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271	Mathematics Education	ABS-378
Mathematical Representation Ability in Reading ^Cacarakan Script^ as a Pattern of Integer Count Operations Rineka Rosinansis (a*), Aan Hasanah (b) a) Mathematic Education Postgraduate, Faculty of Mathematics and Natural Sciences Education, University of Pendidikan Indonesia Jl. Dr. Setiabudi No. 229, Kota Bandung, Jawa Barat 40154, Indonesia *rineka.math[at]upi.edu b) Department of Mathematics Education, Faculty of Mathematics and Natural Sciences Education, University of Pendidikan Indonesia Jl. Dr. Setiabudi No. 229, Kota Bandung, Jawa Barat 40154, Indonesia Abstract Motivated by the low motivation to learn mathematics which results in the low achievement of basic competencies and the quality of students understanding in learning mathematics, the innovation of learning approaches that are needed that suits the needs of students. Ethnomathematics shorts were chosen to stimulate students activism in learning mathematics, by involving culture as a pearl of local wisdom raised to prove the correlation between mathematics and real-life that students can encounter in the richness of culture in the environment students. The media used is the ^cacarakan^ script to match the couple who are still used as a trust of the local community. The methods used in this study are qualitative ethnography and a gradually advanced research flow. Data collection techniques used include observation, questionnaires, interviews, and documentation. The subject used in this study is MTs Nurul Hikmah Cupunagara class VII student year 2021/2022 semester 1. The next subject is cultural actors who can provide in-depth information about the cultural potential of the local area. The results of the study concluded that (1) there are various cultural potentials as local wisdom owned by Cupunagara Village, one of which is the calculation of ^elmu palak^ regarding the calculation of the match of couples using ^cacarakan^ script, which has relevance to mathematics, especially in class VII number material- (2) students can represent mathematics in a cultural context through ^cacarakan^ script on the material of numbers- (3) students can solve problems related to integer counting operations- (4) learning mathematics using ethnomathematics approaches based on local wisdom has been shown to affect the motivation of learning mathematics students for the better. Keywords: mathematical representation- ^cacarakan^ script- integers- ethnomathematics Share Link | Plain Format | Corresponding Author (Rineka Rosinansis)

272	Mathematics Education	ABS-123
THE INTERACTION EFFECT OF ANDROID MEDIA USE WITH THE STUDENTS^ INTEREST TOWARD LEARNING OUTCOME OF PROBABILITY MATERIALS Farid Gunadi (a*), Dadang Juandi (b) Universitas Pendidikan Indonesia Abstract Nowadays, the use of Android controls the system in the use of smartphones. The smartphone is not only used for personal purposes but also can be used in learning systems. One of the smartphone advantages is accessible anytime and anywhere. This advantage is distinct in the learning process. A teacher can develop a learning application accessible from students^ smartphones to motivate and improve their learning process. This research aims to know the Android media interaction effect with the students^ interest toward the learning outcome of Probability material. This research reported an interaction effect between the use of Android media with the students^ interest in the learning outcome of Probability material. In the class that used Android media, the students were more interested and motivated to read the material and do the exercise in the application created by the teacher. They also showed better learning outcomes in the Probability material Keywords: Android Media, Students^ Interest, Learning Outcome, Probability material Share Link | Plain Format | Corresponding Author (Farid Gunadi)

273	Mathematics Education	ABS-379
MATHEMATICS RELATIONS AS THE OBJECT OF CULTURAL STUDY IN THE DIMENSIONS OF PHILOSOPHY AND SCIENCE (STUDY ETHNOMATHEMATICS) Rineka Rosinansis (a*), Aan Hasanah (b) a) Mathematic Education, University of Pendidikan Indonesia *rineka.math[at]upi.edu b) Mathematic Education, University of Pendidikan Indonesia Abstract Ethnomathematics has a rich discussion because it has a broad perspective related to mathematics from a cultural point of view. Regional culture is one of the elements of the wealth of the archipelago, one of which is the undanese as the second-largest ethnic group after Java. Some of the traditional communities in the Sunda region are still closely related to the beliefs held and passed down from their ancestors. This study explores arithmetic used by the Sundanese people as a cultural heritage that can be used for activities in daily life and aims to determine the relationship of mathematics as an object of cultural studies from the point of view of philosophy and science, especially in the count of repok (calculation of match mate), and a good day to carry out the wedding. The method used in this study is an ethnographic method with a qualitative approach. The subjects used in this study were limited to one person using the purposive sampling technique. Data collection techniques using literature review, observation, interviews, and documentation. The results of the study conclude that in the calculation of repok there is an ethnomathematical relationship, namely mathematics as an object of cultural studies in the perspective of philosophy and science that has truth values and is believed. Keywords: elmu palak, ethnomathematics, philosophy, Sundanese Share Link | Plain Format | Corresponding Author (Rineka Rosinansis)

