Rully Charitas Indra Prahmana

Rully Charitas Indra Prahmana
  • Doctor of Education
  • Professor (Full) at Universitas Ahmad Dahlan

Lecturer and Researcher

About

217
Publications
367,398
Reads
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3,820
Citations
Introduction
Rully Charitas Indra Prahmana is a Professor in Mathematics Education Department at Universitas Ahmad Dahlan (UAD). His research interests lie in the Etnomathematics, Design Research, and Realistic Mathematics Education. [UAD Experts page: http://rully.mpmat.uad.ac.id/]
Current institution
Universitas Ahmad Dahlan
Current position
  • Professor (Full)
Additional affiliations
March 2012 - November 2016
STKIP Surya
Position
  • Senior Lecturer
Description
  • Lecturer and Researcher in Mathematics Education
August 2009 - April 2010
Muhammadiyah University of Makassar
Position
  • Lecturer
May 2008 - December 2008
LabMath-Indonesia
Position
  • Junior Researcher (Internship)
Education
July 2013 - August 2016
Universitas Pendidikan Indonesia
Field of study
  • Mathematics Education
May 2010 - January 2012
Sriwijaya University
Field of study
  • Mathematics Education
July 2004 - August 2008
Universitas Gadjah Mada
Field of study
  • Mathematics

Publications

Publications (217)
Article
Full-text available
Indonesia, particularly the Java region, is home to a wealth of folklore rich in moral teachings. Among these, the story of Rama and Sinta is one of the most prominent, and upon initial investigation, it reveals an underlying presence of mathematical concepts, particularly relations and functions. Despite this potential, there is a lack of research...
Chapter
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Pendahuluan Education 5.0 merepresentasikan sebuah transformasi mendasar dalam lanskap pendidikan dengan memanfaatkan teknologi digital canggih untuk menciptakan ekosistem pembelajaran yang berpusat pada peserta didik. Paradigma ini bertujuan untuk meningkatkan personalisasi metode pembelajaran, mendorong keterlibatan aktif peserta didik, serta men...
Article
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Recognising the pivotal role of effective teaching practices in enhancing student learning outcomes, the National Council of Teachers of Mathematics (NCTM) has outlined a comprehensive framework of key strategies. However, empirical research on these practices remains limited. Therefore, this study aimed to investigate the extent to which mathemati...
Article
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This study explores how junior high school students understand different types of discounts through percent multiplication. We used the qualitative study and analyzed the in-depth answers of three of the 32 participants as research subjects. The end-of-year discount selection activity provides a daily context to build knowledge about needs and want...
Article
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The teaching of mathematics in Indonesia faces notable challenges, particularly in effectively conveying mathematical concepts to students. This has created a need for instructional modules that provide better support for learners. Current modules, however, do not adequately incorporate the Pancasila Students Profile (PSP), especially in terms of f...
Chapter
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Abstrak: Sekolah umum seperti SD/MI, SMP/MTs dan SMA/MA/SMK memiliki keunggulan tersendiri sebagaimana pendidikan di pondok pesantren juga memiliki keunggulan tersendiri. Penelitian ini bertujuan mengetahui perbandingan tingkat capaian pendidikan antara peserta didik boarding school dengan non boarding (regular). Metode penelitian yang digunakan ad...
Article
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The integration of cultural and realistic contexts in mathematics learning has shown significant potential in fostering critical thinking skills; however, existing educational resources often lack a comprehensive approach that effectively combines these aspects. Addressing this gap, this research aimed to develop a novel Ethno-Realistic Mathematics...
Article
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In the 21st century, understanding variability and developing statistical investigation skills are crucial for enhancing students' data literacy. However, these essential skills are often overlooked, limiting students' growth in numeracy whereby statistical problems are frequently disconnected from real-world or cultural contexts, reducing student...
Article
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Recent research addressing the integration of cultural contexts with digital tools in mathematics education remains scarce. Previous studies have predominantly focused on traditional teaching methods, ethnomathematics, and implementing Realistic Mathematics Education (RME) as distinct approaches. However, this study bridges a critical gap by combin...
