Indonesia Conference Directory

Corresponding Author
Yanti Yulianti

Institutions
IKIP Siliwangi Bandung

Abstract
This research is a Classroom Action Research (CAR) which is conducted in three cycles, each cycle is held 2 x meetings, and each cycle is carried out 5 x 40 minutes. The purpose of this study was to improve mathematical reasoning abilities and learning activities of class VII students of Tarogong Kidul 3 Junior High School on Quadrangle and Triangle material through efforts to improve actions taken from cycle to cycle. The subjects in this study were seventh-grade students of Tarogong Kidul Junior High School 3 in even semester of the school year 2018 - 2019 which numbered 32 people. Data collection techniques in classroom action research are observations of students mathematics learning activities, the value of learning outcomes, obtained from the students final tests conducted at the end of each cycle, interviews, and documentation. The data in this study used mathematical reasoning tests for each cycle and were analyzed using qualitative. For analysis used descriptive statistics to describe mathematical communication skills in solving mathematical communication problems after learning, and the percentage of mastery learning obtained by students in each cycle. Data from observations of student mathematics learning activities and interviews were analyzed qualitatively. The results of this study reveal that mathematical reasoning abilities and learning activities of class VII students of Tarogong Kidul Junior High School 3 in Quadrangle and Triangle material have increased from cycle to cycle through efforts to improve actions taken.

Keywords
Mathematical Reasoning Ability, Student Learning Activity, Quadrangle and Triangle

Topic
Mathematics Education

Link: https://ifory.id/abstract/zm3746H2NrBy

Corresponding Author
Mellyana Mellyana

Institutions
IKIP Siliwangi Bandung

Abstract
This research is a Classroom Action Research (CAR) which is carried out with three cycles, each cycle is held 2 x meetings, and each cycle is carried out 4 x 45 minutes. The purpose of this study was to improve mathematical problem solving and learning activities of Social Sciences class X students of SMA 8 Garut on Trigonometry material through efforts to improve actions taken from cycle to cycle. The subjects in this study were students of class X IPS in SMA 8 Garut even semester of the school year 2018 - 2019 which numbered 32 people. Data collection techniques in classroom action research are observations of students mathematics learning activities, the value of learning outcomes, obtained from the students final tests conducted at the end of each cycle, interviews, and documentation. The data in this study used a mathematical problem-solving test for each cycle and analyzed using qualitative. Descriptive statistics are used for analysis to describe mathematical communication skills in solving mathematical problem-solving questions after learning, and the percentage of mastery learning obtained by students in each cycle. Data from observations of student mathematics learning activities and interviews were analyzed qualitatively. The results of this study reveal that mathematical problem solving and learning activities of Social Sciences class X students of SMA 8 Garut in Trigonometry material have increased from cycle to cycle through efforts to improve the actions taken.

Keywords
Mathematical Problem Solving Ability, Student Learning Activities, Trigonometry.

Topic
Mathematics Education

Link: https://ifory.id/abstract/V4qTUdZYP8QJ

Corresponding Author
Siti Khoiruli Ummah

Institutions
University of Muhammadiyah Malang

Abstract
Abstract— Blended Learning using Canvas became familiar method in 2019 because of the easiest access and the centralized system management in university. This paper aimed to describe the findings of case study focusing on the engineering students- participation and the creativity in implementation of flipped classroom method emphasizing group discussion and students- answer sheets. The findings were optimally reached from online group discussion, paper-based test, and online test using qualitative approach. The findings were surprised because the engineering students through flipped classroom were more active than in the classroom. There were more comment in group discussion and the answer from discussions- topic were vary. The discussion was more interactive because every students has different questions that must be answered by other students. The engineering graduated students could answered fluently and vary. The students- answer on paper-based test and online test were vary and all the questions was answered correctly. It could be said that flipped classroom optimally implemented so that change the students- participation and creativity significantly.