274	Mathematics Education	ABS-125
IMPROVEMENT OF MATHEMATIC REPRESENTATION ABILITY STUDENTS THROUGH PROBLEM BASED LEARNING HELP GEOGEBRA Erma Monariska Suryakancana University Abstract Mathematical representation ability is one of the abilities that students must have in building concepts and thinking mathematically. Therefore, an effort is needed that is able to accommodate mathematical representation abilities in order to develop optimally, namely a method that provides sufficient opportunities for students to be able to train and develop their mathematical representation abilities. A learning model that presents tasks in the form of problems because with a problem, students will try to find solutions with various ideas and representations so that students^ thinking abilities are truly optimized through the problem solving process. One suitable learning model is the Geogebra-assisted Problem Based Learning learning model. Through the Geogebra-assisted Problem Based Learning learning model, students are expected to be able to present information data back from a representation to diagrams, graphs, or tables- use visual representations to solve problems effectively- draw geometric patterns to clarify problems and facilitate resolution. The method used in this research is an experimental method with the research subject of level III students of the Mathematics Education Study Program, Suryakancana University in the Linear Program course. The data collection technique was carried out using a test instrument in the form of a student^s mathematical representation ability test and a non-test in the form of a student attitude scale questionnaire towards Geogebra assisted Problem Based Learning. Based on the results of the research, it is known that: 1) The improvement of students^ mathematical representation skills using geogebra-assisted problem based learning is better than students using ordinary learning- 2) Students have a positive attitude towards learning with Geogebra-assisted Problem Based Learning and mathematical representation questions Keywords: Geogebra-assisted Problem Based Learning, Mathematical Representation Share Link | Plain Format | Corresponding Author (Erma Monariska)

275	Mathematics Education	ABS-127
Development of Animation Video Learning Media Based on Two Variable Linear Equation Systems Erina Tetriyani, Asep Jihad, Tika Karlina Rachmawati, Hamdan Sugilar Department of Mathematics Education, UIN Sunan Gunung Djati Bandung Abstract This study aims to describe the process of developing a Powtoon-based animated video on a two-variable system of linear equations- analyzing the feasibility of animated video-based video media, and knowing student responses in the use of Powtoon-based animated videos. The research method used is Research and Development with the ADDIE development model (Analysis- Design, Development, Implementation, Evaluation). The research instruments used were interview sheets, material expert validation questionnaires, media experts and subject experts and student response questionnaires. Based on the results of the analysis, it can be concluded that the development of animation learning videos based on Powtoon is categorized as good with the percentage of material experts at 76% in the good category, media experts 59.5% in the fairly good category, and the last is subject matter experts with a percentage of 75%. Meanwhile, the average percentage of student response questionnaires is 76.1%, which means that students get a good response in the use of animated video based on Powtoon Keywords: Learning Video, mathematics learning media, Powtoon, Two Variable Linear Equation System Share Link | Plain Format | Corresponding Author (Hamdan Sugilar)

276	Mathematics Education	ABS-385
MATHEMATICAL COMMUNICATION ABILITY IN ONLINE LEARNING Azhar Majid Hidayat(a), Dadan Dasari(b), Dadang Juandi(c) a) Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung, Indonesia. azharmajidh[at]upi.edu b) Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung, Indonesia. dadan.dasari[at]upi.edu c)Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung, Indonesia. dadang.juandi[at]upi.edu Abstract Mathematical communication skills can be used as capital in mastering other abilities. Knowing the importance of mathematical communication skills, it is necessary to make efforts to optimize mathematical communication skills in order to achieve the desired competency standards of graduates. As an effort to improve mathematical communication skills, it must first be seen the factors that influence the less than optimal mathematical communication skills. This study uses a phenomenological research method and performs an analysis based on the results of tests and interviews. Based on the results of research on the mathematical communication skills of students in online learning 58% have a high category, so online learning is fairly smooth and students can adapt to changes from face-to-face learning to online learning. In addition, factors that affect students^ mathematical communication skills in online learning are: intelligence, interests, motivation and learning independently. Keywords: Mathematical Communication Skills, Online Learning, Phenomenology Share Link | Plain Format | Corresponding Author (Azhar Majid Hidayat)

277	Mathematics Education	ABS-136
Learning Obstacles of Junior High School Students in Computational Thinking on Number Pattern Lessons Dwi Fitriani Rosali (a*), Didi Suryadi (a), and Suhendra (a) (a) Department of Mathematics Education, Universitas Pendidikan Indonesia Jl. Dr. Setiabudhi No.229, Bandung 40154, Indonesia *dewirosali[at]upi.edu Abstract Computational thinking is one of the most important skills in solving mathematical problems. However, in fact there are still many students who do not have these abilities due to learning obstacles. This study was qualitative research with a phenomenological approach that aims to describe students^ learning obstacles in computational thinking on number pattern lesson including ontogenical obstacles, epistemological obstacles, and didactical obstacles. This study was conducted at one of the MTsN schools in Makassar, South Celebes and involved 74 students of grade 8th. From the 74 students, 12 students were selected to interview. The research instruments that were used were tests, questionnaires, and interview guidelines. The collected data was then analyzed with stages: data reduction, data presentation, and conclusion withdrawal. The results showed that there were learning obstacles experienced by students, namely (a) ontogenical obstacles that include instrumental ontogenical obstacle, psychological ontogenical obstacle, and conceptual ontogenical obstacle- (b) epistemological obstacle, in the form difficulties in doing either pattern recognition or abstraction and generalization because of limitations of the students^ context ability in solving the problem of number patterns- and (c) didactical obstacle, in the form of limitations of the learning of number pattern lesson, the learning does not involve the students in process of abstraction and generalization that make the material presentation become incomplete, and the learning does not emphasize on the students^ thinking process in abstraction and generalization process, and also less emphasize on problem decomposition and algoritmic thinking. From this research, the researcher recommend that the identified learning obstacles can be used as a consideration to develop a more optimal didactical design related to number pattern lesson by paying attention to the students^ characteristics. Keywords: learning obstacle, computational thinking, number pattern Share Link | Plain Format | Corresponding Author (Dwi Fitriani Rosali)

