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All Journal Jurnal Cendekia : Jurnal Pendidikan Matematika Journal on Education de Fermat : Jurnal Pendidikan Matematika Jurnal Sains Riset SOSCIED Frontiers Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Jurnal Riset dan Inovasi Pembelajaran MARISEKOLA: Jurnal Matematika Riset Edukasi dan Kolaborasi Dharmas Education Journal (DE_Journal) ADIBA: Journal of Education Jurnal Ilmiah Sains Jurnal Pendidikan dan Keguruan
Pitoy, Cori
Jurusan Matematika, Fakultas Matematika, Ilmu Pengetahuan Alam Dan Kebumian, Universitas Negeri Manado, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Pengaruh Kreativitas Belajar dan Kecerdasan Logika Matematika terhadap Hasil Belajar Matematika Siswa Putri, Febriyani R.D.; Tilaar, Anetha L.F.; Pitoy, Cori
MARISEKOLA: Jurnal Matematika Riset Edukasi dan Kolaborasi Vol. 4 No. 1: April 2023
Publisher : Jurusan Matematika FMIPA Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/marisekola.v4i1.1885

Abstract

Tujuan penelitian ini adalah untuk mengetahui ada atau tidaknya 1. Pengaruh kreativitas belajar terhadap hasil belajar matematika siswa; 2. Pengaruh kecerdasan logika matematika terhadap hasil belajar matematika siswa; dan 3. Pengaruh kreativitas belajar dan kecerdasan logika matematika secara bersamaan terhadap hasil belajar matematika siswa. Dalam penelitian ini menggunakan metode survei dengan pendekatan kuantitatif. Seluruh siswa kelas XI IPA SMA Lokon St. Nikolaus Tomohon tahun ajaran 2020/2021 dengan jumlah 64 orang siswa menjadi populasi dalam penelitian ini dan sampel pada penelitian ini sebanyak 39 siswa. Untuk data kreativitas belajar didapat melalui angket dengan skala Likert, dan untuk data kecerdasan logika matematika diperoleh melalui tes dalam bentuk soal objektif, sedangkan untuk data hasil belajar matematika siswa didapatkan dari dokumentasi hasil ulangan harian mata pelajaran matematika pada materi Persamaan Trigonometri di semester genap pada tahun ajaran 2020/2021 dari guru mata pelajaran matematika di tempat penelitian. Dalam penelitian ini teknik penelitian yang digunakan adalah teknik analisis regresi sederhana dan analisis regresi berganda dan dilanjutkan dengan analisis korelasi untuk memperoleh koefisien determinasi. Untuk hasil penelitian yang diperoleh yaitu terdapat pengaruh positif dari kreativitas belajar terhadap hasil belajar matematika siswa dengan kontribusi sebesar 16,8% yang secara signifikan ditunjukkan dari Sig. < 0,05, terdapat pengaruh positif kecerdasan logika matematika terhadap hasil belajar matematika siswa dengan kontribusi  sebesar 23,8% secara signifikan ditunjukkan dari Sig..< 0,05 dan tidak terdapat pengaruh kreativitas belajar dan kecerdasan logika matematika secara bersamaan terhadap hasil belajar matematika siswa.
Analisis Kesalahan Siswa dalam Menyelesaikan Soal-Soal Matematika Pokok Bahasan Operasi Bentuk Aljabar Kelas VII Sinaga, Sara N.; Pitoy, Cori; Pulukadang, Rosiah J.
MARISEKOLA: Jurnal Matematika Riset Edukasi dan Kolaborasi Vol. 5 No. 1: April 2024
Publisher : Jurusan Matematika FMIPA Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/marisekola.v5i1.2412