Keywords
Blended learning; Canvas; engineering students; flipped classroom; online group discussion; students- participations; creativity; mathematics engineering

Topic
Mathematics Education

Link: https://ifory.id/abstract/k3mAxzCa6GEr

Corresponding Author
CUT LATIFAH ZAHARI

Institutions
Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Visuospatial reasoning is a process of thinking about geometric objects that many people use to solve problems encountered in everyday life. Visuospatial reasoning not only deals with an essential role in the world of mathematics, but also can solve problems in the fields of engineering, architecture, medicine, physics, and other areas. This study aims to describe and compare the increase in visuospatial reasoning through a hybrid learning model. The hybrid learning model in this research is the process of acquisition of knowledge and skills (student-centered) based on instructional design that integrates digital (internet and mobile), printed, recorded and traditional face-to-face classroom activities that are organized in the teaching plan. Furthermore, the students are guided to decide their learning process by choosing the available learning methods and materials that best suit their characteristics and individual needs that are oriented towards achieving the objectives of the lecture. Based on data analysis, it was found that visuospatial reasoning improved better in students of moderate mathematical abilities group but did not increase the low group.

Keywords
Visuospatial Reasoning, Hybrid Learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/JvWGFk6TwnrQ

Corresponding Author
Nunuy Nurkaeti

Institutions
1Program Studi Pendidikan Guru Sekolah Dasar, Fakultas Ilmu Pendidikan, Universitas Bhayangkara Jakarta Raya, Jl. Perjuangan No.81, Bekasi 17121, Indonesia
2Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
This study aims to describe enhancement of mathematical creative thinking abilities in fifth grade elementary school student through open-ended approach based on metacognitive, open-ended, and direct instruction. The method of this study is quasi experiment with pretest posttest design. Enhancement of mathematical creative thinking ability students that learning with open-ended approach based on metacognitive better than students that learning with open-ended and direct instruction. It is because, in the open-ended approach based on metacognitive students encourage to think divergent. So they could find various alternative solution to solve the problem. In the other hand, using metacognitive strategy in the open-ended approach could make student to think conscious and deeply about how to solve the problem. Therefore students could know their known and made meaningful learning.

Keywords
creative thinking, open-ended approach, open-ended based on metacognitive

Topic
Mathematics Education

Link: https://ifory.id/abstract/eZyhWACpLK8w

Corresponding Author
Bety Miliyawati

Institutions
a) Universitas Subang
Jl. RA. Kartini KM. 03, Subang, Indonesia
*betymiliyawati[at]gmail.com

b) Universitas Pendidikan Indonesia
Jl. Setiabudi, Bandung, Indonesia

Abstract
This study aims to describe the enhancement of students mathematical literacy ability using the Problem Based Learning (PBL) model with Didactical Engineering (DE). The method used is quasi-experimental, with a pre-test post-test control group design research design. The population was all eighth grade students of state junior high schools in Subang regency and the sample involved as many as 105 students spread across two classes, namely the experimental class and the control class. The instruments used were tests of Prior Mathematical Ability (PMA) and mathematical literacy ability test. Research data for pretest, posttest, and normalized gain of students with mathematical literacy ability were analyzed quantitatively using t test, one way ANOVA, and two way ANOVA. Based on the results of data analysis, it can be concluded that there is a significant difference in the enhance in students mathematical literacy ability in terms of the PMA category and learning model, based on further tests of the most influential low and high PMA categories. Overall there are differences to enhancement in students mathematical literacy abilities between students who get PBL models with DE compared conventional models, and there is no interaction between learning models and PMA categories on mathematical literacy abilities.

Keywords
Problem Based Learning; Didactical Engineering; Mathematical Literacy

Topic
Mathematics Education

Link: https://ifory.id/abstract/aAxuGf6jWhPY

Corresponding Author
Muhammad Rizki Fauzi

Institutions
Department of Mathematics Education, Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia.
*mrizkif[at]upi.edu

Abstract
This study aims to investigate and analyze the enhancement of student-s mathematical abstraction, connection ability and persistence who taught by generative learning model. It employed quasi-experimental method with non-random pre-test and post-test control design. More specifically, it used the 2x3 factorial design, namely the learning factors that included Generative Learning Model and conventional teaching learning, and levels of prior mathematical ability (high, middle, and low). This study took a sample of 68 grade X (ten) students of a senior high school in Karawang, West Java. The instruments of this study consisted of mathematical abstraction test, mathematical connection test and mathematical persistence questionnaire. Quantitative data analysis were carried out by using t-test, Mann-Whitney U test, and two ways ANOVA with interaction. The results of this study show that: 1) student-s achievement and enhancement of mathematical abstraction and connection abilities who taught by Generative Learning Model were significantly higher than those of students who received conventional learning; 2) there is no interaction between learning models and prior mathematical ability toward the enhancements of mathematical abstraction and connection ability 3) Mathematical persistence of students taught by Generative Learning Model was also significantly higher than of those taught with conventional learning.