278	Mathematics Education	ABS-394
LEARNING MATHEMATICS USING AUTOGRAPH APPLICATIONS AS A TOOL FOR REVIEW BASED ON STUDENTS^ MATHEMATIC COMMUNICATION ABILITY Elfira Rahmadani(a,b*), Sahat Saragih(a), E.Elvis Napitupulu(a), KMS Amin Fauzi(a), Ely Syafitri(a,b), Syahriani Sirait(a,b), Anim(a,b) a) Postgraduate Program, State University of Medan Jl. William Iskandar Psr V, Medan, Indonesia b) Universitas Asahan Jl. Jendral Ahmad Yani, Kisaran, Indonesia *elfira.rahmadani3[at]gmail.com Abstract When it comes to math, students^ ability to communicate their ideas in a clear and concise manner is significantly higher when they use the autograph-assisted discovery learning model than when they use traditional methods. Quasi-Experimental Research was used in this study, which involved all students in MAN Asahan^s class XI. Random sampling and selective sampling are used to select class samples. Students^ mathematical communication abilities are assessed through the use of this instrument. Parametric statistical analysis was used to examine the study^s data. T-test analysis was used to conduct statistical analysis of the data. Students^ mathematical communication skills using the autograph-assisted discovery learning model were higher than students^ mathematical communication skills using conventional learning, according to the findings. Students in class XI IPA-1 who were taught Geometry Transformation using the discovery learning model had an average communication skill score of 79.56. Students in class XI IPA-2 who are being taught with traditional methods on Geometry Transformation material have an average mathematical communication ability of 70.98. Keywords: autographs, mathematical communication ability Share Link | Plain Format | Corresponding Author (Elfira Rahmadani)

279	Mathematics Education	ABS-397
ANALYSIS OF NON-MATHEMATICS STUDENTS^-TEACHER STATISTICAL REASONING Nayla Nafisa Ghassaniy Universitas Pendidikan Indonesia Abstract Both researchers and teachers as practitioners widely use statistics to intensify academic knowledge. So many universities require their students to take one statistics class leastwise as a graduation requirement. One of the goals of statistics class is to intensify the statistical reasoning ability of students. This study, therefore, aims to analyze the non-mathematics students^-teacher statistical reasoning. The researcher conducted a qualitative case study with three steps to investigate students^-teacher statistical reasoning. First, the researchers adopted the statistical reasoning task. Then tested 69 students from the fourth-semester student-teacher. Finally, the researcher analyzed students-teacher answers by classifying them based on statistical reasoning level. The results showed that students^ statistical reasoning is at the idiosyncratic, transitional, quantitative, and analytical levels, with the highest percentage at the idiosyncratic level. The conclusion was there needs to be an effort to improve the statistical reasoning of non-mathematics students-teacher. Keywords: Statistics, Mathematics, Mathematics education, Statistical reasoning Share Link | Plain Format | Corresponding Author (Nayla Nafisa Ghassaniy)

280	Mathematics Education	ABS-401
Computer Assisted-Discovery Learning (CA-DL) in Mathematics Learning Ginda Maruli Andi Siregar, Tatang Herman, Wahyudin, Sufyani Prabawanto Universitas Pendidikan Indonesia Abstract Since Bruner and Dewey (1960) introduced the discovery learning model has been used in learning at every level of education. In addition, Discovery Learning is also a concentration of mathematics education research by various educational practitioners. Along with social, cultural, and technological developments, discovery learning has undergone many developments. Various learning media that are adapted to assist discovery learning. Technological developments have a great influence on Discovery Learning, which is realized through the change of ^Hands-on media^ into digital media. This study aims to analyze the effects of computer-assisted discovery learning. The method used is meta-analysis. Data obtained from previous research, scientific publication articles. The data analysis technique uses effect size values. The results of the analysis show that computer-assisted discovery learning has an effect size value of 0.813. This shows that the development of discovery learning, which is computer-assisted, has a great effect on mathematics learning when applied at various levels of education. Keywords: Mathematics Discovery learning, computer assisted learning, computer assisted-discovery lerning Share Link | Plain Format | Corresponding Author (Ginda Maruli Andi Siregar)

281	Mathematics Education	ABS-402
Spatial Ability in Learning Mathematics: Systematic Literature Review (SLR) Nasrul Naufal (a*), Dadang Juandi (b) (a) Department of Mathematics Education FPMIPA UPI Jalan Dr. Setiabudhi Nomor 229 Bandung 40154 *nasrulnaufal[at]upi.edu (b) Department of Mathematics Education FPMIPA UPI Jalan Dr. Setiabudhi Nomor 229 Bandung 40154 Abstract The factor that plays an important role in studying geometry was spatial ability. If it was related to the context of mathematics, especially geometry, it turns out that spatial abilities were very important to have and develop. Spatial ability was closely related to academic achievement, especially to understand mathematics and geometry. To find the latest facts related to spatial ability in learning mathematics, the researcher conducted a study using the Systematic Literature Review (SLR) method. A total of 18 accredited journal articles from various databases in the 2016-2021 period were summarized and interpreted to produce a review in the form of article data presented in a graph, including the year of publication, education level, a method used, sample size, and demography. Research on spatial abilities in mathematics learning has received good attention, but the number of studies on spatial abilities in mathematics learning in the last two years was decreased. In addition, spatial abilities in early childhood have not been optimized, this is disappointing because spatial abilities are closely related to children^s cognitive aspects. This literature review recommends conducting research on spatial abilities in various provinces in Indonesia, considering the importance of high spatial abilities for good mathematical performance. Keywords: Spatial ability- Geometry- Systematic Literature Review (SLR) Share Link | Plain Format | Corresponding Author (Nasrul Naufal)