Abstract

Penelitian ini bertujuan untuk mendiagnosa kesalahan siswa kelas VII SMP Negeri 2 Tondano dalam menyelesaikan soal-soal matematika pokok bahasan operasi bentuk aljabar. Jenis penelitian ini yaitu penelitian deskriptif dengan menggunakan pendekatan kualitatif. Hasil penelitian ini menunjukkan bahwa terdapat 3 soal yang dikatakan dapat dijawab benar oleh siswa yaitu pada soal nomor 1,2, dan 3, soal yang dikatakan tidak dapat dijawab oleh siswa yaitu dari soal nomor 5 sampai nomor 10 serta pada soal nomor 4 terjadi banyak kesalahan. Dari keempat jenis kesalahan siswa dalam menyelesaikan soal-soal operasi bentuk aljabar, kesalahan yang paling sering terjadi yaitu kesalahan fakta dengan persentase untuk tingkat kesulitan rendah 75%, sedang 75,64%, tinggi 77,63%,  disusul oleh kesalahan konsep dengan persentase untuk tingkat kesulitan rendah 40%, sedang 65,38%, tinggi 65,79%, setelah itu kesalahan prinsip dengan persentase untuk tingkat kesulitan rendah 5%, sedang 37,18%, tinggi 6,58%, sedangkan kesalahan terendah yang dialami siswa yaitu kesalahan operasi dengan persentase untuk tingkat kesulitan rendah 0%, sedang 23,08%, tinggi 1,32%. Kesimpulan yang dapat ditarik dari penelitian ini yaitu jenis kesalahan fakta dan konsep merupakan jenis kesalahan yang paling sering terjadi, untuk itu siswa masih perlu banyak berlatih soal mengenai materi operasi bentuk aljabar yang berkaitan dengan jenis kesalahan tersebut agar dapat membantu memperbaiki kesalahan yang telah terjadi.
PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE SNOWBALL THROWING TERHADAP HASIL BELAJAR SISWA PADA MATERI OPERASI BENTUK ALJABAR DI KELAS VII SMP NEGERI 2 TONDANO Hanna Juwita Sembiring; Philotheus E. A Tuerah; Cori Pitoy
SOSCIED Vol 8 No 2 (2025): SOSCIED - November 2025
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/jsoscied.v8i2.1081

Abstract

This study aims to determine whether there is an effect of applying the Snowball Throwing cooperative learning model on mathematics learning outcomes in grade VII on the subject of Algebraic Operations at SMP Negeri 2 Tondano using quantitative research through an experimental method with two classes randomly selected as subjects. The research instrument was a post-test consisting of multiple-choice and essay questions that had been tested for validity and reliability. From the hypothesis testing using the t-test, tcount = 5.567 > ttable = 2.023, which means rejecting Ho. Therefore, it can be concluded that the average learning outcomes of students on the subject of algebraic operations using the Snowball Throwing model are higher than the average learning outcomes of students using the conventional learning model.
PENERAPAN MODEL PROBLEM BASED LEARNING PADA PEMBELAJARAN MATEMATIKA MATERI STATISTIKA Angelinus Aurolio Pelealu; Cori Pitoy; Anneke Pesik
JURNAL PENDIDIKAN DAN KEGURUAN Vol. 1 No. 1 (2023): Jurnal Pendidikan dan Keguruan
Publisher : CV. ADIBA AISHA AMIRA

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

Abstract

The purpose of this study is to see the difference in the average learning outcomes of mathematics in statistics materials using the Problem Based Learning learning model and the direct learning model. The type of research used is pseudo-experimentation. The research design used is The Matching Only Posttest Control Group Design. The sample consisted of 2 normal and homogeneous classes determined through lottery, class VIII A totaled 16 students as an experimental class and class VIII B totaled 16 students as a control class located at Rurukan Christian Junior High School in Tomohon city. The average statistical learning outcomes of experimental class students were 83.63 and the average learning outcomes of control class students were 78.44. The study statistics used a t-test with tcount = 3.44 > ttable = 1.69 with a real level of α = 0.05. It is concluded that the average learning outcomes using the Problem Based Learning learning model are more than the average learning outcomes using the direct learning model.
ANALISIS KESALAHAN SISWA DALAM MENYELESAIKAN SOAL PADA MATERI OPERASI BENTUK ALJABAR Anna Lucia Rengkung; Anekke Pesik; Cori Pitoy
JURNAL PENDIDIKAN DAN KEGURUAN Vol. 1 No. 1 (2023): Jurnal Pendidikan dan Keguruan
Publisher : CV. ADIBA AISHA AMIRA

