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PENGEMBANGAN PERANGKAT PEMBELAJARAN MATEMATIKA DENGAN PENDEKATAN KONTEKSTUAL SETTING KOOPERATIF TIPE TWO STAY TWO STRAY SUB POKOK BAHASAN PERSEGI PANJANG DAN PERSEGI KELAS VII SMP Fawaid, Ahmad RifÃ¢Â€Â™an; Trapsilasiwi, Dinawati; Sri Lestari, Nurcholif Diah
KadikmA Vol 4, No 2: Agustus 2013
Publisher : KadikmA

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Abstract. The research purpose is to know the process and result of development of mathematics learning instruments based on contextual teaching and learning by setting of cooperative learning two stay two stray for rectangle and square topic at seventh grade of junior high school. Learning instruments development model refers to 4D Thiagarajan models which has 4 steps namely define, design, develop, and disseminate. This research has three products namely lesson plan, worksheet, and evaluation test. Based on validation process and tryout, it can be concluded that the learning instruments had fullfiled with validity, practice, and effective criteria. Key Words : 4D Thiagarajan models, contextual teaching and learning, cooperative learning two stay two stray, rectangle and square

PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TEKNIK CHANGE OF PAIRSUNTUK MENGATASI KESALAHAN SISWA MENYELESAIKAN SOAL-SOAL SUB POKOK BAHASAN LUAS TRAPESIUM KELAS VII A SMP NEGERI 7 JEMBER TAHUN AJARAN 2012/2013 MS, Mega Nirmalasari; Susanto, S; Sri Lestari, Nurcholif Diah
KadikmA Vol 4, No 2: Agustus 2013
Publisher : KadikmA

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Abstract.Cooperative learning by using change of pairs technique is a learning model which gives chancefor thestudentstoask andstrengthentheir answerfor the exercises.This research implementscooperative learning by using change of pairs technique to reduce studentâs errorin solving problems of area of trapezoid. The subject of the research is grade VII A students of SMP Negeri 7 Jember. The type of this research is a Classroom Action Research (CAR). The data collection methods used in this research are observation, documentation, interview, and test. The result shows that the errors are decreasing; misused data decrease from 50% to 0%; distorted theorem or definition decrease from 59,38% to 12,5%; technical errors decrease from 61,25% to 9,34%; and other error decrease from 27,5% to 1,25%. The result also shows that the activity of the students and the teacher in teaching and learning process are increasing. KeyWords:changeofpairs technique, students error, area of trapezoid

ANALISIS MODEL MATEMATIKA PERTUKARAN PANAS PADA FLUIDA DI HEAT EXCHANGER TIPE SHELL AND TUBE YANG DIGUNAKAN DI PT. PUPUK KALTIM TBK. Qoriatul, Q; Fatahillah, Arif; Dafik, D; Sri Lestari, Nurcholif Diah
KadikmA Vol 4, No 1 (2013): April 2013
Publisher : KadikmA

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Abstract. Materials to produce fertilizer are NH3 Liquid and CO2 gas. Required CO2 gas should be free from condensation, so CO2 gas is refrigerated in intercooler. In this research, we analyse of mathematic model for heat transfer in fluid with finite volume method. We will review how the CO2 gas cooling process from mathematics model point of view. We will model the equations for CO2 gas cooling process which includes momentum dan energy. After that this model will be discretizatied. For numerical solution, we will use Matlab and Fluent to simulate CO2 gas cooling process. The simulation result using Matlab and Fluent forms will be presented descriptively in charts, tables, and images to show how the distribution process of heat transfer. The result show for error is 0,0087. In conclusion the model accurate for solving heat transfer process in CO2 gas. Key Words : Mathematics Models, Heat transfer, Finite Volume Methode,

ANALISIS LEVEL PERTANYAAN GEOMETRI BERDASARKAN TINGKATAN VAN HIELE PADA BUKU TEKS MATEMATIKA SMP KELAS VII Ramadhani, Ema Sintia; Sunardi, S; Sri Lestari, Nurcholif Diah
KadikmA Vol 4, No 1 (2013): April 2013
Publisher : KadikmA

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Abstrac.: This research aims to determine the percentage of geometry questions for each van Hiele levels in the SMP mathematics textbook for seventh grade, and to determine the percentage of geometry questions for each descriptors in the SMP mathematics textbook for seventh grade based on van Hiele levels. Sources of data in the study include documents geometry questions in the SMP mathematics textbook for seventh grade, written by Tatag Yuli Eko Siswono and Netti Lastiningsih; and also Atik Wintarti et.al. To analyze the data used descriptive analysis with a qualitative approach. The result of the data analysis shows that are 1176 questions in the mathematics textbooks SMP written by Tatag Yuli Eko Siswono and Netti Lastiningsih; and also written by Atik Wintarti et.al. From the results, the percentage of geometry questions for each van Hiele levels in the mathematics textbook written by Tatag Yuli Eko Siswono and Netti Lastiningsih for Visualization, Analysis, Ordering, and Deduction are respectively 9%, 81.31%, 8.47%, and 0%. Then, in the SMP mathematics textbook written by Atik Wintarti et.al, there are 14,88% in the visualization level; 75,42% in the analysis level; 8,36% in the ordering level; and 0% in the deduction level. However, each SMP mathematics textbook for seventh grade are equally dominated by Analysis level. Then, the geometry questions in the mathematics textbook written by Tatag Yuli Eko Siswono and Netti Lastiningsih is dominated by descriptor 4.b and descriptor 9. But, in the SMP mathematics textbook written by Atik Wintarti et.al is dominated by descriptor 2. Key Words : textbook, geometry questions, van Hiele geometric thinking levels