Article
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Despite the growing interest in contextualizing mathematics education, research integrating Qur’an contexts into mathematics instruction remains limited. Prior studies have largely concentrated on conventional teaching methods, Qur’an-centered instruction, or Problem-based Learning (PBL) as independent approaches. This study addresses a critical ga...
Article
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Numerous countries, including Indonesia, have integrated their cultural heritage into various aspects of society, notably in the realm of traditional textiles. With its diverse cultural landscape, Indonesia showcases detailed and comprehensive characteristics in its traditional fabrics, particularly the South Sumatra Songket. Popular cultural produ...
Article
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Mathematically gifted students have a potential for understanding and connecting mathematics concept. Pattern generalization as a part of functional thinking becomes one of the benchmarks for gifted students in mathematics. The mathematics curriculum in Indonesia that has not accommodated the functional thinking ability of elementary school student...
Article
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Mathematics education in Indonesia faces challenges primarily due to the limited problem-solving skills of students, prompting a need for effective teaching materials to enhance classroom learning. Despite this, many educators still rely on conventional methods that are less effective in fostering mathematical understanding. Consequently, there is...
Article
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This study presents some activities that integrate of computational thinking (CT) into mathematics lessons utilizing GeoGebra to promote constructionist learning. CT activities in Indonesian curriculum are dominated by worked examples with less plugged-mode activities that might hinder students from acquiring CT skills. Therefore, we developed mat...
Article
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The mission of positive psychology is to mitigate negative emotions while bolstering positive ones, thereby influencing student engagement in classroom learning activities, including mathematics. This study elucidates the Realistic Mathematics Education (RME) approach within the framework of Islamic teachings-specifically, inheritance law and chari...
Article
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The Program for International Student Assessment (PISA) 2022 study revealed low mathematical literacy scores among students, including those in inclusive education settings. A significant factor contributing to this issue is the inadequate capacity of teachers to effectively teach mathematical literacy. In response, this study aimed to design a mat...
Article
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Mathematical problem-solving ability is a critical skill required to meet the challenges of the 21st century, making it imperative for Indonesian students to master these skills. However, international assessments have consistently shown that Indonesian students' competencies, particularly in mathematical problem-solving, remain low. Research attri...
Article
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Ethnomathematics, an interdisciplinary field at the intersection of cultural studies and mathematics, examines the intricate mathematical practices found within diverse cultural settings. This research focuses on Rangku Alu, a traditional game from Indonesia, to explore its embedded mathematical elements. Using a qualitative ethnographic methodolog...
Article
Students encounter difficulties in solving areas of triangles and quadrilaterals due to a lack of conceptual understanding of the topic. The researchers have developed the following activities and the hypothetical learning trajectory (HLT) through the design research approach focusing on developing activities for students to learn the concepts prop...
Article
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Purpose-Boarding schools in Indonesia integrate Islamic religious education with general education, offering a comprehensive learning and living experience for students. This model is effective in character building, moral value reinforcement, tolerance promotion, social integrity, and responsibility, all while emphasizing knowledge and technology...
Conference Paper
Nowadays, various mosque architectural designs are beautiful, famous, iconic and contain philosophical values. Some experts have explored the characteristics and found that different architectural construction of mosques in some countries contains many mathematical elements or Ethnomathematics that can be used as a starting point for learning mathe...
Conference Paper
This paper aimed to describe the implications mathematics education in finance. Calculation of interest rates, discounts, profits, taxes, GDP growth requires basic arithmetic skills such as percentages. By imbuing financial literacy in math learning, not only do students know firsthand the use of percent in financial situations, but they are also i...
Article
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Current research indicates the presence of highly skilled and motivated students with robust computational thinking backgrounds seeking opportunities to leverage their expertise in driving innovation and success in this era. These studies also reveal that students' computational thinking skills vary widely depending on educational resources, curric...
Article
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In the rapidly advancing digital era, mathematics education must integrate various technological applications to support students' development for the 21st century. However, mere technological integration is insufficient; learning must also involve hands-on activities and real-life experiences to equip students with essential skills. Although many...
Article
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Indonesia's mathematical literacy levels remain low, as evidenced by its poor performance in PISA rankings over the past decade. One contributing factor is the students' unfamiliarity with PISA-type problems, which emphasize content, context, and process skills. The Siger Tower, an iconic landmark in Lampung, offers a multifaceted context encompass...
