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All Journal International Journal of Evaluation and Research in Education (IJERE) Jurnal Infinity Rangkiang Mathematics Journal JNPM (Jurnal Nasional Pendidikan Matematika) Jurnal Infinity
Wahyu Hidayat
Institut Keguruan Dan Ilmu Pendidikan Siliwangi
Education Mathematics Other

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GEOMETRY EXPLORATION ACTIVITIES ASSISTED WITH DYNAMIC GEOMETRY SOFTWARE (DGS) IN A TEACHER EDUCATION CLASSROOM Samsul Maarif; Wahyudin Wahyudin; Muchamad Subali Noto; Wahyu Hidayat; Herri Mulyono
Jurnal Infinity Vol 7 No 2 (2018): Volume 7 Number 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v7i2.p133-146

Abstract

The aims of this study were conducted to investigate the effectiveness of pre-service teachers’ geometric exploration activities assisted by Dynamic Geometry Software (DGS) Cabri II Plus computer application in constructing geometry proofs in a teacher education classroom. To these ends, mix-method design. A total of 72 pre-service teachers taking geometry course participated in the study. Findings of the study show that students who participated in geometric exploration activities assisted by DGS Cabri II Plus computer application had better achievement compared to their counterpart. The use of DGS Cabri II Plus computer application was observed to enable the students to present diagrams of verification problems appropriately, determine the valid conjectures, and make justification regarding the statements in the written proof. More importantly, participating in geometric exploration activities assisted by DGS Cabri II Plus computer application provide students with opportunities to explore alternative proofs related to geometry.
TWO DECADES OF REALISTIC MATHEMATICS EDUCATION RESEARCH IN INDONESIA: A SURVEY Rully Charitas Indra Prahmana; Laela Sagita; Wahyu Hidayat; Niken Wahyu Utami
Jurnal Infinity Vol 9 No 2 (2020): VOLUME 9, NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v9i2.p223-246

Abstract

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 of empirical studies on this learning approach in Indonesian context. The implementation of this approach in Indonesia was analyzed comprehensively and divided into several major topics. Resources of this research come from 110 articles by ten highest rank accredited journals by the Ministry of Research, Technology, and Higher Education, the Republic of Indonesia as an achievement for the peer-reviewed journal, which has excellent quality in management and publication. The results show that there are seven categories summarized in this research: the dominance of published RME articles, RME research subjects, mathematical topics, students' abilities, RME terms, and the research method used in RME articles. Lastly, the summarized 110 papers are displayed in the table to give essential information as a fundamental idea for further RME research.
THE STUDENTS' MATHEMATICAL PROBLEM-SOLVING ABILITIES, SELF-REGULATED LEARNING, AND VBA MICROSOFT WORD IN NEW NORMAL: A DEVELOPMENT OF TEACHING MATERIALS Citra Megiana Pertiwi; Euis Eti Rohaeti; Wahyu Hidayat
Jurnal Infinity Vol 10 No 1 (2021): VOLUME 10, NUMBER 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v10i1.p17-30

Abstract

The new normal period makes ICT-based education the spearhead of the implementation of learning. This becomes an obstacle and a challenge for students, especially in the mathematical problem-solving ability (MPSA), which is very important for students because it is a prior mathematical ability and is included in HOTS. Self-regulated learning in mathematics (SRL) also has a significant role in adapting to learning in the new normal and influences students' mathematical learning outcomes. However, the facts on the ground show that these two abilities are still low. To solve this problem, the researchers developed VBA Microsoft Word-based teaching materials on the relevant polyhedron materials for use so that learning would be more optimal. The method used in this research is an experimental method with a pretest-posttest control group design. The population is all the students in Cimahi City, while the sample is two classes randomly selected. This study indicates that VBA Microsoft Word-based teaching materials are appropriate to be applied in the new normal period, as indicated by the results of the achievement and improvement of MPSA and SRL of students is better than ordinary learning. There is an association between MPSA and SRL and positive response even though they still have difficulty making mathematical models on MPSA questions. Students are more enthusiastic in learning and don't get bored quickly; in line with the challenges of the new normal, the industrial revolution 4.0, and the learning curriculum, learning is more structured, interactive, effective, and efficient.
INVESTIGATION OF STUDENTS' BEHAVIOR IN MATHEMATICAL PROBLEM SOLVING Yulyanti Harisman; Muchamad Subali Noto; Wahyu Hidayat
Jurnal Infinity Vol 10 No 2 (2021): VOLUME 10, NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v10i2.p235-258

Abstract

This study is a qualitative research by using the descriptive method that aims to examine the behaviour of eighteen students in Bandung, Indonesia. Six issues related to geometry were given to eighteen of second-grade junior high school students with heterogeneous abilities. The problems given to the students contained all of the problem-solving strategies such as guessing and checking, make a picture, make a list, make a table, working backwards, looking patterns, and using a logical reason, solving simple problems and making questions. Data collection was conducted through mathematical problem-solving tests, recording students’ presentations, and interviewing among researchers and students after doing the problems. The result of recording was a video during the presentation process, and the interview would explore their understanding of the given problems to see the behaviour used by subjects of the research. The data in this research showed that many students’ behaviour identified; in the relevant literature, there are terms of the behaviour of problem-solving naive, routine, and sophisticated. However, the category "naïve," "routine," and "sophisticated" did not fully draw various behaviours observed, it was obtained additional category termed behavioural problem solver "naïve," "routine," "semi-sophisticated" and "sophisticated". It was due to the category of regular students can be divided into two, some students can be directed, and some of them cannot be directed to sophisticated behaviour. Thus, the routine category can be classified into two categories: routine and semi-sophisticated.
THE PROCESS OF CONCEPTUALIZATION IN SOLVING GEOMETRIC-FUNCTION PROBLEMS Masta Hutajulu; Krisna Satrio Perbowo; Fiki Alghadari; Eva Dwi Minarti; Wahyu Hidayat
Jurnal Infinity Vol 11 No 1 (2022): VOLUME 11, NUMBER 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v11i1.p145-162