282	Mathematics Education	ABS-406
The Influence of the Use of Group Investigation Cooperative Learning Model on Students^ Mathematical Problem Solving Ability (Research in Class VII SMPN 1 Singaparna 2010/2011). Wida Wahyuni(a*),Edi Hidayat(b) a) Siliwangi University jalan Tasikmalaya, Indonesia b)Mathematics Education Study Program. Faculty of Teacher Training and Education. Abstract In an effort to improve problem solving, teachers must use appropriate learning models and in accordance with educational provisions that are innovative and creative. In general, teachers use the easiest and most practical way for themselves in learning. In learning, students are not familiar with non-routine questions, so that the problem solving abilities of students are not optimal. The purpose of this study was to determine the ability to solve mathematical problems using the group investigation model and direct learning model. The research method used is the experimental method. The data collection technique in this study was to carry out a mathematical problem solving ability test which was carried out 2 times. The research instrument used is a matter of ability test mathematical problem solving each as many as 4 questions in the form of a description. The population in this study were 289 students of class VII SMP. Sampling was carried out randomly. The sample was class VII D as the experimental class using group investigation and VII G as the control class using direct learning. The data analysis technique used the difference test of two averages. Based on the results of hypothesis testing, the results of students^ mathematical problem solving using the group investigation type cooperative learning model are better than direct learning. Keywords: group investigation,problem solving ,cooperative learning Share Link | Plain Format | Corresponding Author (WIDA WAHYUNI)

283	Mathematics Education	ABS-407
THE DIFFERENCES OF STUDENT^S MATHEMATIC LITERATURE ABILITY WITH ASSISTED LEARNING BY HYPERCONTENT OF ETHNOMATHEMATICS FOR MATHEMATICAL LITERACY Ahmad Isnaini, Sahat Saragih, Elmanani Simamora State University of Medan Abstract This study aims to determine the increase in students^ mathematical literacy skills when taught using technology, which is assisted by Hypercontent of Ethnomathematics for Mathematical Literacy (HEML). Students need to have mathematical literacy skills to be able to formulate, use, and interpret mathematical knowledge in various contexts of real-world problems. This research is quasi-experimental and was conducted at SMA Dr. Wahidin Sudirohusodo Medan with a population of class X students at SMA Dr. Wahidin Sudirohusodo. The results obtained that the average increase in students^ mathematical literacy skills in the experimental class was higher than the average increase in students^ mathematical literacy abilities in the control class. The research data are normally distributed and have the same or homogeneous variance. Meanwhile, the t-test results, results show that the average mathematical literacy ability with Hypercontent of Ethnomathematics for Mathematical Literacy-assisted learning is different from the average mathematical literacy ability with conventional learning. Keywords: Mathematical Literacy, Technologi, HEML Share Link | Plain Format | Corresponding Author (Ahmad Isnaini)

284	Mathematics Education	ABS-412
IMPROVING STUDENT^S ADVERSITY QUOTIENT USING AUTOGRAPH LEARNING MEDIA Ely Syafitri (a*), Sahat Saragih2 (b), E. Elvis Napitupulu (c), KMS. Muhammad Amin Fauzi (d), Anim (e) Elfira Rahmadani (f), Syahriani Sirait (g), Ismail hanif batubara (h) (a, b, c, d, e, f, g, h) Postgraduate Program, State University of Medan Jl. William Iskandar Psr V, Medan, Indonesia (a, e, f, g) Faculty of Teacher Training and Education, University of Asahan Jl. Jendral Ahmad Yani, Kisaran, Indonesia (h) University of Muhammadiyah Sumatera Utara Jl. Kapten Muchtar Basri No.3, Indonesia *ely.syafitri1[at]gmail.com Abstract This study aims to determine the difference in adversity quotient between students who learn to use the Autograph learning media and students who receive conventional learning. The problem in this study is ^Is there a difference between the adversity quotient of students who learn to use Autograph learning media and students who receive conventional learning?^. This research is quasi-experimental, where the teacher plays a direct role in the learning process, and the researcher acts as an observer. The subjects in this study were students of class VIII MTs Al-Arifin Rahuning totalling 100 people, and a sample of class VIII-1 totalling 28 people. At the same time, the object of this research is the adversity quotient of students towards learning mathematics and collecting data in this study using observation sheets and adversity quotient. The results of this study were carried out using the t-test to determine whether or not there were differences in the adversity quotient of students towards learning mathematics. Based on the results of the data analysis carried out, it was concluded that there was a difference in the adversity quotient between students who learned to use the Autograph learning media and students who received conventional learning with a tcount= 8.29 greater than ttable at the 5% significance level and significant 1% of 2.14 and 2.96. Keywords: Keywords: Autograph, Adversity Quotient, Mathematic education Share Link | Plain Format | Corresponding Author (Ely Syafitri)