SOAL MATEMATIKA DALAM PISA KAITANNYA DENGAN LITERASI MATEMATIKA DAN KEMAMPUAN BERPIKIR TINGKAT TINGGI Setiawan, Harianto; Dafik, Dafik; Sri Lestari, Nurcholif Diah
Prosiding Seminar Matematika dan Pendidikan Matematik Vol 1, No 1 (2014): Prosiding Seminar Nasional Matematika 2014
Publisher : Prosiding Seminar Matematika dan Pendidikan Matematik

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PISA (Programme for International Student Assessment) adalah studi international menguji prestasi literasi membaca, matematika, dan sains siswa sekolah berusia antara 15tahunyang mendekati akhir wajib belajar. Dalam studinya, PISA menggunakan pendekatan literasi yang inovatif, suatu konsep belajar yang berkaitan dengan kapasitas para siswa untuk menerapkan pengetahuan dan keterampilan dalam mata pelajaran kunci disertai dengan kemampuan untuk menelaah, memberi alasan dan mengomunikasikannya secara efektif, serta memecahkan dan menginterpretasikan permasalahan dalam berbagai situasi. Seorang siswa dikatakan mampu menyelesaikan masalah apabila ia dapat menerapkan pengetahuan yang telah diperoleh sebelumnya ke dalam situasi baru yang belum dikenal. Kemampuan inilah yang biasa kita kenal sebagai keterampilan berpikir tingkat tinggi. Maka dari itu, dalam penelitian ini akan memaparkan secara jelas keterkaitan soal-soal matematika model PISA dengan kemampuan literasi matematika siswa serta keterampilan berpikir tingkat tinggi siswa.

SOAL MATEMATIKA DALAM PISA KAITANNYA DENGAN LITERASI MATEMATIKA DAN KEMAMPUAN BERPIKIR TINGKAT TINGGI Setiawan, Harianto; Dafik, Dafik; Sri Lestari, Nurcholif Diah
Prosiding Seminar Matematika dan Pendidikan Matematik Vol 1 No 2 (2014): Prosiding Seminar Nasional Matematika 2014
Publisher : Prosiding Seminar Matematika dan Pendidikan Matematik

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PISA (Programme for International Student Assessment) adalah studi international menguji prestasi literasi membaca, matematika, dan sains siswa sekolah berusia antara 15tahunyang mendekati akhir wajib belajar. Dalam studinya, PISA menggunakan pendekatan literasi yang inovatif, suatu konsep belajar yang berkaitan dengan kapasitas para siswa untuk menerapkan pengetahuan dan keterampilan dalam mata pelajaran kunci disertai dengan kemampuan untuk menelaah, memberi alasan dan mengomunikasikannya secara efektif, serta memecahkan dan menginterpretasikan permasalahan dalam berbagai situasi. Seorang siswa dikatakan mampu menyelesaikan masalah apabila ia dapat menerapkan pengetahuan yang telah diperoleh sebelumnya ke dalam situasi baru yang belum dikenal. Kemampuan inilah yang biasa kita kenal sebagai keterampilan berpikir tingkat tinggi. Maka dari itu, dalam penelitian ini akan memaparkan secara jelas keterkaitan soal-soal matematika model PISA dengan kemampuan literasi matematika siswa serta keterampilan berpikir tingkat tinggi siswa.

Exploring the Decision-Making Process of Pre-Service Teachers in Solving Mathematics Literacy Problems Wasilatul Murtafiah; Marheny Lukitasari; Nurcholif Diah Sri Lestari
Jurnal Pendidikan Matematika Vol 15, No 2 (2021)
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jpm.15.2.13908.145-160

Students’ lack of mathematical literacy skills is also accompanied by the lack of mathematical literacy skills of most pre-service teachers. The purpose of this study is to investigate the decision-making process conducted by pre-service teachers in solving mathematical literacy problems. This qualitative descriptive study involved two subjects taken from 42 pre-service mathematics teacher students. Each subject was identified based on their pattern in solving mathematical literacy problems correctly and inappropriately. Data were collected through tests of mathematical literacy problems and test-based interviews. The results showed that there were differences in the decision-making process done by the students with correct and incorrect problem solving, namely: (1) building ideas, having three vs. two solution ideas, formulating and employing correctly vs. formulating correctly and employing inappropriately; (2) clarifying ideas, giving reasons for each idea vs. having wrong reasons due to calculation errors, interpreting correctly vs. interpreting incorrectly; and (3) assessing the reasonableness of an idea, providing logical reasons with one choice vs. logical reasons with one choice but less sure. Based on the findings, it can be concluded that the creativity of prospective teacher students in building ideas is still low and reasoning in expressing and choosing ideas is still weak, causing immature decision making. The finding of this study provides suggestions for educators to provide structured assignments and for other researchers to find factors influencing pre-service teachers’ decision-making in mathematics problem-solving to improve pre-service teachers’ decision-making skills.

