CARTESIUS : Jurnal Pendidikan Matematika
Jurnal Cartesius merupakan wadah informasi yang berisi artikel ilmiah penelitian, studi literatur, gagasan, aplikasi teori, kajian analisis kritis, dan penelitian lainnya di bidang matematika dan pendidikan matematika. Jurnal Cartesius diterbitkan dua kali dalam satu tahun, Januari-Juni dan Agustus hingga Desember, yang diterbitkan oleh Program Studi Pendidikan Matematika Universitas Katolik Santo Thomas Medan.
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<![CDATA[Pengaruh Pendekatan Matematika Realistik Terhadap Kemampuan Penalaran Matematis Dalam Pembelajaran Matematika ]]>
<![CDATA[Simorangkir, Imelda]]>
<![CDATA[ CARTESIUS : Jurnal Pendidikan Matematika Vol 2 No. 1 Tahun 2019 ]]>
Publisher : <![CDATA[Unika Santo Thomas Medan ]]>
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DOI: 10.54367/cartesius.v2i1.486
<![CDATA[The purpose of this study was to look at the effect of realistic mathematics learning on students 'reasoning abilities and to determine students' responses to mathematics learning with realistic mathematical approaches and their relation to mathematical reasoning abilities. This research was conducted at YPAK Galang of Junior High School at 2017/2018 Academic Year. The method used in this study is a quasi-experimental method with the design of Non Equivalent Control Group Design. The sample in this study was 64 students consisting of 32 students for the experimental group and 32 students for the control group. The data analysis technique used in this study is a regression test. Based on the calculation of hypothesis regression linearity test (i) Ha is accepted and Ho is rejected because F_count < F table is -44.40 < 1.88 then the regression form is linear, and for testing the significance of hypothesis regression (ii) Ha is accepted and Ho is rejected because of Fcount > Ftable that is 44.402 > 3.96 means that there is a relationship of variable (X) to varabel (Y). Data collection techniques in the form of a questionnaire consisting of 14 items statement. Based on the calculation of questionnaire data on students 'responses to realistic mathematical learning, the percentage of students' responses that stated yes was 75.38% and the percentage of responses that stated was not 24.62%. This shows that the student response questionnaire is positive.]]>
<![CDATA[Pengaruh Model Pembelajaran Berbasis Masalah Terhadap Kemampuan Berpikir Kritis Matematis Siswa Kelas VIII SMP ]]>
<![CDATA[Br. Sirait, Dina Meilinda]]>
<![CDATA[ CARTESIUS : Jurnal Pendidikan Matematika Vol 2 No. 1 Tahun 2019 ]]>
Publisher : <![CDATA[Unika Santo Thomas Medan ]]>
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DOI: 10.54367/cartesius.v2i1.488
<![CDATA[This study aims to: (1) To determine the effect of problem-based learning models on mathematics critical thinking skills of junior high school students; (2) To find out the attitudes of students towards the problem-based learning model. The population in this study were eighth grade students of Junior High School of 28 Medan. By random sampling selected class VIII-F as an experimental class as many as 40 students and class VIII-E as a control class as many as 40 students. The data used in this study are quantitative data and qualitative data. Quantitative data are data obtained from tests of students' critical thinking skills and qualitative data, namely data obtained from student attitude questionnaires. Based on the analysis of research data, obtained the following results: (1) the results of regression analysis obtained the equation = 51.89 + 23.57X means that the problem-based learning model has a positive effect with an average value of 75.46 mathematical thinking skills of students . From the results of the correlation it was found that the influence of the problem-based learning model was strong enough with the results of the correlation coefficient of 0.568 and the coefficient of determination of 32.3% so it can be concluded that the problem-based learning model influences students' critical thinking skills. (2) Based on student attitudinal response results it can be concluded that the student response is very positive towards the problembased learning model with an average of ≥ 86.03.]]>
<![CDATA[Upaya Meningkatkan Kemampuan Pemahaman Matematika Siswa Dengan Model Pembelajaran Kooperatif Tipe Think Pair Share Materi Bentuk Aljabar ]]>
<![CDATA[Br. Tarigan, Elsa]]>
<![CDATA[ CARTESIUS : Jurnal Pendidikan Matematika Vol 2 No. 1 Tahun 2019 ]]>
Publisher : <![CDATA[Unika Santo Thomas Medan ]]>
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DOI: 10.54367/cartesius.v2i1.482
<![CDATA[The purpose of this study was to: (1) determine the level of mathematical comprehension ability of class VII students of Pancur Batu 2 Middle School before and after using the Think-Pair-Share type cooperative learning model, (2) identify the application of Think-Pair-Share type cooperative learning models in an effort to improve students' mathematical understanding skills in algebraic form operating material. This type of research is Classroom Action Research. The subjects of this study were all students of class VII-2 of Pancur Batu 2 of Junior High School. Time for implementation of semester 1 of the Academic Year 2017/2018. Data collection techniques include test and non-test techniques. The study was conducted in two cycles. The level of mathematics comprehension ability of students in the first cycle was 56.67% while the second cycle was 76.67%. The results of this study indicate an increase in students' mathematical understanding skills from cycle I to cycle II which is equal to 20%. Increased teacher activity can be seen from the average percentage of teacher activity in the first cycle is 57.14%, increasing in the second cycle to 77.14%. Increased student activity can be seen from the average percentage of student activity in the first cycle is 61.42%, increasing in the second cycle to 85.71%. Based on the results obtained from this study, it was concluded that the cooperative learning model of the Think-Pair-Share type could improve students' mathematical comprehension skills in class VII of Pancur Batu 2 of Junior High School.]]>