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

Abstract

English The study aims to analyze the types of errors made by students in solving algebraic operations material questions for class VII SMP Dominico Savio Manado and to find out the factors that cause students to make these mistakes. The type of research used in this research is descriptive qualitative. Data collection techniques were carried out by giving tests and inetrviews. The results of the analysis in this study indicate the types of errors made by class VII students of SMP Dominico Savio Manado in solving problems on the operation material of algebric forms, namely conceptual errors of 66,67%, procedural errors of 55,55%, and computational errors 83,33%. The factors that cause students to make mistakes, namely students do not understand the meaning of the questions given, students are less careful in performing arithmetic operations, and students are in a hurry to solve questions abaout operations in algebraic forms.
Penerapan Model Osborn dalam Pembelajaran Matematika Materi Bentuk Aljabar di Kelas VII SMP Negeri 3 Tondano Leonardus Turang; Cori Pitoy; James Mangobi
Jurnal Cendekia : Jurnal Pendidikan Matematika Vol 10 No 2 (2026): Jurnal Cendekia: Jurnal Pendidikan Matematika Volume 10 Nomor 2 Tahun 2026
Publisher : Mathematics Education Study Program

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cendekia.v10i2.4986

Abstract

Kesulitan siswa memahami konsep aljabar menjadi latar belakang penelitian ini sehingga tujuan penelitian ini untuk mengetahui apakah rata-rata hasil belajar setelah diterapkan model Osborn lebih baik dari model pembelajaran langsung pada materi bentuk aljabar. Penelitian menggunakan pendekatan kuantitatif dengan metode quasi-experiment dan desain Posttest Only Control Group Design. Pengumpulan data dilakukan melalui tes tertulis berupa 5 soal uraian. Sampel diambil dari 2 kelas yaitu kelas VII A sebagai kelas kontrol dengan 22 siswa dan kelas VII B sebagai kelas eksperimen dengan 22 siswa, dipilih menggunakan teknik random sampling setelah dilakukan uji homogenitas dan uji kesamaan. Teknik analisis data menggunakan uji-t sampel independen. Validitas instrumen diverifikasi oleh validator ahli meliputi dosen dan guru matematika. Hasil penelitian menunjukkan rata-rata nilai posttest kelas eksperimen (88,73) lebih tinggi secara signifikan dibandingkan kelas kontrol (77,59), dengan thitung = 21,35 > ttabel= 2,018 pada α = 0,05. Hal ini menunjukkan bahwa model Osborn secara signifikan meningkatkan hasil belajar siswa pada materi bentuk aljabar dibandingkan model pembelajaran langsung.
PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING TERHADAP HASIL BELAJAR SISWA PADA MATERI PERSAMAAN GARIS LURUS KELAS VIII SMP NEGERI 2 TONDANO Aprilita Majesty Lumanauw; Cori Pitoy; Rosauli R Samosir
SOSCIED Vol 9 No 1 (2026): SOSCIED - Juli 2026
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/9rvgsc30

Abstract

This study aims to determine whether there is a difference between the average learning outcomes of students students taught using the Problem-Based Learning model and those taught using the direct instruction model on the topic of Linear Equations. The research design employed was a Pretest–Posttest Control Group Design. The sample consisted of class VIII B with 24 students as the experimental group and class VIII C with 20 students as the control group. The data analysis technique used was the t-telst. Based on the t-test results with a significance level of ( ), the obtained value was = 3,9699 > = 2,018, indicating that  is rejected and  is accepted. This mean that there is a difference between thel average learning outcomes of students taught using the Problem-Based Learning (PBL) model and those taught using the direct instruction model on the topic of Linear Equations
KESIAPAN GURU DALAM MENGIMPLEMENTASIKAN ASESMEN DIAGNOSTIK PADA PEMBELAJARAN MATEMATIKA DI SMP NEGERI 4 TONDANO Damopolii, Matthew Clay Immanuel; Pulukadang, Rosiah Juliati; Pitoy, Cori
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2505