285	Mathematics Education	ABS-415
Distance Learning Model of Mathematics During the Pandemic of Covid-19 in Madrasah Ibtidaiyah Laely Farokhah(1,2), Tatang Herman(3), Fatma Nurmulia (2), Zaenal Abidin(4), Muhammad Zulfadhli (5) 1)Pendidikan Dasar, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung 40154, Indonesia 2)Pendidikan Guru Madrasah Ibtidaiyah, Fakultas Agama Islam, Universitas Muhammadiyah Jakarta, Jl. K.H. Ahmad Dahlan, Ciputat, Jakarta Selatan, Indonesia 3)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung 40154, Indonesia 4)Pendidikan Guru Sekolah Dasar, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Muhammadiyah Surakarta, Jl. A. Yani Tromol, Mendungan, Pabelan, Kec. Kartasura, Kabupaten Sukoharjo, Jawa Tengah 57162, Indonesia 5)Teknik Industri, Fakultas Teknik, Universitas Bhayangkara Jakarta Raya, Jl. Raya Perjuangan, Bekasi, Indonesia Abstract This research aims to analyze the distance learning model of mathematics in Madrasah Ibtidaiyah. The qualitative research using descriptive method was taken in this research. This research was conducted in one of Madrasah Ibtidaiyah located in South Tangerang city, Banten Province, Indonesia. The subjects were school principals, vice principals in the field of curriculum, and teachers who taught mathematics through online distance learning. The data collection used observation, interviews, and documentation. The data analysis consisted of four steps, involving data collection, data reduction, data display, and data conclusion. The results showed that the distance learning model of mathematics is mapped through several aspects, consisted of the preparation of an emergency curriculum during pandemic of Covid-19, the implementation of online distance learning procedures involving teachers, students, and parents, the selection of online distance learning methods and the use of various online learning media, the use of student books as learning resources, and the evaluation program of learning to measure the achievement of mathematics learning objectives. These results can be a reference to develop a distance learning model of mathematics that can be applied in Madrasah Ibtidaiyah during the pandemic of Covid-19. Keywords: distance learning, model, madrasah ibtidaiyah, covid-19 Share Link | Plain Format | Corresponding Author (Laely Farokhah)

286	Mathematics Education	ABS-160
Mobile-Based Geometry Learning Media Design Analysis for Junior High School Students Ambar Gini Permatasari (a) , Dr. Nurjanah, M.Pd (b) , Rian Andrian (c) (a) Mathematics Education, Indonesian University of Education (b) Mathematics Education, Indonesian Universitiy of Education (c) Information Technology Systems Education, Indonesian University of Education Abstract Nowadays, a lot of students find mathematics is a boring and difficult subject to follow. Geometry is one of fields of study in middle school mathematics which gets a larger portion to be studied by students at school compared to other materials such as algebra, numbers, statistics, and probability. This is due to many concepts contained in geometry and its abstract nature, so that in teaching geometry, teacher needs to plan it well so that it can be understood by students. However, geometry is still considered one of the most difficult materials for students to understand. The use of mobile-based learning media can be an alternative as a solution to make students more active in the learning process. Based on the above background, this research will analyze and design mobile-based geometry learning media for middle school students. The research will be carried out using the design thinking method to get the needs of the target user. Keywords: Learning media, Mobile Apps, Mathematics, Geometry Share Link | Plain Format | Corresponding Author (AMBAR GINI PERMATASARI)

287	Mathematics Education	ABS-416
Students^ Ontogenic and Epistemological Obstacles on the topic of Pyramid Volume Anisah Sita Mujahidah (a)*, Rizky Rosjanuardi (b) a) Program Studi Pendidikan Matematika, Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudhi 229, Bandung 40154, Indonesia. *anisahsm12[at]upi.edu b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudhi 229, Bandung 40154, Indonesia. rizky[at]upi.edu Abstract The concept of pyramids volume has been studied starting at the elementary school (SD) level and studied more deeply in junior high school (SMP). However, there are many students make mistakes in solving problems related to the volume of pyramids. This study aims to identify the ontogenic and epistemological obstacles of students in understanding the concept of pyramids volume. This research is a qualitative research using a Didactical Design Research (DDR). The participants of this study were 16 students of grade IX in Bandung who had studied the concept of pyramids volume. Data were obtained by analyzing respondents^ ability tests and interviews to solve problems related to the volume of pyramids. Characteristics of ontogenic and epistemological obstacles which were found about students^ knowledge in solving problems related to the concept of pyramids volume. The results showed that students experienced several ontogenic and epistemological obstacles which resulted in errors in problem solving. Keywords: Ontogenic Obstacle, Epistemological Obstacle, Pyramid Volume Share Link | Plain Format | Corresponding Author (Anisah Sita Mujahidah)

288	Mathematics Education	ABS-417
Development of Interactive Digital Module using Website Google Sites Siti Ambarwati SMK Negeri 8 Tebo Kabupaten Tebo, Jambi 37572, Indonesia sitiambarwati76[at]guru.smk.belajar.id Abstract This study aims to develop of interactive digital module using website google sites for mathematics learning at vocational high school. The research method used research and development (R&D) with the ADDIE development model that consists of five stages, namely Analyze, Design, Development, Implementation, and Evaluation. The results of this study show that interactive digital module using website google sites are suitable for use as learning media based on validation results by learning media experts, material experts, lecturers, teachers, and students. Keywords: Interactive Digital Module, Website Google Site Share Link | Plain Format | Corresponding Author (SITI AMBARWATI)