Keywords
Mathematical Abstraction, Mathematical Connection, Mathematical Persistence, Generative Learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/H8gJR4p7Vtjk

Corresponding Author
Mike Handayani

Institutions
1) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr Setia Budhi No. 229, Bandung 40154, Indonesia
2) Departemen Pendidikan Matematika, IAIN Batusangkar, Jl. Jendral Sudirman No. 137, Limo Kaum, Kabupaten Tanah Datar, Sumatera Barat, 27217, Indonesia
2) Departemen Pendidikan Matematika, IAIN Batusangkar, Jl. Jendral Sudirman No. 137, Limo Kaum, Kabupaten Tanah Datar, Sumatera Barat, 27217, Indonesia
2) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia

Abstract
This study aims to look at improvements and investigate the difference between students- mathematics problem solving ability using Active Learning Strategy Type Learning Starts With a Question (LSQ) and using direct learning. This research was a quasi experiment by randomized pretest-posttest control group design to 48 students of junior high school in Sumatra Barat in the even semester of 2017. Methods of data collection in this study observation, documentation and test. N-Gain and T test was used to analyzed the data. Results showed that there was an increase in students mathematics problem solving abilitiy with high categories and mathematics problem solving ability of students using LSQ strategy were better than students mathematics problem solving ability using direct learning.

Keywords
Problem Solving Ability; Active Learning Strategy Type Learning Starts With a Question

Topic
Mathematics Education

Link: https://ifory.id/abstract/NwufHKy6rGjv

Corresponding Author
Cita Dwi Rosita

Institutions
(1) Departement of Mathematics Education, Universitas Swadaya Gunung Djati
(2) Departement of Mathematics Education, Universitas Pendidikan Indonesia

Abstract
This experiment investigated the impact of reading and writing learning strategies on mathematics preservice teachers critical thinking dispositions. The sample in this study were 80 students in the mathematics education program who were purposively selected from 120 total populations reviewed based on: (1) students prior mathematical abilities; (2) learning model group. In this study also analyzed the interaction between the students prior mathematical abilities and learning strategies towards enhancing students mathematical critical thinking dispositions. The results showed that: (1) the average enhance in critical thinking dispositions of students who received a reading and writing learning strategy was better than those who received conventional learning as a whole; (2) there are differences in the average enhance in mathematical critical thinking dispositions between students who get reading and writing learning strategies and students who get conventional learning are reviewed based on their prior mathematical ability groups; (3) there is no interaction between learning and students prior mathematical abilities towards increasing students mathematical critical thinking dispositions.

Keywords
mathematical critical thinking disposition; reading and writing learning strategy

Topic
Mathematics Education

Link: https://ifory.id/abstract/cwxPVRrefjgb

Corresponding Author
Citra Megiana Pertiwi

Institutions
Faculty of mathematics and science education, IKIP Siliwangi
Jalan Terusan Jenderal Sudirman, Cimahi, Jawa Barat, Indonesia

Abstract
This research aimed to analyze the role of Realistic Mathematics Education (RME) approach with GeoGebra in enhancement, achievement, and phenomena of Mathematical Inductive Reasoning Ability (MIRA) and Mathematical Self-Confidence (MSC) of Junior High School students-, and due to no research on the dependent variable and independent variable together yet. The method used was experimental research with a pretest-posttest Control Group Design. In this research, the population was all 7th graders in Cimahi City. The research sample was 69 students consisted of two classes that were randomly selected and divided into experimental and control classes in a school. The instrument used an essay test on MIRA and MSC scale. The results showed that: (1) Significant enhancement and achievement of MIRA and MSC for students who learned through RME with GeoGebra were better than the Ordinary Learning, (2) Students- achievement of MIRA through RME with GeoGebra was at a strong level and for students with ordinary learning was at a sufficient level, (3) Students- achievement of MSC through RME with GeoGebra and students- with ordinary learning were at a good level, (4) Students- MIRA on the indicator explained that the model had not been achieved ideally.

