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91	Mathematics Education	ABS-8
COMPARISON OF MATHEMATICS LEARNING OUTCOMES THROUGH PROBLEM SOLVING AND PROBLEM POSING APPROACHES TO CLASS IV STUDENTS OF MAKASSARS RAMA SEJAHTERA PRIVATE ELEMENTARY SCHOOL Erwin Nurdiansyah Universitas Islam Makassar Abstract Abstract: This type of research is an experimental study involving two groups given different treatments. This study aims to find out there is a difference between the results of mathematics learning in fourth grade students of Rama Sejahtera Private Elementary School in Makassar City between those taught using a problem solving approach and those taught using a problem posing approach. The population of this study was fourth grade students of Makassar City Rama Sejahtera Private Elementary School in the even semester 2018/2019 which consisted of 3 classes and 2 randomly selected classes as the research sample. Data collection techniques were carried out using learning outcomes tests (pretest and posttest) and observation sheets. The collected data was analyzed using descriptive and inferential statistical analysis techniques. The results obtained from descriptive statistical analysis are: (1) Mathematics learning outcomes of students taught by using problem solving approaches are in the high category with an average of 73.36 and standard deviation of 10.20 of the ideal score of 100. (2) Learning outcomes Mathematics students taught by the problem posing approach are in the low category with an average of 67.96 and standard deviation of 8.29 from the ideal score of 100 Keywords: Mathematics learning outcomes, problem solving and problem posing Share Link | Plain Format | Corresponding Author (Erwin Nurdiansyah)

92	Mathematics Education	ABS-9
The Improvement of Mathematical Communication Ability of Elementary School Students Through Project Based Learning Using Mind Map Technique Laely Farokhah (a*), Fatma Nurmulia (a), Tatang Herman (b), Al Jupri (b), Vira Pratiwi (c), Nunuy Nurkaeti (c), Zaenal Abidin (d) a) Program Studi Pendidikan Guru Madrasah Ibtidaiyah, Fakultas Agama Islam, Universitas Muhammadiyah Jakarta, Jl. K.H. Ahmad Dahlan, Ciputat, Jakarta Selatan, Indonesia *laely.farokhah[at]umj.ac.id b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia c) Pendidikan Guru Sekolah Dasar, Fakultas Ilmu Pendidikan, Universitas Bhayangkara Jakarta Raya, Jl. Perjuangan Raya, Bekasi Utara, Indonesia d) Pendidikan Guru Sekolah Dasar, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Muhammadiyah Surakarta, Jl. A. Yani Tromol Pos 1, Mendungan, Pabelan, Kec. Kartasura, Kabupaten Sukoharjo, Jawa Tengah, 57162, Indonesia Abstract Mathematical communication is one of the important abilities for students to face the challenges in this era. The fact-based on the preliminary study conducted by researchers on students in elementary school showed that most students find difficulties in communicating mathematical ideas. The present study is aimed to describe whether the improvement of mathematical communication ability between students who learn through project based learning using mind map technique is better than students who learn through project based learning without mind map technique. This study used a quasi-experiment using a non-equivalent group design. Sixty-three students of one of elementary school in Bandung city were taken as subject of this study. The instrument of this study used mathematical communication test. The data were analyzed using non parametric statistics. The result showed that the improvement of mathematical communication ability of students who learn through project based learning using mind map technique is better than the improvement of mathematical communication ability of students who learn through project based learning without mind map technique. Keywords: Mathematical Communication- Project Based Learning- Mind Map Share Link | Plain Format | Corresponding Author (Laely Farokhah)

93	Mathematics Education	ABS-266
Study Ethnomathematics: Revealing Mathematics Ideas on Minangkabau Traditional Weaving Songkets in Pandai Sikek Enmufida, Turmudi, Asep Syarif Hidayat Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia Abstract This study aims to prove a mutual relationship between mathematics and culture. Due to an assumption that mathematics does not have any relationship with each kind of culture. However, a study about ethnomathematics scruitinizes a group of culture as mathematical. This research takes place in Pandai Sikek. Tanah Datar Regency. West Sumatera. People in Pandai Sikek are the biggest producers of songket in Minangkabau. Pandai sikek still keeps on their culture tightly, one of them is the women of pandai sikek do the weaving hereditary. This research focuses on revealing a mathematical idea beyond traditional songket Minangkabau at Pandai Sikek. This study of ethnomathematics uses a qualitative approaching of an ethnography method. The data were collected through observation, interview and study documentation. The result of the research is to reveal a mathematical idea that is used by Pandai Sikek people on manufacturing songket that there are mathematic activities and geometry patterns in traditional songket pattern of Minangkabau. This research enlights people that mathematics has relationship with culture. Keywords: Study Ethnomathematics, people of Pandai Sikek, Songket (weaving) Share Link | Plain Format | Corresponding Author (ENMUFIDA ENMUFIDA)

