEMATIS REALISTIK TERHADAP KEMAMPUAN PEMECAHAN MASALAH MATEMATIS SISWA KELAS VIII SMP KATOLIK TRI SAKTI 2 MEDAN Pane, Rezeki Noris; Simanjuntak, Sinta Dameria; Sihombing, Imelda
CARTESIUS : Jurnal Pendidikan Matematika Vol 6 No.2 Tahun 2023
Publisher : Unika Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Penelitian ini bertujuan untuk mengetahui apakah terdapat pengaruh pendekatan pembelajaran matematika realistik terhadap kemampuan pemecahan masalah matematis siswa dan apakah rata-rata kemampuan pemecahan masalah matematis siswa yang menggunakan pendekatan pembelajaran matematika realistik lebih baik daripada rata-rata kemampuan pemecahan masalah matematis menggunakan pendekatan konvensional. Metode Penelitian ini menggunakan metode penelitian kuantitatif. Prosedur penelitian ini terdiri dari 3 tahap yaitu tahap persiapan, tahap pelaksanaan, dan tahap pengolahan data. Teknik pengumpulan data berupa tes dan observasi. Hasil penelitian ini adalah terdapat pengaruh pendekatan pembelajaran matematika realistik terhadap kemampuan pemecahan masalah matematis siswa dan rata-rata kemampuan pemecahan masalah matematis yang menggunakan pendekatan pembelajaran matematika realistik lebih baik daripada rata-rata kemampuan pemecahan masalah matematis siswa yang menggunakan pendekatan konvensional. Dengan nilai rata-rata kelas eksperimen yaitu 80,9 dan rata rata kelas control yaitu 72,7. Dengan taraf signifikan sebesar 0,002 lebih kecil daripada 0,05, dan t hitung > t tabel (3,21 > 2,042), itu artinya Ho ditolak dan Ha diterima

Hakikat Matematika dalam Ruma Bolon Suku Batak Toba Simanjuntak, Sinta Dameria; Dewi, Izwita; Ahyaningsih, Faiz; Sitepu, Israil
Indiktika : Jurnal Inovasi Pendidikan Matematika Vol. 7 No. 2 (2025): Indiktika : Jurnal Inovasi Pendidikan Matematika
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/indiktika.v7i2.17010

Ruma Bolon adalah rumah tradisional kebanggaan Suku Batak Toba yang memiliki nilai budaya dan gaya bangunan yang unik. Tujuan dari penelitian ini adalah untuk mengkaji nilai matematika yang terkandung dalam pembuatan dan desain Ruma Bolon, serta mendeskripsikan bagaimana nilai-nilai matematika tersebut mencerminkan konsep geometri dan proporsi yang ada dalam bangunan Ruma Bolon dari suku Batak Toba. Pendekatan etnomatematika digunakan untuk menyelidiki bagaimana konsep-konsep matematika berhubungan dengan elemen-elemen bangunan tradisional suku Batak Toba ini, seperti simetri, bentuk geometris pada struktur bangunan, dan pola ukiran. Hasil penelitian menunjukkan bahwa Ruma Bolon tidak hanya berfungsi sebagai tempat tinggal, tetapi juga memiliki simbolisme matematika yang dalam dan unik. Simbolisme ini mencerminkan keseimbangan di langit yaitu kaitannya dengan Mula Jadi Nabolon, keseimbangan dalam kehidupan sosial atau bermasyarakat, dan penghormatan kepada alam dan leluhur sebagai suatu kesatuan yang utuh. Studi ini menghasilkan kesimpulan bahwa matematika dalam bangunan Ruma Bolon bukan sekadar estetika, tetapi juga merupakan manifestasi dari nilai-nilai budaya yang mengakar kuat dan bermakna yang dalam untuk kehidupan masyarakat Batak Toba.

When Students Encounter PISA Questions: From the Perspective of 4C Skills Simanjuntak, Sinta Dameria; Saragih, Sahat
RANGE: Jurnal Pendidikan Matematika Vol. 7 No. 1 (2025): Range Juli 2025
Publisher : Pendidikan Matematika UNIMOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jpm.v7i1.9385

PISA is a prestigious platform for assessing students' learning achievements globally, including 4C skills: creative thinking, critical thinking, communication, and collaboration. However, the 2022 PISA results once again showed disappointing achievements for Indonesia. Indonesian students struggle with solving complex problems (critical thinking), have difficulty conveying ideas effectively (communication), are less prepared for creative challenges (creative thinking), and lack effective collaborative learning approaches. This research aimed to analyze the 4C skills of students at SMP Negeri 31 Medan. The study involved 29 students from class IX-3. Data were collected using two selected essay questions from the 2022 PISA mathematics test, specifically designed to assess 4C skills through indicators like interpreting, formulating, and reasoning. Collaboration was assessed through semi-structured interviews with the class teacher to gain insights into students' interaction and teamwork skills, complementing the written test results. Qualitative descriptive analysis was used to interpret students' written responses, while collaboration data were analyzed based on teacher observations. Assessment criteria followed established indicators for critical thinking (Employ and Evaluate), creativity (formulate), communication (interpret), and collaboration (effective teamwork). The results indicate that 69.56% of students correctly answered interpretation questions (communication, level 3), 39.13% and 43.47% answered employability questions correctly (critical thinking, levels 2 and 1a), and 30.43% correctly answered formulation questions (creativity, level 2). However, teacher observations revealed that students still struggle with effective collaboration, reflecting a broader challenge in fostering teamwork and peer learning. Overall, although communication skills are relatively strong, significant improvements are needed in critical thinking, creativity, and collaboration.

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