Abstract

This study aims to determine teachers’ readiness in implementing diagnostic assessment in mathematics learning at SMP Negeri 4 Tondano. This research employed a qualitative approach with a case study design. The subjects of the study consisted of three mathematics teachers who had implemented diagnostic assessment in their teaching. Data collection techniques included in-depth interviews, classroom observations, and documentation of diagnostic assessment instruments and blueprints. The data were then analyzed using the interactive data analysis model by Miles and Huberman, which involves data reduction, data display, and conclusion drawing. To ensure data validity, source and technique triangulation were applied. The results showed that teachers’ readiness falls into the sufficient category. Two teachers (Mathematics Teacher 1 and Mathematics Teacher 2) have understood the concept, developed instruments, implemented, and evaluated diagnostic assessment well, although there are still challenges related to students’ readiness. Meanwhile, one teacher (Mathematics Teacher 3) has not implemented diagnostic assessment formally. The instruments developed include test blueprints and cognitive test items; however, they do not yet fully cover non-cognitive assessment components and comprehensive evaluation instruments
The Perbedaan hasil belajar matematika siswa menggunakan metode pembelajaran blendid learning berbantuan google classroom dan metode pembelajaran langsung pada materi lingkaran di SMA Negeri 3 Manado Khagow, Sisilia Ruth; Pitoy, Cori; Kaunang, Derel Filandy
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2543

Abstract

This study aims to determine the differences in student learning outcomes between those taught using a blended learning method supported by Google Classroom and those taught using a face-to-face method on the topic of circles at Manado State High School 3. This study employs a quantitative approach using a quasi-experimental design and a post-test only control design. The research sample consisted of two classes: Class XI A as the experimental class and Class XI B as the control class. Data collection utilized a post-test to measure learning outcomes. Data were analyzed using normality tests, homogeneity tests, and t-tests. The results indicated that the average learning outcome for students in the experimental class was 80.97, while that for the control class was 75.18. The results of the hypothesis test yielded a calculated t-value of 1.905 and a critical t-value of 1.672 at a significance level of 0.05, so the calculated t-value was greater than the critical t-value. Thus, there was a difference in student learning outcomes, with students taught using blended learning supported by Google Classroom achieving better results than those taught using the direct instruction method.
Co-Authors A. Pesik Anekke Pesik Anetha L.F. Tilaar Angel Madonsa Angelinus Aurolio Pelealu Anna Lucia Rengkung Anneke Pesik Anneke Pesik Aprilita Majesty Lumanauw Arbi Maarial Asniar M. Pangaribuan Ayu Lestari Baule, Vani Damopolii, Matthew Clay Immanuel Deise Tamedia Derel Filandy Kaunang Febriyani R.D. Putri Ferlania Anyelir Katopo Geofani Saul Darius Runtukahu Grifiany Meisy Pongayow Hanna Juwita Sembiring Harmelita Halean I Wayan Damai James U.L. Mangobi John R. Wenas Jorry F Monoarfa Katopo, Ferlania Anyelir Khagow, Sisilia Ruth Kuswadi, Firginia Leonardus Turang Letunggamu, Maria Priskila Mononimbar, Eunike Jeylinda Richilya Nicky Kurnia Tumalun Okpin Manambe Oltje Telly Sambuaga Patandungan, Elisa Berlin Patricia V. J. Runtu Philotheus E. A. Tuerah Prameswari, Chinta Pulukadang, Rosiah Juliati Putri, Febriyani R.D. Rosauli Novalina Samosir Rosiah J. Pulukadang Santje M. Salajang Sinaga, Sara N. Sylvia Jane Annatje Sumarauw Tamedia, Deise Tulangow, Sebastiano Vinsensio Useng, Markus Santo Vadilla mamahit victor Sulangi Wenas, John R.