Article
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Foundational mathematical concepts like ratios and proportions are indispensable for solving both everyday problems and those encountered in professional settings. However, many students need help to grasp and apply these concepts effectively, often due to ineffective teaching methods, variations in students' levels of comprehension, and shortcomin...
Article
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Mathematical creative thinking skill often becomes the orientation of mathematics learning, aiming to enhance students' creativity in mathematics. Recognizing that creativity encompasses the capacity for thinking creatively and creativity disposition is essential. Building on this conceptual foundation, the primary objective of this study is to dev...
Article
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Several studies have highlighted the existence of demotivated teachers in schools. There are several demotivating factors that influence the decisions and commitment that a teacher can acquire. The literature review allows us to characterize the factors that different authors identify to explain teacher demotivation. This article aims to analyze so...
Conference Paper
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This study presents the development of integrated computational thinking in mathematics lessons. The lessons were intended to support students' computational thinking while learning mathematics. To do so, we used the educational design research (EDR) methodology to develop the lessons. We collaborated with mathematics teachers and practitioners to...
Article
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The study material on circle areas is contextually oriented and aids students in comprehending their surrounding environment. Higher-order thinking skills are imperative for the success of circular learning, as they help students grasp concepts holistically and solve concept problems. "What-if" questions can enhance students' higher-order thinking...
Article
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Triclustering is a data mining method for grouping data based on similar characteristics. The main purpose of a triclustering analysis is to obtain an optimal tricluster, which has a minimum mean square residue (MSR) and a maximum tricluster volume. The triclustering method has been developed using many approaches, such as an optimization method. I...
Book
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“Seni Merayu Editor Jurnal” merupakan karya nyata pengalaman penulis yang dapat dijadikan panduan dan referensi bagi para “Scopus dan WoS Hunter”, yang ingin lebih mengasah jiwa menulis artikel ilmiah, sehingga artikel yang disusun, kelak, bukan hanya dapat bertransformasi dari Good Paper menjadi Great Paper, tetapi lebih dapat memenuhi standar art...
Article
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The Brunei Woven Textiles are culturally significant artifacts in Brunei Darussalam, often used in traditional events such as Mandi Belawat and Hantaran Pernikahan. These textiles exhibit intricate motifs that incorporate mathematical concepts, a field known as ethnomathematics, offering a potential starting point for mathematics education. Despite...
Article
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Ethnomathematics represents a paradigm within mathematics education that centers on integrating and applying mathematical principles, concepts, and methodologies embedded within the cultural fabric of specific communities. Within the Indonesian cultural milieu, traditional games constitute a significant aspect. Hence, this study investigates the tr...
Article
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The purpose of this study was to develop valid and practical student worksheets (LKPD) based on Indonesian realistic mathematics education (PMRI) for junior high school students and to find out the potential effects of PMRI-based worksheets on the mathematical communication skills of SMP IT Abu Bakar Yogyakarta students. The type of research used i...
Article
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This descriptive quantitative study explored secondary school students’ reasons for receiving or not receiving private mathematics tutoring. It also explored the prevalent teaching methods private mathematics tutors use. A questionnaire was adapted to collect data from 1,309 Year 7 to Year 12 students (ages 11 to 17 years) in three countries: Brune...
Article
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Multiplication is the most difficult basic arithmetic operation and has been documented since 1980. Another multiplication difficulty dealing with story problems, they tend to assume that multiplication produces a larger result and the other way for division. Several studies show basic mathematics as one of the cognitive factors that affect the fin...
Article
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Nowadays, digital technologies are crucial in supporting students in geometry in secondary mathematics classrooms. However, in some cases, the role of visual function in technology was only utilized for seeing and conjecturing, not for experimenting, while to develop a relational understanding of geometry concepts, students should actively particip...
Article
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Mathematical communication is crucial in inclusive mathematics teaching and learning to convey mathematical symbols. However, teaching mathematical symbols to deaf students in inclusive classrooms has been a persistent challenge due to the lack of specialized sign language for mathematical expressions. Media, such as SPECOMATSO technology, can serv...