94	Mathematics Education	ABS-13
Neuro Linguistic Programming for Academic Cheating in Mathematics Classes Widodo Winarso (*), Faiz Fatihul ‘Alwan Department of Mathematics Education, Institut Agama Islam Negeri Syekh Nurjati Cirebon, Indonesia *widodoiain[at]gmail.com Abstract The purpose of this research is to determine and identify the factors responsible for academic cheating in mathematics learning using the Neuro Linguistic Programming (NLP). This is a qualitative research with the Miles and Huberman data analysis techniques consisting of reduction, presentation, and drawing conclusions used as a case study design. Data were collected from students at Senior High School-Indonesia by using interviews and still image data collection techniques. The results showed that there are 14 forms of academic cheating in mathematics learning, which are classified into plagiarism, fabrication, exploitation of other peoples weaknesses, wrong cooperation, attempts to cheat before the test, use of prohibited tools during the exam, and manipulation of assignments. A total of 12 factors trigger academic cheating in mathematics learning, these include internal, external, learning, and academic cheating resistance factors. The identification results using NLP showed some students do not aim to commit in academic cheating. However, a total of 9 obstacles were in accordance with their viewpoints using the frame and metamodels. Therefore, students assume academic cheating is an appropriate action to respond to a situation Keywords: Academic Cheating; NLP; Mathematics Learning Share Link | Plain Format | Corresponding Author (Widodo Winarso)

95	Mathematics Education	ABS-269
Mathematical creative thinking ability of junior high school students on polyhedron Y Junaedi (a*), Wahyudin (b), D Juandi (b) Universitas Pendidikan Indonesia Abstract Mathematical creative thinking ability is an important component that must be possessed by students because the problems in modern times are very difficult and require a high level of problem solving. The aims of this research is to illustrate and analyze the mathematical creative thinking ability of junior high school students on polyhedron topic. This research used a qualitative descriptive research approach and case study reseach design. Data collection techniques used in the form of written tests and interviews. The subjects was chosen from 35 students of class VIII in MTsN 1 Kota Serang in the academic year 2019/2020. This research used inductive data analysis techniques, the steps in analyzing data include: data reduction, data display, conclusions drawing and verification. The results showed the students mathematical creative thinking ability on polyhedron was in the medium category with a percentage in the high category 14%, medium category 69%, and low category 17%. The percentage of mathematical creative thinking ability based on aspects shows the aspect of originality 59%, fluency 61%, flexibility 62%, and elaboration 75%. Keywords: Mathematical creative thinking ability, The aspect of mathematical creative thinking ability Share Link | Plain Format | Corresponding Author (Yusup Junaedi)

96	Mathematics Education	ABS-270
Concept Image on Derivative: Case Study of Pre-service Mathematics Teachers A Prihandhika, D Suryadi, and S Prabawanto Mathematics Education, Universitas Pendidikan Indonesia Abstract This study aims to uncover the zone of difference between the concept image of pre-service mathematics teachers and the formal concept definition of derivative. Concept image explains how the subject provides an interpretation of a concept. While formal concept definition is a concept defined as a form of words used to determine concepts that are accepted or agreed upon by the community of mathematicians in general. The study was conducted with a qualitative method with an interpretive phenomenological approach to explore the experience and knowledge of the subject. Data were obtained through clinical tests and interviews were given to three prospective mathematics teacher students at a university in West Java. Ideally, the concept image formed in the subject^s cognitive structure of a concept must be the same as the existing formal concept definition. However, the results of the study indicate that there are still differences that occur between the concept image of prospective mathematics teacher students and the formal concept definition that causes cognitive conflict in the derivative. Keywords: Concept Image, Derivative Share Link | Plain Format | Corresponding Author (Aditya Prihandhika)

97	Mathematics Education	ABS-271
Constructing Mathematical Literacy-Items with Coronavirus Disease (COVID-19) as a Context Fitri Anisa Kusumastuti, Bambang Avip Priatna Martadiputra, Dadang Juandi Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia Abstract This study aims to produce a set of mathematical literacy-items with Coronavirus Disease (COVID-19) as a context that is valid to assess students^ mathematical literacy. Steps used in this study consist of analyzing, designing, theoretical validation, revising, limited testing to students, and evaluating. Written tests were conducted to collect seventh-grade students of junior high school data. Mathematical literacy items consist of three items with three indicators and competency clusters. The indicators are formulating, employing, and interpreting mathematics. The results show that the mathematical literacy items which are produced have been valid and practical, so it can be used to assess mathematical literacy ability. Keywords: Coronavirus disease, COVID-19, Mathematical literacy, PISA-items Share Link | Plain Format | Corresponding Author (Fitri Anisa Kusumastuti)