289	Mathematics Education	ABS-162
Analysis of the Mathematical Creative Thinking Ability of Prospective Teachers in Blended Learning Model with LMS Moodle Dahlia Fisher (a*), Anik Yuliani (b) a) Faculty of Teacher Training and Education, Unpas Jalan Taman Sari 6-8 Bandung 40116, Indonesia b) Faculty of Teacher Training and Education, IKIP Siliwangi Jl. Terusan Jend. Sudirman, Baros, Cimahi 40521, Indonesia Abstract The use of an inappropriate learning model has an impact on the law mathematical creative thinking ability of prospective teachers. Therefore, the right learning model is a blended learning model through LMS Moodle. This model can improve mathematical creative thinking skills. The purpose of this study is to determine how the mathematical creative thinking ability of prospective teachers in blended learning models through LMS Moodle. The method used is qualitative research with the type of literature study research. The literature study uses written sources from articles and other relevant written documents. Data collection techniques used are Editing, Organizing, and Finding. The data analysis using deductive, inductive, and interpretive. The background of the research is the low creative thinking ability of prospective teachers. The data sources used in this study are primary data and secondary data about mathematical creative thinking skills and blended learning models through LMS Moodle. The results of this study are the achievement and improvement of the mathematical creative thinking skills of prospective teachers using the blended learning model through LMS Moodle. Keywords: Mathematical Creative Thinking Ability, Prospective Teachers, Blended learning, LMS Moodle Share Link | Plain Format | Corresponding Author (Dahlia Fisher)

290	Mathematics Education	ABS-418
Information Literacy of Postgraduate Students in Online Learning M. Akbar Gulvara(a*), Abdul Rasyid Fakhrun Gani(b) a) Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229 Bandung, Indonesia *akbargulvara23[at]gmail.com b) Biology Education, Universitas Negeri Malang, Jl. Semarang No.5 Malang, Indonesia Abstract This study aims to determine the tendency of students information literacy in finding and retrieving information, sources of information, and using information. The population in this study were students of the Postgraduate Mathematics Education Study Program at the University of Indonesia Education (UPI) class of 2021-2022, the sample was taken as many as 30 students using convenience sampling technique. This research is included in qualitative research with data collection techniques in the form of questionnaires distributed using google form. The data was processed descriptively qualitatively by means of data reduction, data presentation and drawing conclusions. The results of this study indicate that 72.16% of students are able to search for information well, 69.49% of students are able to manage information well, and the most widely used sources of information by UPI Mathematics Education Masters students are online journals, printed books, and digital libraries. The conclusion in this study is that students already have information literacy during online learning in the 2021/2022 school year, but still need to improve the quality of learning to maximize students use and management of information. Keywords: Information literacy, literature study Share Link | Plain Format | Corresponding Author (M. Akbar Gulvara)

291	Mathematics Education	ABS-421
Students^ Mathematical Communication Ability Uyan Ahmad Satibi (a*), Bambang Avip Priatna (b) a) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia Abstract Mathematical communication ability is an important part of mathematics that need to be mastered by students because communication can help students explain their ideas and understanding of mathematics well. However, students^ mathematical communication ability is still in the low category. This research can be used as a reference for future researchers. The purpose of this study is to describe mathematical communication ability, starting from the understanding, indicators, and aspects that influence them. The method used in this study is a systematic literature review. The results of this study are as follows: (1) Mathematical communication ability includes oral and written communication. Oral communication is in the form of explanations and discussions, while written communication is in the form of expressing mathematical ideas through equations, tables, pictures, graphs, or students^ language. (2) indicators of mathematical communication ability: mathematical expression, written text, drawing. (3) Aspects that affect communication ability in mathematics include learning styles, personality, gender differences, intrapersonal intelligence, self-esteem, self-concept, and numerical and spatial abilities Keywords: Mathematical Communication Ability- Mathematics Share Link | Plain Format | Corresponding Author (Uyan Ahmad Satibi)

292	Mathematics Education	ABS-167
Development of Contextualized Instructional Manipulative for Probability Frankie A. Fran (a,b*) a) School of Science and Engineering, Ateneo de Manila University, Quezon City, 1105, Philippines b) College of Education, Romblon State University, Odiongan, Romblon, 5505, Philippines *frankie.fran[at]obf.ateneo.edu Abstract This study focused on developing and formatively evaluating an instructional material specifically designed to assist mathematics educators in discussing the least mastered competencies as reflected in the baseline data from students and mathematics teachers. It was found that both find Statistics and Probability as the most challenging content area. Moreover, teachers suggested that instructional material be developed to assist them in teaching this field. This served as the basis of the development of Frankards, a manipulative designed to aid teachers in teaching probability concepts. The development research method and Curriculum Development Model were utilized and adopted. Additionally, it was anchored on Experiential Realism and Dual Coding Theory. Frankards was formatively evaluated by mathematics teachers from various schools in the division. Using the Evaluation Rating Sheet for Manipulative prescribed by the Department of Education, the material was formatively evaluated based on Factor A (Contents), Factor B (Other Findings), and Factor C (Additional Requirement for Manipulative), which earned 38.44, 16 and 23.36, respectively. Furthermore, the evaluators rated Frankards with a rating of Very Satisfactory in Factor A= 3.84 and Factor B = 3.84. It was also found that there is no presence of errors based on Factor B. They have suggested some revisions regarding the size and visual appeal. Consequently, the material was revised based on this evaluation. Based on the findings, Frankards has satisfied the given criteria for evaluation. Evaluators have suggested that Frankards can be submitted for copyright and distributed for utilization of the teachers once its effectiveness is tested. Keywords: Educational Technology- Instructional Material- Mathematics Education- Probability and Statistics Share Link | Plain Format | Corresponding Author (Frankie Aspira Fran)

