IndoMath: Indonesia Mathematics Education <div id="journalDescription"> <div id="journalDescription"><hr /> <table class="data" bgcolor="#f0f0f0"> <tbody> <tr valign="top"> <td width="30%">Journal title</td> <td width="70%"><strong> IndoMath: Indonesia Mathematics Education </strong></td> </tr> <tr valign="top"> <td width="30%">Frequency</td> <td width="70%"><strong>Two issues per year (February and August)</strong></td> </tr> <tr valign="top"> <td width="30%">DOI</td> <td width="70%"><strong>Prefix 10.30738 by Crossref<br /></strong></td> </tr> <tr valign="top"> <td width="30%">Print ISSN</td> <td width="70%"><strong><a href=";1515737386&amp;1&amp;&amp;">2614-5103</a></strong></td> </tr> <tr valign="top"> <td width="20%">Online ISSN</td> <td width="70%"><strong><a href=";1515737631&amp;1&amp;&amp;"><strong>2614-5111</strong></a></strong></td> </tr> <tr valign="top"> <td width="30%">Editor-in-chief</td> <td width="70%"><a href=""><strong>--</strong></a></td> </tr> <tr valign="top"> <td width="30%">Managing Editor</td> <td width="70%"><a href=""><strong>Dr. Muhammad Irfan, S.Si., M.Pd</strong></a></td> </tr> <tr valign="top"> <td width="30%">Publisher</td> <td width="70%"><strong><a href="" target="_blank" rel="noopener"><strong>Universitas Sarjanawiyata Tamansiswa</strong></a></strong></td> </tr> <tr valign="top"> <td width="30%">Citation Analysis</td> <td width="70%"><a href=";hl=id" target="_blank" rel="noopener"><strong>Google Scholar</strong></a></td> </tr> </tbody> </table> </div> </div> en-US <p>Please find the rights and licenses in IndoMath: Indonesia Mathematics Education. By submitting the article/manuscript of the article, the author(s) accept this policy.</p><p><strong>1. License</strong></p><p>The non-commercial use of the article will be governed by the Creative Commons Attribution license as currently displayed on <a href="" target="_blank"><span class="cc-license-title">Attribution-NonCommercial-ShareAlike 4.0 International</span> <span class="cc-license-identifier"> (CC BY-NC-SA 4.0)</span></a>. </p><p><strong>2. Author’s Warranties</strong></p><p>The author warrants that the article is original, written by stated author(s), has not been published before, contains no unlawful statements, does not infringe the rights of others, is subject to copyright that is vested exclusively in the author and free of any third party rights, and that any necessary written permissions to quote from other sources have been obtained by the author(s).</p><p><strong>3. User Rights</strong></p><p>IndoMath spirit is to disseminate articles published are as free as possible. Under the <a href="" target="_blank">Creative Commons license</a><a href="">,</a> IndoMath permits users to copy, distribute, display, and perform the work for non-commercial purposes only. Users will also need to attribute authors and IndoMath on distributing works in the journal.</p><p><strong>4. Rights of Authors</strong></p><p>Authors retain all their rights to the published works, such as (but not limited to) the following rights;</p><ul><li>Copyright and other proprietary rights relating to the article, such as patent rights,</li><li>The right to use the substance of the article in own future works, including lectures and books,</li><li>The right to reproduce the article for own purposes,</li><li>The right to self-archive the article,</li><li>The right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the article's published version (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal (IndoMath: Indonesia Mathematics Education).</li></ul><p><strong>5. Co-Authorship</strong></p><p>If the article was jointly prepared by other authors, any authors submitting the manuscript warrants that he/she has been authorized by all co-authors to be agreed on this copyright and license notice (agreement) on their behalf, and agrees to inform his/her co-authors of the terms of this policy. IndoMath will not be held liable for anything that may arise due to the author(s) internal dispute. IndoMath will only communicate with the corresponding author.</p><p><strong>6. Royalties</strong></p><p>This agreement entitles the author to no royalties or other fees. To such extent as legally permissible, the author waives his or her right to collect royalties relative to the article in respect of any use of the article by IndoMath.</p><p><strong>7. Miscellaneous</strong></p><p>IndoMath will publish the article (or have it published) in the journal if the article’s editorial process is successfully completed. IndoMath editors may modify the article to a style of punctuation, spelling, capitalization, referencing and usage that deems appropriate. The author acknowledges that the article may be published so that it will be publicly accessible and such access will be free of charge for the readers as mentioned in point 3.