98	Mathematics Education	ABS-273
Developing Mathematics Activity Book for Kindergarten based on Iceberg Theory A D Handayani*, D Yulianto, D D Yohanie, Samijo and Darsono Universitas Nusantara PGRI Kediri Abstract Cognitive development that must be considered in kindergarten is the ability to count which includes the concepts of addition and subtraction. Abstract mathematical concepts are not always well received by kindergarten students. Therefore, to support optimal child development, appropriate stimulants are needed. Some kindergarten students experience still have difficulties in summing numbers abstractly. There are also those who have difficulty in the counting process, both outlining and adding up. In addition, there are also students who are less able to write the large number of objects into numerical symbols. Given the various difficulties that can be experienced by kindergarten students in learning the concepts of addition and subtraction, one way that can be used to introduce the concepts of addition and subtraction in kindergarten students is by using the Iceberg approach. Iceberg is known as an iceberg phenomenon. The process of forming icebergs in the sea always starts from the bottom beneath the surface of the sea and so on finally forms the tip of the iceberg that appears above sea level. The base of the iceberg is wider than its peak, thus the construction of the iceberg becomes sturdy and stable. Introducing a mathematical concept based on the Iceberg approach means that in the iceberg model there are four levels of activity, namely: 1) mathematical orientation of the environment, 2) Model of teaching aids, 3) making of foundations (Building stone), and 4) formal mathematics. With this step it is hoped that kindergarten students who are still in the pre-operational stage can more easily understand abstract mathematical concepts because the concept begins with the introduction of concrete objects around students. The purpose of this study is to developing mathematics activity books based on the Iceberg theory to introduce the concepts of addition and subtraction for kindergarten Keywords: Mathematics activity book, kindergarten, iceberg Share Link | Plain Format | Corresponding Author (Aprilia Dwi Handayani)

99	Mathematics Education	ABS-18
Symbolic measuring: an exploration of ethnomathematics based on community daily communication Uba Umbara(a,b*), Wahyudin(c**), Sufyani Prabawanto (c***) a) School of Postgraduate Studies, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budi No. 229, Bandung 40154, Indonesia b) Department of Mathematics Education, STKIP Muhammadiyah Kuningan, Jl. Moertasiah Supomo No. 28B, Kuningan 45511, Indonesia *uba.bara[at]upmk.ac.id c) Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budi No. 229, Bandung 40154, Indonesia **wahyudin.mat[at]upi.edu,***sufyani[at]upi.edu Abstract The purpose of this study is to show that ethnomathematics has an important role in peoples daily communication. This study discusses the exploration of existing symbolic measuring instruments used by the Cigugur indigenous community in their daily activities. The research uses a phenomenological approach that can strengthen the study of a comprehensive analytical framework in describing experiences experienced by people based on phenomena. Meanwhile, ethnomathematics design adopts four elements consisting of generic questions, initial answers, critical constructs, and specific activities. Research findings show that people are accustomed to using symbolic measuring instruments rather than formal measuring instruments. Through the use of assumptions, researchers describe and demonstrate the relevance of symbolic measuring instruments with formal instruments that are internationally recognized. The results showed that the indigenous communities of Cigugur possessed and applied ethnomathematics in their lives for generations, so it can be concluded that ethnomathematics is part of their lives and cultural roots which are included in the language system in the universal cultural elements. Keywords: Symbolic measuring, ethnomathematics, daily communication Share Link | Plain Format | Corresponding Author (Uba Umbara)

100	Mathematics Education	ABS-19
The development of ICT learning based on interactive mathematics games in junior high schools Uba Umbara (a,b*), EFW Puadi (a), Munir (c), R Susilana (d) a) Department of Mathematics Education, STKIP Muhammadiyah Kuningan, Jl. Moertasiah Supomo No. 28B, Kuningan 45511, Indonesia *uba.bara[at]upmk.ac.id b) School of Postgraduate, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budi No. 229, Bandung 40154, Indonesia c) Department of Computer Science, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budi No. 229, Bandung 40154, Indonesia d) Department of Educational Technology, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budi No. 229, Bandung 40154, Indonesia Abstract The development of ICT in learning mathematics is one of the innovative efforts that can be used as an alternative to the development of mathematical learning models. Based on these arguments, the aim of this research is to develop ICT learning tools based on interactive mathematical games in junior high schools called domino algebra. This research is a research development of multimedia prototypes based on interactive mathematical games. The results of the development show the average value of the media expert validation test was 4.62, while the average value of the content content expert validation was 4.81. The practicality test results of the usage by the teacher get a value of 4.72 while the average practicality test results by students are one to one try out evaluations, small group evaluations, and field evaluations with a total of 20 students getting an average value of 4.63. Based on these data, ICT learning based on interactive mathematical games developed is declared suitable for use in mathematics learning in junior high schools. Keywords: ICT learning- interactive mathematics games- Domino Algebra: junior high schools Share Link | Plain Format | Corresponding Author (Uba Umbara)