Keywords
Reasoning; Self-Confidence; Realistic; GeoGebra

Topic
Mathematics Education

Link: https://ifory.id/abstract/pC4HAENPGTbk

Corresponding Author
Vara Nina Yulian

Institutions
a) Study Program of Mathematics Education, School of Postgraduate Studies, Universitas Pendidikan Indonesia,
Jl. Dr. Setiabudhi 229, Bandung, Indonesia.
*varanina15[at]student.upi.edu
b) Study Program of Mathematics Education, Universitas Subang, Jl. RA Kartini Km 3 Subang, Subang, Indonesia.

Abstract
Students mathematical connection is one of ability that students must have. However, one of the reasons that students mathematical connection is still poor is the lack of enthusiasm of students while learning mathematics, and learning that does not give flexibility to students to empower the brain. Therefore, it is necessary to have an alternative learning that can develop students mathematical connection. This study used a quasi-experimental method. The subject in this research was 49 students from 3 classes in one of junior high schools, in Subang, West Java, selected by applying purposive sampling technique. The instruments used were mathematical connection test and attitude scale. Based on the results it was concluded that that there is a significant difference between enhancing students mathematical connection who are learning by brain-based learning model with students who learn by expository learning model.

Keywords
mathematical connection, brain-based learning.

Topic
Mathematics Education

Link: https://ifory.id/abstract/VWGx2wkF3ndL

Corresponding Author
ADITYA PRIHANDHIKA

Institutions
a) Departemen Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*adityaprihandhika[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung 40154, Indonesia

Abstract
This study aims to identify the learning obstacle of students on the basic concept of derivatives. The research used descriptive qualitative. Data of the research was obtained from the results of tests and interviews given to six participants as the pre-service mathematics teachers from two different institutions in West Java. The test is given consists of seven questions related to basic concept of the derivative. Then the answers to the questions were confirmed again by clinical interviews. These data are then analyzed by the framework of APOS theory (Action-Process-Object-Schema) with the aim to overview the thinking of processes who experienced by participants in answering the questions given. The results of the study show that there is still some learning obstacles experienced by partisipants in understanding the basic concepts of derivatives. Constraints experienced include the lack of mathematical connection skills regarding the basic concept of derivatives, the operation of a function that is still wrong, and the lack of a meaningful process for the concepts learned so that problem-solving processes are still limited to procedural problems. Based on this research, it is recommended that pre-service mathematics teachers can internalize derivative concepts learned so that the knowledge scheme formed can be better.

Keywords
Epistemological Obstacle; Concept of Derivatives; Thinking of Process; APOS Theory; Clinical Interview

Topic
Mathematics Education

Link: https://ifory.id/abstract/bnejqArXvdLy

Corresponding Author
Annisa Nur Hasanah

Institutions
a) Magister Pendidikan Matematika,Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
*annisanurhasanah[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract
This research was descriptive qualitative research. This study aims to analyze the errors of students in the problems of surface area and volume on the prism and pyramid then to expose causal factors. The subject of this research was 29 students 9th of SMP Negeri 40 Bandung, that was chosen by purposive sampling technique. Data was collected from students through validated essay tests and interviews. The data was analyzed by descriptive method. The results show that some of students (1) did not understand the problems, (2) cannot represent the prism and pyramid in other form, (3) did some error in using formula of surface area and volume of prism and pyramid, (4) did some error in calculations and (5) did misconceptions. The causal factors were students did not accustomed to identify and write what known and asked when solve a mathematical problem, difficulty in reading information, did not understand concept of the prism and pyramid, carelessness in calculation, haste in answering questions, and lack of effort.

Keywords
Error Analysis; Prism and Pyramid Problems; Misconceptions

Topic
Mathematics Education

Link: https://ifory.id/abstract/QD9AKzPGRe4h

Corresponding Author
Yunia Bani Pratiwi

Institutions
a) Program Studi Pendidikan Matematika, Sekolah Pascasarjana Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*yuniabanipratiwi[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
This research aims to analyze students‘ answer on solving rational and irrational inequalities. A qualitative method was used in this research. Data were collected from 42 students of 10th grade through the test consisted of 10 problems. For further identification, an interview was also conducted. The result showed that there were two groups of students‘ solution. The first one are students who used number line and the other one are students who solve directly without number line. In this article explained that there are six categories of student errors i.e. solving rational inequality like the equation, looking for zero maker in numerators and denominators of rational inequality with the inequalities following the question, errors arose from problems with factorisation, wrong in applying the property of distribution, ignoring irrational inequality rules, and misinterpreting the sign of inequality into a number line.