ANALISIS KEMAMPUAN BERPIKIR KRITIS SISWA SMP DALAM MEMECAHKAN MASALAH MATEMATIKA MATERI BENTUK ALJABAR DITINJAU DARI GAYA KOGNITIF REFLEKTIF DAN IMPULSIF Guvinta Rahayu; Dian Kurniati; Dhanar Dwi Hary Jatmiko; Nurcholif Diah Sri Lestari; Reza Ambarwati
Jurnal Edukasi dan Sains Matematika (JES-MAT) Vol 8, No 2 (2022): Jurnal Edukasi dan Sains Matematika (JES-MAT)
Publisher : Department of Mathematics Education, Universitas Kuningan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25134/jes-mat.v8i2.6372

Students' critical thinking skills in learning are very important to have in the 2013 curriculum. The purpose of the study was to describe the critical thinking skills of students in SMP Negeri 7 Jember class VII J in solving mathematical problems in algebraic material, in terms of reflective and impulsive cognitive styles. This research is a descriptive study that uses a qualitative approach with 4 research subjects from class VII J consisting of 2 reflective subjects and 2 impulsive subjects. Data collection techniques used are tests and interviews. Data analysis techniques were carried out by reducing data, presenting data and drawing conclusions. Technique of data validity using triangulation method. The results of the research that have been carried out are that reflective subjects are able to meet all of the FRISCO critical thinking indicators (Focus, Reason, Inference, Situation, Clarity and Overview) in solving critical thinking test questions tend to be thorough, take a long time and the answer is correct. Impulsive subjects were only able to fulfill some of all the FRISCO critical thinking indicators (Focus, Reason, Inference, Situation, Clarity and Overview), namely focus and situation. Impulsive subjects cannot solve critical thinking questions because they do not understand how to solve problems.

PENGEMBANGAN PERANGKAT PEMBELAJARAN BARISAN DAN DERET MENGGUNAKAN METODE OUTDOOR LEARNING UNTUK MENINGKATKAN KEMAMPUAN KOMUNIKASI MATEMATIS SISWA Theresia Siska Rikna Sari; Didik Sugeng Pambudi; Nurcholif Diah Sri Lestari
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 11, No 4 (2022)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Mathematical communication skills are important for students to have, but these abilities are still low. One reason is that the teacher's teaching method is still dominated by lectures in the classroom. This study aims to improve students' mathematical communication skills through the development of learning tools using the outdoor learning method on sequences and series material. Validation sheets, observation sheets, student response questionnaires and learning achievement tests are the data collected for analysis. The results of the validity of lesson plans, worksheets, and THB each reached a value of 4.6; 4.7; and 4.6 out of a maximum value of 5, which means it is valid. The results of the practicality analysis of the device reach 92%, which means it is practical. From the trial results, there were 80% of students in the active category, and positive student responses reached 84%. The minimum completeness of the learning outcomes test was obtained by 85.29% of the students in the experimental class, while the control class only reached 52.94%. From the results of the t-test it is evident that learning on sequences and series material with learning devices using outdoor learning methods has a significant effect on improving students' mathematical communication skills. Keywords: Mathematical Communication, Sequences and Sequences Material, Outdoor Learning Methods, Learning Devices.

ADULT MATHEMATICAL LITERACY SISWA BERDASARKAN AKTIVITAS LITERASI MATEMATIS Nurcholif Diah Sri Lestari; Wasilatul Murtafiah; Marheny Lukita Sari; Fitri Annisa; Maharani Hayuning P. P
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 11, No 4 (2022)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Adult mathematical literacy of high school students rarely gets attention, even though they need this skill to face various life challenges and situations. This research aims to describe the adult mathematical literacy based on activities of mathematical literacy’s processes domain when solving problems. Therefore, three high school students with equivalent mathematical abilities in specialization mathematics and compulsory mathematics are selected as research subjects. Data collection are through tests and interviews. The Data reduced, triangulated using the triangulation method, presented, and used in concluding. The results indicate that high school students with high mathematical abilities can use the ability to formulate situations mathematically, using concept facts, procedures, and mathematical reasoning; and interpret mathematical solutions. However, in formulating the situation, they tend only to identify aspects or components whose value is known by using familiar symbols. They also tend to make mistakes in making mathematical reasoning, especially if the problem involves reasoning with many criteria and conditions, as well as errors in interpreting solutions that contain limitations or constraints. The results suggested to familiarize students with everyday problems that involve reasoning to help students recognize problem situations as mathematical situations and generate creativity in using mathematical knowledge

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