Article
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Penelitian ini bertujuan untuk menghasilkan soal matematika tipe PISA menggunakan konteks Tugu Yogyakarta yang valid, praktis, dan memiliki efek potensial terhadap kemampuan literasi matematika siswa. Metode penelitian yang digunakan dalam penelitian ini adalah design research tipe development studies, yang terdiri dari dua tahap: preliminary dan f...
Article
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Equations are often used in mathematics and other subjects, which means that a media can teach students how to solve equations, particularly linear equations of two variables, or Sistem Persamaan Linear Dua Variabel (SPLDV) as it is called in Indonesian, is needed. However, most teachers are still focused on developing the learning process and teac...
Article
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The low ability of students to understand and transform the concept of reflection to solve everyday problems is the main problem with learning mathematics because the implementation of learning mathematics is mechanical. Mathematics is taught by conveying formulas practically without linking them to students' daily activities. For this reason, this...
Article
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Mathematics, often viewed as abstract and detached from everyday life, has deep historical roots intertwined with societal phenomena. This study explores initiatives to connect mathematics with Indonesian cultural realities and perceptions. Specifically, it investigates uncovering historical values and mathematical set concepts embedded within the...
Article
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Due to the poor instruction process during the Covid-19 Pandemic, especially in mathematics, students frequently need help with data literacy. To overcome these obstacles, they must improve their thinking skills. This study aims to enhance the quality of mathematics instruction, especially students' thinking skills, by implementing Lesson Study to...
Article
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Applying critical thinking is an essential skill in the 21 st century. However, teaching materials that do not facilitate students to improve these skills impact the achievement of learning objectives. Therefore, educators need appropriate teaching materials that encourage students to enhance their thinking skills. This study aims to develop teachi...
Article
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Representation in mathematics is essential as a basis for students to be able to understand and apply mathematical ideas. This study aims to describe how students produce different representations in solving word problems. In solving word problems, students make verbal-written representations, image representations, and symbol representations. This...
Article
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The Likert scale is one of the essential rating scales used as a measurement tool in social sciences research, especially in the qualitative approach. Unfortunately, this scale has a great deal of controversy surrounding how data is obtained from Likert questionnaires and the appropriate statistical analysis of these data. A systematic review was p...
Article
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In implementing Ethnomathematics-Realistic Mathematics Education (Ethno-RME), teaching mathematics correctly is needed through learning practices in teaching and learning activities. This pedagogical activity requires guidance in the form of a curriculum. So, the teacher can determine the ethnomathematics context as a starting point in teaching mat...
Article
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Bahasinan is a traditional game, a maritime cultural heritage, which still exists today in the area of South Kalimantan, Indonesia, precisely in the village of Gunung Makmur. Bahasinan itself is a traditional game that should be played in groups. In Bahasinan, people can find many aspects that have strong correlation with the learning of mathematic...
Article
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Financial literacy is a knowledge and attitude about finance and is a 21st-century skill. As a knowledge, a cognitive factor of a person will impact their financial literacy skill. Through a bibliometric analysis study of 274 documents published from 1994 to 2022 in the Scopus database, we found that mathematics literacy is the cognitive factor of...
Article
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Freudhental's idea of Realistic Mathematics Education (RME) and D'Ambrosio's idea of Ethnomathematics must share some common principles. Both aim to create mathematics learning that eases students to understand concepts by discovering them and makes them understand the use of mathematics in response to their surrounding reality. I have implemented...
Book
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Buku Pidato Pengukuhan saya sebagai Guru Besar tetap dalam Bidang Ilmu Pendidikan Matematika pada Fakultas Keguruan dan Ilmu Pendidikan, Universitas Ahmad Dahlan, Yogyakarta, dengan judul Ethno-Realistic Mathematics Education, suatu Pembelajaran Matematika Realistik berkonteks Budaya Indonesia.
Article
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Learning the content of entrepreneurship arithmetic is an extension of social arithmetic that focuses on mathematical calculations in business or creative economy. Most teachers do not link students’ daily activities to classroom teaching and learning on traditional markets around the environment. This significantly affects the interest in learning...