101	Mathematics Education	ABS-20
Gifted childrens mathematical reasoning abilities based on problem-based learning and project-based learning literacy Zaenal Abidin (a*), Tatang Herman (b), Al Jupri (b), Laely Farokhah (c), Vira Pratiwi (d) a) Program Studi Pendidikan Guru Sekolah Dasar, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Muhammadiyah Surakarta, Jl. A. Yani, Mendungan, Pabelan, Kec. Kartasura, Kabupaten Sukoharjo, Jawa Tengah 57162, Indonesia *za825[at]ums.ac.id b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung 40154, Indonesia c) Program Studi Pendidikan Guru Madrasah Ibtidaiyah, Fakultas Agama Islam, Universitas Muhammadiyah Jakarta, Jl.K.H. Ahmad Dahlan, Ciputat, Jakarta Selatan, Indonesia d) Pendidikan Guru Sekolah Dasar, Fakultas Ilmu Pendidikan, Universitas Bhayangkara Jakarta Raya, Jl. Perjuangan Raya, Bekasi Utara, Indonesia Abstract This article describes gifted children mathematical reasoning abilities. They have a natural talent that must be facilitated, namely reasoning. In mathematics, problem-based learning, project-based learning literacy and inquiry are learning models commonly used. Mathematics learning can improve the ability of mathematical reasoning because children are required to think logically. The research method was quantitative with the randomized pretest-posttest control group design. This research was conducted in three special classes of gifted children. The results showed that the reasoning of gifted children who obtained problem-based learning was better than gifted children who obtained other learning. It was caused by activities that always present problems contextually with everyday life. Then, gifted children were always required to be problem solvers by conducting in-depth investigations and collaborating with friends. Gifted children who get project-based learning literacy have good mathematical reasoning skills. It was because gifted children were required to make literacy work oriented to the mathematical problems presented. Furthermore, gifted children who obtain inquiry learning have a middle ability. Gifted children were asked to find mathematical concepts so that learning is meaningful. Keywords: Gifted Children, Reasoning, Mathematics, Elementary School, Learning Model Share Link | Plain Format | Corresponding Author (Zaenal Abidin)

102	Mathematics Education	ABS-23
Prior knowledge of students in Analytical Geometry in terms of Gender Analyzed Using the Rasch Model Eyus Sudihartinih- Sufyani Prabawanto Department of Mathematis Education UPI Abstract Prior knowledge and gender are essential parts of learning. Therefore the purpose of this study is to describe the prior mathematical proficiency of students in terms of gender analyzed by the Rasch model. Participants consisted of a class of second-semester students who contacted analytic geometry courses comprised of 11 men and 29 women at one of the universities in Indonesia. The research instrument was a test item describing five questions about points and lines in the plane. The results showed students answered questions according to their level of ability, and there was no gender bias. Therefore in learning that will carried out in groups should be heterogeneous from the prior level of mathematical and gender prior knowledge. Keywords: Prior knowledge, Analytical Geometry, Gender, Rasch Model Share Link | Plain Format | Corresponding Author (Eyus Sudihartinih)

103	Mathematics Education	ABS-279
Analysis of the effectiveness of learning mathematics using Project Based Learning Models in Junior High School Bina Satria T.P 2016/2017 Riki Juanda*, Efri Diana Barus Universitas Negeri Medan Abstract The purpose of this study was to answer the questions in this study How is the effectiveness of Learning using the Project Based Learning Model in Bina Satria T.P 2016/2017 Middle School Students.The method used is a quantitative descriptive method. The instruments used were tests, observations and questionnaires. In the initial test results obtained an average of 54.00. While the final test obtained an average student learning outcomes of 83.7 with 29 students who completed and 5 students who did not complete. In terms of the percentage of students^ activities getting 77.75% and being in the category of Not Effective in their learning activities, in terms of the ability of the teacher in managing learning to get a percentage of 87.5% and being in the category of Effective in managing learning, in terms of the responses of students getting a percentage amounted to 84.7% and was in the category of Not Effective in responding to learning in the classroom. Based on the description above, it can be concluded that mathematics learning is carried out using the Project Based Learning model on effective Circle material in grade VIII-1 students of SMP Bina Satria T.P 2016/2017. Keywords: The effectiveness of student mathematics learning, Project Base Learning Model Share Link | Plain Format | Corresponding Author (Riki Juanda)

104	Mathematics Education	ABS-280
Development of interactive media based on mathematics with HOMTS and learning by doing orientation F Fadilah(a)*, R Priyanda(b), and R Amalia(c) Department of Mathematics Education, Universitas Samudra, Kota Langsa, Indonesia Abstract This research is a Research and Development (R&D) of interactive media, namely lectora inspire based on ethnomathematics with HOMTS orientation and learning by doing. The steps in this research are (1) potential problems- (2) data collection- (3) product design- (4) design validation- (5) design revisions- (6) product trials- and (7) product revisions. The results showed that lectora inspire based on ethnomathematics with HOMTS orientation and learning by doing is appropriate to be used as interactive media in learning linear equation systems for senior high school students. Keywords: HOMTS- Ethnomathematics- lectora Share Link | Plain Format | Corresponding Author (Fadilah, S.P., S.Pd.,M.Pd)