Abstract

Functional analysis has been of interest and the thinking of students should be prepared.  Analyzing the process of conceptualizing geometric function problem solving based on the dimensions of cognitive processes and knowledge was the purpose of this study. The subjects of this study were three students selected purposively from one of the secondary schools in Indonesia. Exploration of these studies with constant comparative techniques. The results of the data analysis show that the cognitive processes that operate and the knowledge applied by students focus on the conceptualization of algebraic representations. Based on the conceptualization process, students' conceptual systems are still fragmented because of the problem of the relationship between the concept and the basis of its relationship. As a result, procedural knowledge is more dominant.
DEVELOPMENT OF COMBINED MODULE USING CONTEXTUAL SCIENTIFIC APPROACH TO ENHANCE STUDENTS' COGNITIVE AND AFFECTIVE Muhamad Yusup Kurniansyah; Wahyu Hidayat; Euis Eti Rohaeti
Jurnal Infinity Vol 11 No 2 (2022): VOLUME 11, NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v11i2.p349-366

Abstract

This research on the development of experimental product test designs aims to develop learning products to solve problems that occur in the field and find out and analyze the mathematical problem-solving abilities and Habits of Mind of MTs students whose learning uses a combination of scientific approaches and contextual approaches compared to MTs students who use scientific approaches. The research subjects were conducted on students in Indonesia with details of 1 class at MTs Azzahra Batujajar for a limited trial, three classes from MTs Bhakti Pertiwi Cililin, MTs Albidayah, and MTs Al-Mukhtariyah Rajamandala for field trials, and two classes at MTs Nurul Hidayah Batujajar for product testing and used as the experimental class and the control class. The instrument in this research is a set of mathematical problem-solving abilities and a non-test to determine the students' Habits of Mind. The results of this study indicate that the process of developing teaching materials is carried out well, and the product is feasible to use. Mathematical problem-solving abilities and Habits of Mind of students who receive learning using a combination of scientific and contextual approaches are better than those who receive knowledge using a scientific approach.
HOW TO DEVELOP AN E-LKPD WITH A SCIENTIFIC APPROACH TO ACHIEVING STUDENTS' MATHEMATICAL COMMUNICATION ABILITIES? Wahyu Hidayat; Usman Aripin
Jurnal Infinity Vol 12 No 1 (2023): VOLUME 12, NUMBER 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v12i1.p85-100

Abstract

This research aims to look into the growth and effectiveness of E-LKPD on the mathematical communication skills of seventh-grade junior high school students. The design research development study was used. This study is divided into two parts: preliminary (preliminary study and design of E-LKPD) and formative evaluation (evaluation and revision). The research subjects included 49 SMP Negeri 3 Ngamprah's class VIII students. The research instrument had interview sheets, expert validation sheets, observation sheets, student response questionnaires, and five questions about mathematical communication skills. Lines and angles were used in this study as the material. Data processing techniques in the development process use the Likert Scale type of measurement scale to calculate the percentage of each indicator with the help of Canva and test the effectiveness of the E-LKPD using Inferential Statistics with the Wilcoxon test with the help of SPSS. According to the study's findings, the feasibility of LKPD is Eligible. The study's results also show that an E-LKPD influences students' mathematical communication abilities, indicating that the developed E-LKPD has effectiveness.
Exploring contributing factors to PISA 2022 mathematics achievement: Insights from Indonesian teachers Tommy Tanu Wijaya; Wahyu Hidayat; Neni Hermita; Jesi Alexander Alim; Corrienna Abdul Talib
Jurnal Infinity Vol 13 No 1 (2024): VOLUME 13, NUMBER 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v13i1.p139-156

Abstract

As an international benchmark, the Programme for International Student Assessment (PISA) 2022 evaluates the educational performance of 15-year-old students across various countries. It has been observed that the average mathematics score globally declined in 2022. Understanding the responses of mathematics teachers, as practitioners, to the PISA 2022 results is crucial for evaluating the reasons behind this decline in mathematics scores. This research aims to explore and understand the perspectives of Indonesian mathematics teachers on the factors contributing to the low PISA 2022 mathematics scores. This study employs a qualitative approach, with participants being randomly selected and includes interviews with 36 mathematics teachers in Indonesia. According to the statements provided by teachers, the decline in mathematics scores in the 2022 PISA, relative to the years 2018 and 2015, can be attributed to six primary factors: pandemic-related issues, curriculum, individual factors, resource limitations, student factors, and parental involvement. Subsequently, mathematics teachers provided several recommendations for the government, schools, and parents that might enhance student mathematics achievement. These recommendations include conducting more training, improving ICT facilities in schools, and strengthening parental knowledge about the importance of parental support. The findings of this study offer various recommendations that could be implemented by the government, schools, and mathematics teachers to improve student mathematical achievement and potentially increase PISA scores in 2025.
Co-Authors Anisyah Pratiwi Putri Citra Megiana Pertiwi Corrienna Abdul Talib Eti Rohaeti, Euis Euis Eti Rohaeti Eva Dwi Minarti Fiki Alghadari Herri Mulyono Jesi Alexander Alim Krisna Satrio Perbowo Laela Sagita Lukman Harun Masta Hutajulu Muchamad Subali Noto Muhamad Yusup Kurniansyah Neni Hermita Niken Wahyu Utami Rully Charitas Indra Prahmana Samsul Maarif Sri Adi Widodo Syahrizal, Trisnendri Tommy Tanu Wijaya Usman Aripin Usman Aripin Yulyanti Harisman