Keywords
Student-s answers; Errors; Number Line; High School Students; Rational and Irrational Inequalities

Topic
Mathematics Education

Link: https://ifory.id/abstract/6aHftYpGdJ4F

Corresponding Author
Isra Mardia

Institutions
Departemen Pendidikan Matematika, Sekolah Pascasarjana,
Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung 40154, Indonesia

Abstract
Ethnomathematics as a field of study in mathematics education examines and studies mathematical ideas in various cultural activities practiced by ethnic, social or professional groups. This research was carried out as part of the exploration and inventory of ethnomathematics to reveal mathematical representations and formulate a system of calculations used in the Marosok trading tradition by the Minangkabau tribe in West Sumatra. The Marosok buying and selling tradition is the tradition of shaking hands with "marosok" or touching fingers covered with cloth (cover), between sellers and buyers with the aim of obtaining price agreements in buying and selling livestock using nonverbal communication. Qualitative approaches and ethnographic methods through the principles of data collection such as field notes, unstructured interviews, and documentation studies were used in this study. The findings of this study show that mathematical representations of finger and gesture symbols in the Marosok Tradition contain basic numbers one, two, three, four, five and two and a half as well as two types of operations, namely addition and subtraction. This mathematical representation is used to obtain other numbers needed in livestock buying and selling transactions using a certain formula.

Keywords
Ethnomathematics, Mathematical Representation, Marosok Tradition, Minangkabau

Topic
Mathematics Education

Link: https://ifory.id/abstract/6Rp9BHvTj2Er

Corresponding Author
Tia Purniati

Institutions
a) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*tpurniati[at]upi.edu
b) Program Studi Matematika, Universitas Islam Bandung, Jl. Tamansari No. 1, Bandung 40116, Indonesia

Abstract
Ethnomathematics is a program that studies the cultural aspects of mathematics. This program presents mathematical concepts in a way related to the cultural background of students. This study aims to explore ethnomathematics aspects of mosque buildings and ornaments. This study used a qualitative approach to exploration methods. The techniques of collecting data were observation, documentation, and literature reviews. The research location was the Great Mosque of Cimahi which was determined using purposive sampling. The results of the study show that there are ethnomathematics aspects of the mosque building and ornaments. The mathematical concepts of the mosque building and ornaments are related to the concepts of geometry and algebra. Mathematical presentations related to mosque buildings and ornaments are expected to help students to connect mathematics with the surrounding culture so that mathematics becomes more meaningful.

Keywords
ethnomathematics, mosque building, mosque ornament

Topic
Mathematics Education

Link: https://ifory.id/abstract/NTcRndAzGbek

Corresponding Author
Alberta Parinters Makur

Institutions
STKIP Santu Paulus

Abstract
This study discussed the exploration of mathematical concepts in Traditional Mat, Loce, as a product of Manggarai culture. This study aimed to describe the mathematical ideas contained in the Traditional Mat, Loce, Manggarai and how the linkages between the concepts found in the traditional mats, Loce, Manggarai and the topic of learning in schools. This research was qualitative research with ethnographic methods. Data collections were carried out through observation, interviews, and documentation. The subjects in this study consisted of 4 people, namely community leaders who could carry out Rojok Loce activities and the craftsmen. The results of this study indicated that there were several mathematical concepts found in the traditional mat, Loce, and had links in the topic of Mathematics learning in the School, namely the idea of fraction distribution, measurement, burial and measurement of the area of the flat building. The concept of fraction is when a craftsman mats a strand of pandanus leaves into several parts with an unequal size, the idea of measurement is still using traditional measurements of pagat and depa which are used to measure the length and width of the mat, the concept of mating during the mat making process the same form unit square to produce a mat and the concept of measuring the area of flat building when the mat is finished.