105	Mathematics Education	ABS-27
Achievement Emotions of Female students in Mathematical Problem-Solving Situations Suparman (a*), Dadang Juandi (b), Tatang Herman (c) a,b,c) Department of Mathematics Education, Indonesia University of Education, Jalan Dr. Setiabudi No.229, Bandung 40154, Indonesia *arman95[at]upi.edu Abstract Achievement emotions have an important role in the students mathematics learning outcomes. The dynamic of achievement emotion in mathematics learning evaluation is very important to be considered by the teachers so that student academic achievement can increase. This study was conducted to investigate the female students achievement emotions in mathematical problem-solving situations that involved 50 seventh grade female students by using a purposive sampling technique. Data on achievement emotional questionnaires and mathematical problem-solving ability tests were analyzed using the Wilcoxon test and Kendals Tau correlation test. The findings show that the mathematical problem-solving situation has a significant small negative effect in decreasing the students joyful emotion, and has a significant small positive effect in increasing the students hopeless emotion. Other findings show that there is a significant moderate correlation between the mathematical problem-solving ability level and the students joyful emotions after the test. This finding recommends for mathematics teachers that it is important to condition and improve a high control perception and belief value in students-self in following mathematics learning evaluation so that a well-controlled emotional condition of students achievement can be created and have an impact on good student mathematics learning outcomes and achieving of mathematics learning goals. Keywords: Achievement Emotions, Mathematical Problem-Solving Situations Share Link | Plain Format | Corresponding Author (S Suparman)

106	Mathematics Education	ABS-28
USING HAWGENT DYNAMIC MATHEMATICS SOFTWARE TO PROVE PYTHAGORAS THEOREM Tommy Tanu Wijaya, Ying Zhou, Yi Lin, Lijie Zhang guangxi normal university Abstract In this research, researchers will design a learning media using Hawgent dynamic mathematics software on the Pythagoras theorem based on the difficulties faced by the teachers when explaining Pythagoras theorem to the students. This research will use the ADDIE model. Based on the analysis result from the media and material expert, Hawgent dynamic mathematics software can be use to explain the basic concept of Pythagoras theorem and based on the field trial, 14 schools in Indonesia shows a positive response towards Hawgent dynamic mathematics software. The class trial also shows that students were more active and they were able to understand the concept of basic Pythagoras theorem when teacher explained the concept using Hawgent dynamic mathematics software. based on the validation result from the media expert which shows that Hawgent falls in the excellent category, the validation result from the material expert which shows that Hawgent falls in the excellent category. Keywords: Hawgent Dynamic Mathematics software, Pythagoras theorem Share Link | Plain Format | Corresponding Author (Tommy Tanu Wijaya)

107	Mathematics Education	ABS-284
REACT Strategy toward Mathematical Communication Abilities of Madrasah Ibtidaiyah Students Siti Nuriah (a*), Nunung Sobarningsih (b), Muhammad Rifqi Mahmud (c) (a) Integrated Islamic Elementary School Insan Rahayu, Jalan Raya Rancaekek Majalaya KM 05, Kabupaten Bandung, Indonesia *nuriah27[at]gmail.com (b) Mathematics Education Department, UIN Sunan Gunung Djati Bandung, Jl. Cimencrang Gedebage, Bandung, Indonesia (c) Madrasah Ibtidaiyah Teacher Education Department, UIN Sunan Gunung Djati Bandung, Jl. Cimencrang Gedebage, Bandung, Indonesia Abstract This study aims to figure out the students mathematical communication skills on the subject of the volumes of cubes and cuboids for the students taught with REACT strategy were better than those who taught with conventional learning. The research method used was a quasi-experimental design of The Nonequivalent Pretest-Posttest Control Group Design conducted on students in one of the Madrasah Ibtidaiyah (MI). Based on the results of the study it was concluded that the students mathematical communication skills who acquired learning with the REACT strategy were better than those who applied conventional learning. Keywords: Mathematical Communication, REACT Strategy, Volume of Beam, Volume of Cube Share Link | Plain Format | Corresponding Author (Siti Nuriah)

108	Mathematics Education	ABS-288
Relational Thinking in Early Algebra Learning: A Systematic Literature Review Meri Andini, Sufyani Prabawanto Mathematics Education Study Program School of Post Graduate Studies Universitas Pendidikan Indonesia Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia Abstract Algebraic thinking in early grades has taken a lot of researchers^ attention since a few decades ago until now. A number of students ^difficulties in learning early algebra have been linked to deficiencies in learning during students^ transition from arithmetic to algebra. This study aims to analyze relational thinking- a way of thinking that is a bridge between arithmetic thinking and algebraic thinking. Through a systematic literature review method, researchers analyzed 26 articles from at least 20 journals. Researchers focus on the characteristics of relational thinking, its relation to early algebra learning, and the problems and teaching solutions that have been raised by previous researchers. As a result and implication, various lesson designs that develop this type of thinking have been presented as solutions to the many problems associated with early algebra learning. This research is expected to be the basis of how to make lesson designs that can anticipate deficiencies in arithmetic learning when students have entered early algebra learning. Keywords: Arithmetic- algebraic thinking in early grades- early algebra- relational thinking. Share Link | Plain Format | Corresponding Author (Meri Andini)