<![CDATA[Pengaruh Model Pembelajaran Kooperatif Tipe Team Assisted Individualization (TAI) Terhadap Kemampuan Komunikasi Matematis Siswa SMP ]]>
<![CDATA[Silalahi, Nila Mona]]>
<![CDATA[ CARTESIUS : Jurnal Pendidikan Matematika Vol 2 No. 1 Tahun 2019 ]]>
Publisher : <![CDATA[Unika Santo Thomas Medan ]]>
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DOI: 10.54367/cartesius.v2i1.483
<![CDATA[The purpose of this study was to (1) determine the effect of the cooperative learning model type Team Assisted Individualization (TAI) on students' mathematical communication skills; (2) find out whether the mathematical communication skills of students with the cooperative learning model Team Assisted Individualization (TAI) type are higher than the mathematical communication skills of students with conventional learning. This type of research is experimental research using the pretest-posttest control group research design. The study population was all seventh grade students of Pancur Batu 2 Junior High School consisting of eight classes. The research sample was selected using simple random sampling technique, so that class VII3 was obtained as the experimental class and class VII-5 as the control class with each number of students as many as 32 students. The data used in this study are quantitative data. Based on the analysis of research data, the following results were obtained: (1) the results of analysis and regression obtained that the influence of cooperative learning type TAI (Team Assisted Individualization) had a positive effect with a correlation coefficient of 0.741 and a determination coefficient of 54.8%; (2) the results of the t-test analysis with the value of t count = 5.643 and t table = 1.669 which means t count> t table, then the hypothesis Ho is rejected. So that it can be concluded that the mathematical communication skills of students taught by cooperative learning model type TAI (Team Assisted Individualization) are higher than the mathematical communication skills of students who are taught by conventional learning.]]>
<![CDATA[Pengaruh Pembelajaran Matematika Realistik Terhadap Kemampuan Komunikasi Matematis Siswa Kelas VII SMP ]]>
<![CDATA[Sihotang, Ida Wati]]>
<![CDATA[ CARTESIUS : Jurnal Pendidikan Matematika Vol 2 No. 1 Tahun 2019 ]]>
Publisher : <![CDATA[Unika Santo Thomas Medan ]]>
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DOI: 10.54367/cartesius.v2i1.484
<![CDATA[This study aims: (1) To find out whether the Realistic Mathematics Learning approach influences students' mathematical communication skills. (2) To find out whether the increase in students' mathematical communication skills with the Realistic Mathematics Learning approach is higher than conventional learning. This type of research is experimental research using pretest-posttest control group design. The study population was all VII grade students of YPAK Galang SPM consisting of three classes. The research sample was selected using simple random sampling technique, so that the VII-A class as the experimental class and VII-C class as the control class were obtained with 37 students each. The data used in this study are quantitative data. Based on the analysis of the research data, the following results are obtained: (1) the results of the regression analysis obtained by the equation (Y) Ì‚ = 36,945 + 1,003X. And from the results of the correlation obtained that Realistic Mathematics Learning has a positive effect with a correlation coefficient of 0.944 and a coefficient of determination of 89.1%. So it can be concluded that Realistic Mathematics Learning influences students' mathematical communication skills. ; (2) the results of the t-test analysis with the value of t count = 4.489 and t table = 1.666 which means t count> t table, then the hypothesis Ho is rejected. So it can be concluded that the mathematical communication skills of students taught by Realistic Mathematics Learning are higher than the mathematical communication skills of students who are taught by conventional learning.]]>
<![CDATA[Pengaruh Model Pembelajaran Kooperatif Tipe Student Teams Achievement Division (STAD) Terhadap Kemampuan Pemahaman Konsep Matematis Siswa Kelas VIII SMP ]]>
<![CDATA[Marbun, Four Marito]]>
<![CDATA[ CARTESIUS : Jurnal Pendidikan Matematika Vol 2 No. 1 Tahun 2019 ]]>
Publisher : <![CDATA[Unika Santo Thomas Medan ]]>
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DOI: 10.54367/cartesius.v2i1.485
<![CDATA[The purpose of this study was to determine the effect of the cooperative Student Teams Achievement Devision (STAD) learning model on the ability to understand students 'mathematical concepts and students' responses to the STAD cooperative learning model type. This research method is a quasi experimental method. This research was conducted in State 2 Junior High School of Sorkam at the even semester of the 2016/2017 Academic Year. The sample of this study was class VIIIA as the experimental class and VIIIB as the control class. From the research data obtained a regression equation Y = 74,857 + 8.857X (there is a positive effect). The average value of students' understanding of mathematical concepts learned by the STAD cooperative learning model is 83,714, while the conventional learning model is 74,857. The coefficient of determination is 21.6%, meaning that 21.6% of the influence of the STAD type cooperative learning model on the ability to understand students' mathematical concepts. The results of the analysis of student responses were obtained (1) by 98.2% stating they were interested and the rest not; (2) amounting to 95.05% stating that there are benefits obtained and the rest not; (3) amounting to 86.78% stated that there were no obstacles experienced during the learning process and the rest stated there were; (4) 94.04% hoped the STAD type cooperative learning model was used in the learning process and the rest did not expect. So, it can be concluded that the student response is very positive because the average percentage of student approval responses to the STAD type cooperative learning model is ≥ 85%.]]>