Article
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The educational revolution has posed an immense challenge to the world of education. It demands the development of a generation that can take on the challenges and changes bred by the ever-rapid revolution. It is thus inevitable that education must enable improvements of individual hard skills and soft skills that are required to keep up with such...
Article
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Mathematics cannot be separated from human life. However, mathematics is often taught directly through formulas and abstract mathematical forms at school and is less associated with students' daily lives. Hence, it makes it difficult for students to understand mathematics and often find it difficult to understand how mathematics can be useful in de...
Article
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The rapid development of knowledge and technology in the 21st century brings significant challenges to the education field. Learning media used in learning follow technological developments and must help students understand the concepts being studied using contexts that are close to students. Especially in mathematics education, the approach that c...
Article
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The COVID-19 pandemic has made researchers from various fields make fundamental contributions according to their expertise. One of which is in the education field. The field has created research results and published them in reputable journals to increase the readability for the community. The published researches provide an overview of the challen...
Article
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How dyslexia students solve number operations is still challenging to unravel. This study aimed at revealing the types of errors conveyed by a dyslexic student in performing fractional operations on mathematical tasks that combined non-verbal text (symbols and pictures) and verbal text. The data were collected using a task-based interview with a 13...
Article
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The idea of ethnomathematics initiated by Urbiratan D'Ambrosio in 1977, has now used in Indonesia in the form of various studies on ethnomathematics in various cultures in Indonesia. However, since ethnomathematics implemented in Indonesia since 2013 until now, there has been no comprehensive study of how ethnomathematics study trends in Indonesia,...
Article
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A tambourine is one of the musical instruments commonly used in Islam. It is also used in an extracurricular activity in various schools so that many students are familiar with the instrument, making it relevant for learning mathematics. Furthermore, there is an approach to learning mathematics called Indonesian Realistic Mathematics Education (IRM...
Article
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Low-ability students are evidenced to have difficulties in understanding the concept of abstraction in mathematics , such as social arithmetic problems. It is because low-ability students have an IQ below the average of 70 to 90. Most teachers find it challenging to discover what kind of learning approaches that may be suitable for improving their...
Book
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This book is divided into two major sections: mathematical terms in English and mathematical symbols. This book provides alphabetical data regarding mathematical terms defined and translated into Indonesian in the first part. Furthermore, this book describes some symbols often used in learning mathematics in the second part. Furthermore, this book...
Article
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p> Abstract. Writing and publishing scientific articles are essential for researchers, lecturers, and students in Indonesia. However, many of them still have difficulty writing their research results in the form of scientific articles and publishing them in reputable international journals. So, this service activity is carried out to develop academ...
Article
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Teaching and learning activities are carried out online during the pandemic situation. This condition makes the teaching and learning process in the classroom requires teaching materials that can support the learning process. However, some teachers still use teaching materials commonly used during face-to-face learning, which is irrelevant for offl...
Article
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Space and shape is one of the geometry topics that should be mastered by students and require proper teachers’ Mathematics Content Knowledge (MCK) for teaching to avoid misconception. This study aimed at developing a constructive conceptual framework as an instrument to examine mathematics pre-service teachers’ MCK on space and shape contents and d...
Article
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Literasi matematika merupakan salah satu keterampilan yang penting untuk dimaksimalkan di abad ke-21. Namun, kemampuan ini masih belum banyak mendapat dukungan untuk dimaksimalkan, salah satunya dengan memberikan sejumlah soal yang dapat melatih kemampuan tersebut selama kegiatan belajar-mengajar. Oleh karena itu, penelitian ini bertujuan untuk men...
Article
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The environment is a global issue that must be addressed in a variety of ways, including education. Environmental topics will be included into mathematics, which is allowed to boost students' awareness of environmental concerns. This is a qualitative study conducted in a qualitative technique. The objectives of this study were to (1) describe stude...
Article
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Geometry is one of the essential mathematics materials, such as square and rectangle. However, most elementary school students experience difficulty in understanding it due to the abstractness of the geometric material. Furthermore, teachers teaching in the remote areas of Indonesia still encounter problems exploring this abstract material to make...
Article
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HOTS instruction in mathematics is rarely explicitly programmed by the schoolteacher. As a result, students' HOTS is at the lowest level, especially in national or international assessments. The purpose of this research is to determine why mathematics education in Indonesia does not have a significant effect on student HOTS by conducting a review o...