Keywords
Ethnomathematics, Loce, Manggarai culture, Traditional Mat

Topic
Mathematics Education

Link: https://ifory.id/abstract/gucYWmfywtAn

Corresponding Author
Aritsya Imswatama

Institutions
(a) Mathematics Education Program, Muhammadiyah Sukabumi University. iaritsya[at]gmail.com
(b) Early Childhood Teacher Education Program, Muhammadiyah Sukabumi University

Abstract
The purpose of this research is to describe mathematical element in traditional house in Geopark Ciletuh Sukabumi. The type of this research is qualitative research. This research is triggered by a such condition of the low knowledge of local cultures and wisdoms owned by the students. They need to increase their knowledge of cultures and local wishdoms to integrate into their school education. In this way, there will be an integration between culture and education in school. Data collection techniques used in this research are interview, observation and documentation, then the data obtained are analyzed by using data reduction, data presentation, verification and conclusion. The results of this study show that in the architecture of traditional house there are mathematical elements such as geometry and tessellation. The results of this study can be used as an innovation and learning materials in elementary school mathematics, so it will increase students knowledge related to the application of mathematics in everyday life. It is expected that etnomatematics may become an innovation of learning mathematics in school and motivate the students to learn math related to the cultures and local wishdoms.

Keywords
ethnomathematics; traditional house architecture

Topic
Mathematics Education

Link: https://ifory.id/abstract/kXjeZ8vmVN3M

Corresponding Author
Reni Wahyuni

Institutions
a) School of Postgraduate, Universitas Pendidikan Indonesia, Jalan Setiabudhi No. 229, Bandung, Jawa Barat, Indonesia
*reniwahyuni.2017[at]upi.edu

Abstract
Algebra is an essential topic in learning mathematics. It is a tool for solving the problem in the related phenomenon in our world. Algebra gives the students how to think systematically and coherently. In another hand, students are difficulties while explaining the algebra aspect. For that reason, we try to examine how and why the students have problems in learning algebra. Particular aspects it will continue to discuss that is concept equality, the equal sign, and variable. The method was chosen from this study is a qualitative method then the analysis by using description. This study shows that most students cannot solve the problem equality because they cannot understand the meaning of the equal sign. Then in the variable, students cannot examine the distributive role, they are incorrect while substituting.

Keywords
middle school student, algebra domain, variable, equality

Topic
Mathematics Education

Link: https://ifory.id/abstract/GYWc6PmgrVkh

Corresponding Author
SUJINAL ARIFIN

Institutions
(1) Mathematics Education Department of UIN Raden Fatah Palembang,
(2) Mathematics Education Department of Sriwijaya University

Abstract
This research is a descriptive qualitative research that aims to describe and examine problem-solving ability and the strategies used high school students for context “tourists attractions in Palembang”. The subjects of this study were 6 high school students in Palembang that consisting of 2 high-ability students, 2 medium-ability students, and 2 low-ability students. Data obtained through written test and interview. Based on analysis of students- solution showed that differences problem-solving strategies used students. high-ability students used more than three problem-solving strategies. Medium-ability students used two problem-solving strategies, and low-ability students employed only one strategy. The most frequently used strategies were looking for patterns, logical reasoning, making a model or diagram, trial and error.

Keywords
problem-solving ability, strategies, context, tourist attractions

Topic
Mathematics Education

Link: https://ifory.id/abstract/pxqNGCKXghM3

Corresponding Author
Sri Adi Widodo

Institutions
(1) Universitas Sarjanawiyata Tamansiswa
(2) Universitas Alma Ata

Abstract
The purpose of this paper is to know attitude of students of elementary school teacher education towards mathematics learning. The method used in this study is a qualitative approach. The sample is taken using cluster random sampling from second and fourth semester students of elementary school teacher education. Instrument used in this research is questionnaire. The results of the research show that the attitude of students of Elementary School Teacher Education, in one of the universities towards learning mathematics in the very high category.

Keywords
attitude; mathematics; learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/ZdpN34AvTPYJ

Corresponding Author
Redi Hermanto

Institutions
(a) Universitas Siliwangi, Jl. Siliwangi No. 24, Tasikmalaya, Indonesia
(b) Universitas Pendidikan Indonesia, Jl. Setiabudi No. 229, Bandung, Indonesia

Abstract
Ethnomathematics is a study that observes how certain society groups understand, articulate, and use mathematical concepts or ideas in their lives. The indigenous people of Kampung Naga have a diversity of cultures, traditions, and value systems that are still well cared and maintained until to day. This cultural activity is patterned, structured, and has a form in daily life and has become a belief that is embedded in the form of local wisdom. This study aims to explore the concept of ethnomathematics that emerged and was pragmatically involved in the daily life activities of the Kampung Naga indigenous people based on a review of aspects of mathematics. This research is a qualitative study using ethnographic models.