293	Mathematics Education	ABS-172
Mathematical Concept Understanding Through Learning Google Meet and Geo-Gebra Application Nina Lisnawati (*), Rahayu Kariadinata, Yayu Nurhayati Rahayu Mathematics Education Department, UIN Sunan Gunung Djati Bandung, Indonesia *ninalisnawati359[at]gmail.com Abstract Concept understanding is very important to be instilled in students, because the ability to understand concepts becomes the basis for students to think and solve problems correctly and precisely. Students experience difficulties in learning and understanding mathematical concepts, especially when the material provided is changed to different problems. The purpose of this paper is to identify students understanding of mathematical concepts during learning google meet assisted by the geogebra application. This study uses a quasi-experimental method with sampling using simple random sampling technique. The selected sample is class XI MIA 5 as the experimental class, while XI MIA 3 as the conventional class. The instrument used is the Early Knowledge of Mathematics test, a test of the ability to understand mathematical concepts. This shows that there is an increase in students mathematical concept understanding ability between the experimental class and the conventional class. Learning mathematics through google meet assisted by the geogebra application provides opportunities for students to be able to actively participate in mathematics learning activities through graphic visualization media, foster interest, enthusiasm, and can motivate students to improve students^ understanding of mathematical concepts. Keywords: Google Meet Learning, Mathematical Concepts Understanding, Geo-Gebra Applications Share Link | Plain Format | Corresponding Author (Nina Lisnawati)

294	Mathematics Education	ABS-431
Level of Students Geometry Thinking on quadrilateral topic M E Nggaba, Y S Eko, Irna N Sanit Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Wira Wacana Sumba Abstract Quadrilateral is one of the geometry topics in the curriculum and must be understood by students of junior high school. Therefore, to identify and describe students^ geometric thinking level, research was conducted on 40 students (11/13 years) in Kambera District, East Sumba Regency, East Nusa Tenggara. This research is descriptive qualitative research with data collection techniques is a written test for the quadrilateral case. The data were analyzed using van Hiele^s theory. The results showed that 1) only one-third of the number of students are at level 0 (visualization) i.e., students knew geometric pictures by observing the pictures or models. At this level, half of the students still make mistakes in classifying the types of quadrilaterals, and 2) only a few students are at level 1 which is able to understand or know the properties of quadrilaterals. From the written results, it was found that almost all students did not understand the topic of quadrilaterals and their properties well. We conclude that almost all students have not been able to recognize and classify the types of quadrilaterals well. Keywords: van Hiele theory, Geometric Thinking Level, Quadrilaterals Share Link | Plain Format | Corresponding Author (Mayun E NGGABA)

295	Mathematics Education	ABS-435
IMPLEMENTING WORDWALL APPLICATION IN TEACHING SAMPLING TECHNIQUES FOR HIGHER EDUCATION STUDENTS Tanti Listiani Mathematics Education, Universitas Pelita Harapan MH Thamrin Boulevard 1100, Klp. Dua, Kec. Klp. Dua, Kota Tangerang, Banten 15811 *tanti.listiani[at]uph.edu Abstract This research aimed to determine the use of the wordwall application in online learning on sampling techniques material for higher education students. The use of wordwall in learning activity was reviewed through test results and the questionnaire. This research used combination research by combining quantitative and qualitative data collection techniques. The subjects of this research were 53 students from Teachers College UPH that took Statistics for Research Education subject. The result displayed that quizzes given by the wordwall application can help students learn about sampling techniques materials with positive responses. Good feedback from students showed that they felt happy when do the learning activity by wordwall, There were almost 90% of students said that they enjoyed the learning. The end, the wordwall application is recommended to be implemented in higher education classrooms. Keywords: Wordwalll-Sampling Techniques-higher education students Share Link | Plain Format | Corresponding Author (Tanti Listiani)

296	Mathematics Education	ABS-436
Ethnomatematics: Exploring Mathematical Concepts and Philosophical Value in Trusmi Batik Cirebon Diana Ayu Wulandari (a*), Yaya Sukjaya Kusumah (b) Universitas Pendidikan Indonesia Abstract Mathematics in culture is known as ethnomatematics. The culture in the society is somehow always associated with mathematical elements. One of the infamous cultures in Indonesia is Batik, and in Cirebon, West Java, there is batik central called Batik Trusmi Khas Cirebon. There are two kinds of Batik, the first one is Batik Tulis (the written one) and the other one is Batik Cap (the stamped one). In term of Batik Cirebon, it has two patterns, the first one is Keratonan pattern such as macan ali, lasem, kawung, and liris, and the second pattern is Pesisiran pattern such as batik puger and mega mendung. The purpose of this study is to desribe the philosophical values and to reveal the mathematical concepts in doing batik activities. This research used qualitative method, so the instrument of this research is this research itself through the sources related to activities, perpetrators, and places and the data were collected through observation, unstructured interviews, triangulation, and field notes. The author used three methods in analyzing this research, there are reducting the data, presenting the data, and drawing the conclusion. Through this research, it can be concluded that Batik Trusmi Khas Cirebon has philosophical values that contained in every patterns about life, ethics, morals, also belief to God such as in Mega Mendung, Liris, Kawung, Macan Ali, Lasem, Puger, and Pohon-Pohon and mathematical concepts such as measuring the process of making batik using standard and non-standard sizes, comparision in Batik Tulis and Batik Cap, mathematical models, mathematical elements, geometric transformation, and graph theory. Keywords: Batik Trusmi, Ethnomatematics, Qualitative, Ethnograph Share Link | Plain Format | Corresponding Author (Diana Ayu Wulandari)