Article
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Freudenthal’s ideas on mathematics, namely Realistic Mathematics Education (RME), which suggested that mathematics is a human activity that must be connected to reality, have influenced how people learn mathematics worldwide, especially in Indonesia. RME is a mathematical instruction theory developed in the Netherlands (Van den Heuvel-Panhuizen & D...
Article
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Some countries have puppet culture in various forms, terms, and ways, including Indonesia. As a country with a diverse culture, it has detailed and comprehensive characteristics and stories related to puppets, especially the Javanese shadow puppet. Some experts have explored its characteristics and found out that it contains many mathematical eleme...
Article
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Cultural diversity around students can be integrated into learning mathematics in the classroom. Yet, Indonesian students still have difficulty applying mathematical concepts to solve problems related to everyday life, such as dilation and reflection in transformation geometry. Therefore, this study aims to design the dilation and reflection in tra...
Presentation
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Freudenthal's ideas on mathematics that stated mathematics as a human activity and mathematics must be connected to reality have colored towards learning mathematics worldwide, including Indonesia. Realistic Mathematics Education (RME) is a specific mathematics instruction theory from the Netherlands (Van den HeuvelPanhuizen & Drijvers, 2020). The...
Article
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Sejumlah penelitian terkait implementasi pembelajaran matematika pada anak berkebutuhan khusus (ABK) telah banyak dilakukan di Indonesia dan terpublikasi dalam jurnal-jurnal nasional terakreditasi. Namun, belum ada survei artikel mengenai penelitian-penelitian implementasi pembelajaran matematika pada ABK di Indonesia. Sehingga, tujuan dari penelit...
Article
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The long-term objective of this research is to produce valid, practical, and effective textbooks for courses in international program of mathematics education of Universitas Ahmad Dahlan. For the short-term, this research aims to produce valid and practical textbook for number theory course. The validity was based on the relevancy towards the stude...
Article
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Over the past decade, several researchers have documented the results of their research on the connection between mathematics anxiety and poor mathematical abilities of students. Therefore, the study of mathematical anxiety and its causal factors becomes an important research area. This study aims to determine the level of mathematics anxiety and t...
Article
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Indonesia has many cultures that can be used as a starting point in learning mathematics. Yet, many teachers still use conventional methods to provide explicit mathematical content without connecting with students' culture and daily activities. One of the learning approaches that can solve these problems is Realistic Mathematics Education (RME). Th...
Article
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One of indicators to determine the quality of a journal can be observed from how many indexing institutions recognized it nationally and globally, such as Sinta, Scopus, and ScimagoJR. Furthermore, the rank of a journal in the indexing institution will add more value to the reputation of a journal. However, few journal editors are willing to share...
Article
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Several Programme for International Student Assessment (PISA) research articles published in Indonesia have contributed to PISA research development in Indonesia, with mathematics as one of the PISA domains. However, there is no research to categorize the PISA research article to give future PISA researchers essential information. Therefore, this s...
Article
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The COVID-19 pandemic is a big challenge for education worldwide because education has to be done virtually to stop the spread of the COVID-19. The problem is that there are students who live in areas far from cities, while learning in an interconnected world should be done virtually. Diverse geographical conditions in Indonesia consisting of mount...
Article
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Students who have slow mathematical cognitive abilities or slow learners usually have difficulties understanding an abstract mathematical concept. One alternative learning that can improve the mathematical understanding of slow learners is the Indonesian Realistic Mathematics Education (IRME) approach. Therefore, this research aimed to determine th...
Book
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Buku ini dibagi ke dalam 3 bagian besar, mulai dari niat baik dalam riset dan membangun publikasi yang berkualitas, menuangkan hasil riset dalam bentuk artikel ilmiah, dan proses mempublikasikan artikel ilmiah di jurnal yang baik. Pada bagian pertama, penulis menceritakan tentang bagaimana menjadi atau membuat niat dan motivasi yang baik dalam mera...
Article
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Slow Learner students often have difficulty understanding mathematics content, one of which is direct and inverse proportion. This study aims to improve the student's understanding of the direct and inverse proportion material using the Contextual Teaching and Learning (CTL) approach. The research subject in this study was a single subject, namely...