Keywords
Ethnomathematics, Lokal Wisdom, Kampung Naga

Topic
Mathematics Education

Link: https://ifory.id/abstract/6TzVyJcLmFAN

Corresponding Author
Iwan Gunawan

Institutions
Universitas Langlangbuana

Abstract
Abstract. This study aims to explore the teacher performance in teaching understunding mathematical concepts of Junior High School. Three teachers were taken as participants. The method use in this researsh is qualitative with grounded theory design appoach. Data was obtained by analyzing the learning videos then confirmed by interviews to reveal the perceptions of the three teachers in teaching understanding of mathematical concepts. Based on data analysis, three categories of teacher performance appear, namely adequate performance, good performance and excellent performance. The three performance categories are seen from aspects of morality in teaching, reflection after teaching, effectiveness in teaching, and interaction with students. These aspects are contained in a performance rubric. Furthermore, the three categories will be described in this paper.

Keywords
Teachers Performance, Teaching, Conceptual Understanding.

Topic
Mathematics Education

Link: https://ifory.id/abstract/bHY4eTzXBA8v

Corresponding Author
Winda Ramadianti

Institutions
a) Universitas Pendidikan Indonesia
b) Universitas Muhammadiyah Bengkulu

Abstract
Fractions are mathematical concepts that are much applied in mathematics topic. Interpretation of fractions in a topic can be different with others topic. Fractions interpretation is an important thing to be understood by pre-service mathematics teachers. Their interpretation can influence their teaching. To investigate their interpretations of fractions, we asked 35 pre-service mathematics teachers to interpret 4/5. The results showed that only 19 participants in the study could interpret fractions as part of whole, quotient, and ratio. There are not participanst which interpret fraction as operator and measures. These results indicate that although pre-service mathematics teachers often use fractions in mathematics topic since elementary school to university, their interpretation of fractions is still incomplete.

Keywords
fraction

Topic
Mathematics Education

Link: https://ifory.id/abstract/urZA6xQKtTj7

Corresponding Author
Wardani Rahayu

Institutions
(1*.2) State University of Jakarta, JL. Rawamangun Muka Jakarta Timur 13220 Indonesia

Abstract
The purpose of this study is to find out how the dimensions, aspects, and items of classroom culture instruments. This study was adopted from the interpretive-constructivist paradigm using the quality methodology. Research subjects were 9 experts who were randomly. Instrument modification from WIHIC is with dimensions of teacher support, involvement, investigation, authentic task orientation, cooperation, equity, access, interaction, transformation, and using technology. The results showed that the assessors provided advice and input in examining the appropriateness of the dimensions, items and aspects being assessed. Systematically the preparation of PPG class culture instruments produced 54 items that were declared valid based on expert agreement. Existing statement items met various measurement criteria that can be used to measure the class culture of PPG students in Indonesia. The dimension that needed to be corrected was the authentic task orientation indicator. Almost all experts provided improvement in aspects of language.

Keywords
class culture, expert validity, WIHIC

Topic
Mathematics Education

Link: https://ifory.id/abstract/KXvkzYVUr2MA

Corresponding Author
Nelly Fitriani

Institutions
IKIP Siliwangi

Abstract
This research is conducted due to low mathematical abstraction ability of junior high school students, since that mathematical abstraction is an important skill for both male and female students so that it is considered important to study gender factors for mathematical abstraction abilities. The objective of this research is to find out whether there is a significant difference between male and female mathematical abstraction abilities after using scientific approach supported by Excel VBA. This research was conducted to 16 female students and 15 male students of 9th grade at one of the junior high schools in West Bandung, Indonesia. The method in this study is quasi experimental by comparing the abstraction abilities of male and female students after being through by scientific approach assisted by Excel VBA. The instrument of this research is 3 questions about mathematical abstraction questions. The results of this study indicate that there are significant differences in mathematical abstraction between male and female students for some indicators after using the Scientific approach assisted by VBA Excel, this means the Scientific approach which assisted by Excel VBA can show the differences of mathematical abstraction between male and female students.