109	Mathematics Education	ABS-289
Application of Listening Team Learning Model in Improving Middle School Students Mathematical Reasoning Ability Nurul Wahyu Utami* and Elah Nurlaelah *Postgraduate School in Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia Abstract This study uses classroom action research conducted in Al-Mashum Middle School in Cianjur, West Java. It aims to determine the effectiveness of the Listening Team method toward students^ mathematical reasoning ability. The data is obtained by using a test instrument that is divided into two cycles, cycle 1 and 2 and implementing a students and teachers observation. The result shows that- (a) By using the Listening Team method, the students and teachers activity in cycle 1 has increased with the value of 56.9 of the average students mathematical reasoning ability. (b) In cycle 2 has increased with the value of 73.1. It shows that there is an improvement in students^ mathematical reasoning ability from cycle 1 to cycle to by the value of 16.2 Keywords: Listening Team, Mathematical Reasoning Share Link | Plain Format | Corresponding Author (NURUL WAHYU UTAMI)

110	Mathematics Education	ABS-295
BLENDED LEARNING ^LEARNING MATHEMATICS OF THE FUTURE^ Rika Mulyati Mustika Sari1, Nanang Priatna2 1 Sekolah Pascasarjana Universitas Pendidikan Indonesia ,  mrizki.fathoni82[at]gmail.com 2 FMIPA Universitas Pendidikan Indonesia,  nanangpriatna[at]upi.edu Abstract Abstract Writing this article provides an overview of mathematical learning strategies that can be used in the struggle of the industrial revolution 4.0 on world education in Indonesia. Meanwhile, the background to discuss this article is to explain one of today^s learning strategies, namely Blended Learning. In this article, the characteristics of blended learning strategies, the procedures for implementing blended learning in mathematics learning, and the philosophical foundation for blended learning will be examined. Keywords: Blended Learning, Learning strategy Share Link | Plain Format | Corresponding Author (Rika Mulyati Mustika Sari)

111	Mathematics Education	ABS-40
The Effect of implementing the Explicit Instruction Model towards the understanding of student concept on polyhedron material in 8th Grade Junior High School Maryetta Evi Hariati*, Restu Desrijab Universitas Negeri Medan Abstract Abstract. Most students only try to memorize every concept taught by the teacher without understanding it. This study aims to describe the effect of applying Explicit instruction learning models on the understanding of mathematical concepts of students in the 8th grade of junior high school on polyhedron material. This type of research is a descriptive study with a quantitative approach. The research design used was a random posttest only control design with two sample classes, each of which was given a posttest. The method of data collection uses the test item description and observation sheet. Data analysis used two party ttest and a description of the effect of applying the model was seen from the observation sheet. Hypothesis testing using t test, from the data processing results obtained thitung>ttabel namely 3.552736895>2.060 so that H1 is accepted, it can be concluded that the sample class has differences. With an average test of the ability to understand concepts and standard deviations of each class, the experimental class was 75.71 and 10.26 while the control class was 67.61 and 10.61. Then the results of this study concluded that the application of the explicit instruction learning model affects students understanding of mathematical concepts. Keywords: Explicit Instruction, Concept Understanding Share Link | Plain Format | Corresponding Author (Maryetta Evi Hariati)

112	Mathematics Education	ABS-296
Designing a pocket book to support students in ordinary differential equation online learning: a need analysis Ronal Rifandi(1*), Maulani Meutia Rani(1), Trysa Gustya Manda(1) (1) Mathematics Education, Universitas Negeri Padang, Jl. Prof. Dr. Hamka, Padang, Indonesia Universitas Negeri Padang (*) r.rifandi[at]fmipa.unp.ac.id Abstract This study aimed to investigate the need for developing a pocket book as a suplementary materials in supporting students who study ODE through online learning platform. This research is a qualitative study. The subject of this study is 73 students of Mathematics Department of UNP who took ODE course in the academic year of 2019/2020. They experienced learning through e-learning portal of UNP. The techniques in collecting data is by giving an online questionnaire to the participants. The result of this study shows that lecturer need to design a pocket book for ODE course in order to support students in the online learning process. Keywords: pocket book, ordinary differential equation, online learning Share Link | Plain Format | Corresponding Author (Ronal Rifandi)