Article
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Instructional materials are one of the essential parts to support the learning process becomes more exciting and meaningful. However, teachers do not yet give more attention to these parts, so that the learning process becomes uninteresting and boring. Therefore, this research aims to produce the instructional materials for the logical thinking of...
Article
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The pandemic era had an enormous influence on teaching and learning activities in all regions of the world. For urban areas that generally already have a variety of adequate facilities and infrastructure, it still has an impact on their learning activities. However, this outbreak in rural areas with limitations in teaching and learning activities h...
Article
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Measuring teachers' skills and competencies is necessary to ensure teacher quality and contribute to education quality. Research has shown teachers competencies and skills influence students’ performances. Previous studies explored teachers’ knowledge through testing. Teachers' knowledge of the topic of area-perimeter and teaching strategies has be...
Book
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Buku ini merupakan salah satu buku referensi yang mengkaji tentang apa dan mengapa seorang peneliti menggunakan metode penelitian Single Subject Research (SSR) dalam penelitiannya, untuk menjawab permasalahan pembelajaran pada siswa yang spesial. Buku ini diinspirasi dari buku karya Juang Sunanto (Universitas Pendidikan Indonesia), Koji Takeuchi (U...
Article
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Learning mathematics has a significant contribution to the students’ daily activities, one of which is on social arithmetic topic. The implementation of social arithmetic, in general, is mostly found in buying-selling and banking activities. However, students still find difficulties in understanding this topic. It is because the teaching and learni...
Article
Full-text available
Mathematics exists as rooted in human ideas, ways, and techniques to respond to their environments. Along with its development, mathematics has been taught through formal education or schooling in the flat- not flexible ways and far from students' social and cultural lives. Indonesia is rich with culture, including the Special Region of Yogyakarta...
Article
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Materi geometri merupakan materi yang penting untuk dipelajari karena berkaitan dengan kehidupan sehari-hari dan sebagai materi dasar pendukung penguasaan materi matematika yang lain. Namun, materi geometri, khususnya materi hubungan antar sudut, masih dianggap sulit dipahami oleh siswa. Oleh karena itu, dibutuhkan suatu model pembelajaran yang int...
Article
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Assessment is a crucial aspect of education. A critical point in the evaluation is the validity of the instruments used in conducting the assessment. However, some studies do not pay more attention to this section, which results in the invalid results of the resulting research. This study aimed to map the indicators of the Higher-Order Thinking Ski...
Book
Introduction to number theory. A handbook for undergraduate students
Article
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List of Organizing committee, Steering committee, Editorial Board and Scientific Commitee are available in this pdf.
Article
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The aim of this study is to describe the formal thinking process of students in solving algebraic problems. This study is descriptive qualitative, with two 7th grade subjects taken using a purposive sampling technique. The main instrument in this study is the researchers own judgment, Test of Logical Operations instruments, and algebraic problem-so...
Article
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The purpose of this study is to develop learning designs that incorporate environmental contexts into mathematics learning. The method used is a qualitative method using a literature review approach. The selection of research objects and literature is achieved through purposeful sampling techniques and by employing data search engines. Mathematics...
Article
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List of Organizing Committee, Steering Committee, Advisory Editorial Board, Scientific and Reviewer Committee are available in the pdf.
Article
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Preface Indonesian education system demands changes due to the dynamic challenges in human resources as the effect of the Industrial Revolution 4.0. As a result, the curriculum set into contemporary literacies: Data Literacy comprises the ability to read and analyze, Technology Literacy includes the ability to apply technology, and Human Literacy a...
Article
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Freudenthal's ideas on mathematics that stated mathematics as a human activity and mathematics must be connected to reality have colored towards learning mathematics all over the world, including Indonesia. Existing research on this topic in Indonesia among two decades is categorized and compared. This paper presents a systematic literature review...
Conference Paper
Full-text available
Fractions are universally known to be difficult to learn. Learning basic fractions may not be sustainable if one is to apply it to more advanced mathematical content knowledge as it is interlinked with other mathematics topics. In the effort to understand how children grasp the learning of fractions additions, a study was carried out with a random...

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