Keywords
mathematical abstraction; Gender

Topic
Mathematics Education

Link: https://ifory.id/abstract/WRg6Apb92czw

Corresponding Author
Nur Hidayati Firdiani

Institutions
a) Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl Dr. Setia Budhi No. 229, Bandung 40154, Indonesia
*nurfirdiani[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia

Abstract
Communication skills were one of the abilities needed in the 21st century, but the reality showed that students mathematical communication skills were still low. The aim of this study was to analyze the mathematical communication abilities of male and female students for the content of Space and Shape. The research method used was the qualitative research method. The participants of the study were 6 male students and 6 female students of class VIII Junior High School with age characteristic between 13 -14 years old and have the ability of high, medium and low in mathematics. Data was collected by using test and interview. Data analysis used includes data reduction, data collection, and conclusions. The study results showed that both male and female students with high abilities in general mathematics are able to express situations in the form of pictures or mathematical models, analyze and evaluate mathematical ideas in other forms, but male and female students who have medium and low abilities in general mathematics still have difficulty expressing situations in the form of drawings or mathematical models, analyzing and evaluating mathematical ideas in other forms.

Keywords
Gender; Mathematical Communication

Topic
Mathematics Education

Link: https://ifory.id/abstract/cgHb3NRaXUKY

Corresponding Author
Hery Sutarto

Institutions
Universitas Negeri Semarang

Abstract
The Central Java contingent is a contingent who often holds the overall title in the National Science Olympiad (OSN) competition with the DKI Jakarta contingent. From 17 OSN implementation since 2002, the Central Java contingent held the title 10 times, and the rest were taken by DKI Jakarta. Many factors influence a team to become champions, namely students as active actors, mentors, and also provincial education offices. This article materialized from the authors experience to become the Central Java Province OSN advisory team for elementary and junior high school for mathematics. Hopefully, this experience can be a reference for other provinces in guiding their best students so that it will be more competitive in the National Science Olympiad event.

Keywords
good practice ; mathematics ; olympiad

Topic
Mathematics Education

Link: https://ifory.id/abstract/j9p3dZBryaTw

Corresponding Author
Indra Siregar

Institutions
(a) STKIP Sebelas April
*dracakep[at]yahoo.co.id
(b) Universitas Pendidikan Indonesia

Abstract
The Study is a part of research on article at Journal of Physics: Conference Series which were published in 2017. At the article, has be showed the implementation of Greens motivational strategies at teaching material in mathematics teaching, but the explanation is to simple. On this article, will be explained more considerable about the implementation of Greens motivational strategies at teaching material. Beside that, will be explained another findings which not published on the last article. One of the findings is the teaching material which be made based on Greens motivational strategies can make student get more motivation and confidence in mathematics problem exercise without motivational speech from teacher or other motivational activity like hypnosis. The content of the teaching activity on the class is full of mathematics problem exercise. Greens motivational strategies can become new style on mathematics teaching and of course become new hope to make Indonesian mathematics education be better on the future.

Keywords
Greens Motivational Strategies, motivation

Topic
Mathematics Education

Link: https://ifory.id/abstract/fgMYRcUpH3GA

Corresponding Author
Putri Astuti

Institutions
Universitas Pendidikan Indonesia

Abstract
This research is motivated by learning obstacles (LO) on the counting principle concepts. One of them is the students-s difficulty in using the product rule concept when it is combined with other counting principle concepts in solving problems. This study aims to develop a didactical design to overcome the LO by following didactical design research steps. The method used in this research was a qualitative method and the data collection was collected by using observation, documentation, and test. The design was implemented in 39 senior high school students at the eleventh grade in science program, one of the schools in Bandung city. The results showed that some of student-s responses had been accordance with predictions, but several other could not be anticipated, and didactical design implemented had not made all students understood the product rule concept optimally, and LO could not be overcome significantly. Therefore, this didactical design still needs to be developed in order to be created a better didactical design.

Keywords
learning obstacle, didactical design, counting principle, counting rule, representation

Topic
Mathematics Education

Link: https://ifory.id/abstract/PRK6CWENxnbM