113	Mathematics Education	ABS-41
Development of Mathematics Learning Devices Matrix Material in MAS Al-Washliyah 22 Tembung 2017/2018 School Year Santi Maria Simarmata*, Dinda Sry Delima Universitas Negeri Medan Abstract This research aims to develop mathematical Learning devices that are valid, practical and effective. This research is a type of research development of Thiagarajan models. The subjects of research is class X IIS-B MAS Al-Washliyah 22 Tembung. The objects of research are lesson plans, teaching materials, student activity sheets, learning media and learning outcomes tests. The results of the research: 1) The lesson plans is developed using the Discovery Learning in accordance with the principles of developing and compiling 2013 curriculum process standards- 2) Teaching Materials that are developed using the Discovery Learning in accordance with the principles of developing teaching materials both the aspects of the appropriateness of the content, presentation of the material, language, practice and truth- 3) Sheets of student activity developed in accordance with the principle of student activity sheets development using the Discovery Learning- 4) Development Learning Media meets the principles of development and Learning Media components requirements by applying Discovery Learning- 5) Learning Outcomes Tests developed meet the principles and requirements for developing learning Outcomes Tests- 6) The learning devices developed meet the criteria well and student achievement test show the percentage of completeness by 80%. Keywords: Learning Devices, Discovery Learning Share Link | Plain Format | Corresponding Author (Santi Maria Simarmata)

114	Mathematics Education	ABS-297
Emergency remote teaching experiences of mathematics education lectures to address COVID-19 pandemic N Sulistyani1*, B Utomo2, and Y D Kristanto3 Program Studi Pendidikan Matematika, Universitas Sanata Dharma, Yogyakarta, Indonesia Abstract The Covid-19 pandemic has had an impact on change in various fields, including in higher education. This study provides an overview of the survey result of the experience of 14 lecturers of the Mathematics Education Study Program at the University of Sanata Dharma towards learning in responding to Pandemic Covid-19. The intended experience includes the strategies and technologies used in learning, learning success in terms of the achievement of objectives and student involvement, and planning for future learning. The results showed that (1) all lecturers conducted distance learning by utilizing various kinds of technology both synchronous and asynchronous as a form of learning adjustment to face a pandemic. (2) Although there is an adjustment in learning, most mathematics learning can run according to learning achievements. (3) The Mathematics Education lecturer will implement an improvement in learning that must be carried out online. The improvement is in the form of preparation and planning of learning, the use of more varied technologies, the use of more innovative methods of delivering material, adjustment of learning in terms of learning achievement and evaluation while still focusing on developing student experience. Keywords: Emergency remote teaching ,mathematics education lectures,COVID-19 pandemic Share Link | Plain Format | Corresponding Author (Niluh Sulistyani)

115	Mathematics Education	ABS-298
Students^ mathematical self-efficacy abilities in solving mathematical problems Rosida Marasabessy Universitas Pendidikan Indonesia Abstract Abstract This article aims to examine how the ability of self-efficacy helps students solve mathematical problems. The researchers examines several findings related to the ability of self- efficacy in research journals. The method used is literature study. Journal studies are carried out by searching and gathering literature studies with the keyword improvement in mathematical problem-solving abilities and self-efficacy using learning models, the relationship of problem-solving abilities with student self-efficacy, analysis of problem-solving abilities and self-efficacy and learning strategies to improve problem-solving abilities and self-efficacy on Google Scholar and Indonesian Journal Website. The researcher examines ideas, opinions, or findings contained in literacy so as to provide theoretical information related to the ability of self-efficacy in solving mathematical problems. The articles reviewed were 23 articles. The finding shows that there are four main sources that influence one^s self-efficacy in solving problems, namely the experience of solving problems, the experiences of others, verbal persuasion, and psychological conditions. Meanwhile, the factors that cause the high and low self-efficacy of a person are gender, age, level of education and experience. Keywords: self-efficacy, problem-solving ability, mathematics Share Link | Plain Format | Corresponding Author (Rosida Marasabessy)

116	Mathematics Education	ABS-43
TRANSPOSITION OF A SPHERE^S VOLUME BASED ON DIDACTIC PHENOMENA Entit Puspita, Turmudi, Rizky Rosjanuardi Universitas Pendidikan Indonesia Abstract Concerns about mathematics learning are rarely associated with life contexts, giving ideas to teachers and researchers developing didactic phenomenon-based learning. Didactic phenomenology is defined as a bridge to study mathematical concepts. Unfortunately, the use of didactic phenomena still leaves problems when formalizing the idea, including the concept of spherical volume. The qualitative method was chosen with a didactic phenomenological design, to explore the transposition of spherical volume construction, to strengthen the results of didactic phenomena based learning. By utilizing didactic phenomena and assuming students know the surface area of the sphere informally, the sphere volume can show. Formally with the concept of the volume of a rotating object and double integrals can be proven the volume of the sphere. With the idea of vector and limit the surface area and volume of the sphere can be determined as students know it. Further studies need to do regarding research collaboration mechanisms that involve teachers and academics so that the efforts of teachers in utilizing various didactic phenomena have a foundation of thinking that can be scientifically justified Keywords: didactic phenomena, transposition, spherical volume Share Link | Plain Format | Corresponding Author (Entit Puspita)