297	Mathematics Education	ABS-438
Analyzing of Students^ Learning Obstacle on Three Dimensional Topic Sukri (a*), Sufyani Prabawanto (b), Dian Usdiyana (b) a) Departement of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung 40154, Indonesia b) PUI-PT PUSBANGDDRINDO,Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia Abstract This research was a preliminary study to analyze senior high school mathematics books on three dimensional topic based on the anthropological theory of didactic. This study aims to identify the learning obstacle experienced by students on the distance between two points and the distance from a point to the line in three dimensional topics. The method used was a qualitative with case study design. The data was obtained by triangulation, namely result of students^ test dealing with the topic, interviews, and students^ documentation. The subject of the research were 32 students of 12th grade and a teacher at one of Senior High Schools in Tolitoli, Central Sulawesi. The finding of the research are that there are three types of students^ learning obstacles, namely ontogenic, epistemological, and didactical obstacles. In the case of ontogenic obstacle, it finds that students are lack of pre-requisite knowledge of the topic. In the case of the epistemological obstacle, students tend to memorize the definitions and formulas of phytagoras in limited context. Finally, in the case of the didactical obstacle, students have obstacle due to teaching process that tends to ignore students^ learning experience. Implication of this research finding is teaching three dimensional topic should be arranged based on the needs that consider the analysis of student^s learning obstacles to achieve learning objectives. Keywords: learning obstacles- Geometry- Three dimentional Share Link | Plain Format | Corresponding Author (Sukri Sukri)

298	Mathematics Education	ABS-447
Development of Student Worksheet Geometry Improve Students^Problem Solving Ability Dewi Rawani (a) ,Ratu Ilma Indra Putri (b*) ,Zulkardi (b),Ely Susanti (b) a)Universitas Tridinanti Palembang, Palembang, Indonesia b)Universitas Sriwijaya, Palembang, Indonesia Abstract This research aims to produce student worksheets through PMRI approach a valid and practical using traditional dance to improve students^problem solving ability. The subject were IX.3 student of Junior High School 1 Palembang. This study was design research of development study in which had two stages: the preliminary and formative evaluation. The formative evaluation includes self-evaluation, one-to-one, and expert review, small group and field test. The data were collected through a walkthrough, interview, and test. The context is South Sumatera^s traditional dance. The result of the analysis show that the problems which were reviewed by three expert review by focus group disscusion are valid- it is also practical and easy to understand the problem. Beside that show that student^s worksheet was effective to increase the problem solving ability of students. It appears that students can analyzing situations problem and illustrating results Keywords: Worksheet, Geometry, Design Research, South Sumatera Traditional Dance Share Link | Plain Format | Corresponding Author (Dewi Rawani)

299	Mathematics Education	ABS-448
Analysis of Student Errors in solving Functions and Inverse Functions Problem Milla Aldona Efendi (a*), Turmudi(b) (a)Universitas Pendidikan Indonesia * millaaldona[at]upi.edu (b) Universitas Pendidikan Indonesia Abstract In learning mathematics, students often make mistakes or omissions in solving the questions given both the questions of practice, assignments, tests, and exams. This resarch purposes to determine the student^s errors mistakes in solving mathematical problems in the functions and inverse functions in SMA Negeri in Jakarta. The method used is qualitative research, This qualitative research includes case study research, with research subjects X MIPA students totaling 30 people who were selected based on purposive sampling technique where this subject is a subject who gets the material Functions and Inverse Functions. Data collection procedures are taken through the provision of test questions and interviews whit students. Data analysis includes data reduction, data presentation, and conclusions. Based on the results of the written test, several student errors were found on the subject of functions and inverse functions, while in student interviews the causes of student errors were found. Keywords: Errors, Errors in Functions and Inverse Functions, Functions and Inverse Functions Share Link | Plain Format | Corresponding Author (Milla Aldona Efendi)

300	Mathematics Education	ABS-193
Improving Students^ Mathematical Representation Ability with e-learning modules using the kvisoft flipbook maker application Tria Widiani, T. Tutut Widiastuti A., Rahayu Kariadinata Mathematics Education Department, UIN Sunan Gunung Djati Bandung, Indonesia *widiastuti[at]uinsgd.ac.id Abstract This research is motivated by research to improve students^ mathematical representation skills which is supported by the results of a preliminary study of class VIII students at SMPN 2 Gununghalu, West Bandung Regency. With the development of science and technology, the steps that can be taken are to develop technology-based learning media, one of which is by using the Kvisoft Flipbook Maker application. The purpose of this study was to determine whether e-modules with the help of the kvisoft flipbook maker application could improve students^ mathematical representation skills. The method used in this research is the four-D (4D) research and development method which consists of 4 stages, namely the definition stage, the design stage, the development stage and the dissemination stage. Data collection techniques in this study were test and non-test. The findings obtained in this study were an increase in students^ mathematical representation abilities after learning using e-modules with the help of the kvisoft flipbook maker application, with the e-modules meeting the eligibility requirements in terms of validity, effectiveness and practicality in the learning process. Keywords: Mathematical Representation, E-module, Kvisoft Flipbook Maker Share Link | Plain Format | Corresponding Author (Tria Widiani)

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