117	Mathematics Education	ABS-301
Analysis of Mathematical Representation Ability of Grade VIII Junior High School Students Ahlaini Ulyah, and Siti Fatimah Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia *ahlaini[at]upi.edu Abstract This study aims to describe the mathematical representation ability of eighth grade junior high school students. This type of research is a qualitative descriptive study that focuses on three indicators namely visual representation, verbal representation and symbolic representation. The data collection technique used a test in the form of a description of the questions conducted to the eighth grade students of SMP Negeri in Kampar for 30 students. The results showed the students^ mathematical representation ability was low. Most students find it difficult to make drawings from the known. Based on these findings learning activities must be developed to achieve the expected indicators so that students^ mathematical representation abilities can be improved. Keywords: mathematical representation ability Share Link | Plain Format | Corresponding Author (Ahlaini Ulyah)

118	Mathematics Education	ABS-47
Error type analysis based on Newman^s theory in solving mathematical communication ability questions of junior high school students on the material of polyhedron Mia Audina Musyadad (a*) and Bambang Avip Priatna Martadiputra (b) a) Sekolah Pasca Sarjana Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia *miaaudinamusyadad[at]upi.edu b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia Abstract This study aims to analyze students^ mistakes in doing mathematical communication ability on polyhedron Newman error indicators. This research used a qualitative approach with a case study method. The subjects of the study were the eighth grade students of SMPN in Bandung in the 2019/2020 school year. The research instrument was a test that was analyzed using the Newman error indicator. Based on the results of data analysis, it was known that the average mathematical communication ability of students were still low. The indications were: (1) 8.3% of students misread questions (do not know the meaning of the questions)- (2) 13.3% of students misunderstood the questions for (did not know what to look for)- (3) 30.0% of students incorrectly transformed questions (could not form the generating function of the questions)- (4) 18.3% of students did not have process ability (errors in calculations)- and (5) 21.7% of students mistakenly wrote the final answer (error writing the final answer to the problem). Keywords: error type, mathematical communication ability, Newman error indicators Share Link | Plain Format | Corresponding Author (Mia Audina Musyadad)

119	Mathematics Education	ABS-303
The Effect of Using Group Investigation Learning Model and Prior Knowledge toward Student Problem Solving Skills on Mathematics Subject at Junior High School. V Angriani, Darto, and M Zein 1 Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia-budi No. 229, Bandung 40154, Indonesia 2,3 Departemen Pendidikan Matematika, Universitas Islam negeri Sultan Syarif Kasim Riau, Jl. HR. Soebrantas Panam Km. 15 No. 155, Riau 28293, Indonesia Abstract Towards the 21st century, technological and social change has developed rapidly. Educational practices must develop as well over time. The role and function of mathematics becomes an inevitable need. In order to meet the needs in adapting to these changes, problem solving is one of the mandatory skills that must be mastered by students. Problem solving skills are influenced by several factors, including learning models and student abilities. Therefore, this article aims at investigating whether a difference in mathematical problem solving skills emerges between the students involved in the learning group investigation learning model and those in the direct learning model, according to the high, medium, and low initial skills of 8th grade students of a junior high school (SMP) in Pekanbaru. The quasi-experimental method was used in the study. Based on the t-test analysis, the use of group investigation learning model in terms of initial skills, in general, influences the students^ mathematical problem solving skills. Keywords: Group Investigation Learning Model, Initial Ability, and Problem Solving Ability Share Link | Plain Format | Corresponding Author (Vivi Angriani)

120	Mathematics Education	ABS-48
The Effect of Contextual Learning Approaches on Students Mathematical Beliefs in Junior High School Nirfayanti, Abdul Wahid, Nur Afni, Indah Rospita Sari Mahasiswa PPs Ilmu Pendidikan Universitas Negeri Makassar Abstract In mathematics learning there are affective aspects that students must have. One of them is the students beliefs in themselves to solve the problems faced in learning mathematics. This research aim to obtain a description of the effect of the application of contextual learning approaches to mathematical beliefs of grade VII students in one of the junior high schools in Maros district, South Sulawesi province. The research adopted quantitative research and employed quasi experiment which is non-equivalent control group design. The sample of this research were 28 students of class VII.A as an experimental class and class VII.B as a control class. Data collection uses a questionnaire of 25 items to measure students beliefs in themselves in solving mathematical problems. Data were analyzed descriptively and inferentially. Testing the hypothesis in this research using an independent sample t-test. The results showed that contextual learning applied in the experimental class could significantly influence students mathematical beliefs on rectangular flat figure material. This can be seen from the average score of mathematical beliefs in the experimental class students is higher than the control class. Thus the application of this contextual learning approach affects the mathematical beliefs of students. Keywords: contextual approach, beliefs mathematical Share Link | Plain Format | Corresponding Author (Nirfayanti Nirfayanti)

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