</p> (Sri Adi Widodo) (Muhammad Irfan) Mon, 18 Jan 2021 00:00:00 +0700 OJS 60 The Development of Calculus Teaching Materials using Geogebra <p><em>The purpose of this study is to find out the calculus teaching material using GeoGebra, knowing the results of expert validation in terms of multimedia and material, and knowing the effectiveness of using calculus teaching material using GeoGebra. The research method used is research and development. The research subjects were 155 students in Departement of Mathematics Education at Universitas Suryakancana. The results of the validation of media experts using the Kendall test, sig. = 0.062 &gt; 0.05 (Ho accepted) means that the calculus teaching material using GeoGebra is feasible to use. The results of the validation of the material using the Kendall test, sig. = 0.065 &gt; 0.05 (Ho accepted) means that the material content is appropriate. The results of tests on 155 students in Departement of Mathematics Education at Universitas Suryakancana, an average percentage of 78% of students answered strongly agree and 15% answered agreed, meaning that calculus teaching material using GeoGebra is effectively used.</em></p> Ari Septian, Darhim Darhim, Sufyani Prabawanto Copyright (c) 2021 Ari Septian, Darhim Darhim, Sufyani Prabawanto Mon, 01 Feb 2021 00:00:00 +0700 Ethnomathematics Based Geometry Module Development With a Scientific Approach to Improve Students' Metacognition Ability <p><em>This study aims to develop a geometry module based on ethnomathematics with a scientific approach, test the module's validity and feasibility, and determine the effect of using modules in learning on students' metacognitive abilities. This study uses a research and development (R&amp;D) approach with a 4D model (define, design, develop, and disseminate). The research subjects were students of 8<sup>rd</sup> Junior High School in Malang. Data analysis of the effect of the use of modules on metacognition abilities using the paired sample t-test. The research results showed the ethnomathematics based geomery module with a scientific approach is valid, developed by with a 4D model. The module is also categorized as effective for use in learning activities. The ethnomathematics based geometry modules with a scientific approach has an effect on metacognition abilities. </em></p> Achmad Mutaqin, Mohammad Syaifuddin, Yus Mochamad Cholily Copyright (c) 2021 Mohammad Syaifuddin, Achmad Mutaqin, Yus Mochamad Cholily Mon, 01 Feb 2021 00:00:00 +0700 Analysis of Creative Thinking Abilities of Prospective Mathematics Teachers in Solving and Posing Quadrilateral Open-ended Problems <p>Prospective teachers are required to develop their creative thinking abilities. The creative thinking abilities can help prospective teachers in designing the learning process, one of which is in designing non-routine problems as an evaluation of learning. This study aims to describe the creative thinking abilities of six sixth-semester students of Mathematics Education at Sanata Dharma University in solving and posing open-ended problems on the topic of quadrilateral. Data collection methods used are written tests to solve and pose open-ended problems and interviews. Data analysis adopted the framework of qualitative data analysis namely <em>data reduction</em>, <em>data display</em>, and <em>conclusion drawing</em>. The results showed that (1) the students' creative thinking abilities in solving open-ended quadrilateral problems were categorized into four categories namely very poor (1 student), poor (3 students), fair (2 students) and good (1 student), (2) the students' creative thinking abilities in posing open-ended quadrilateral problems were categorized into three categories of creative thinking abilities namely very poor (2 students), poor (1 student) and very good (3 students).</p> Jovitha Indah Gisbtarani, Veronika Fitri Rianasari Copyright (c) 2021 Veronika Fitri Rianasari Mon, 01 Feb 2021 00:00:00 +0700 Feasibility of RME-Based Bilingual E-Module on 3D Shapes with Curved Surfaces <p>A bilingual e-module that is systematically structured and linked to contextual problems can help students learn independently anywhere and anytime, especially in a pandemic that applies distance learning. RME is an approach that views mathematics as an activity/ process in contextual problems so that students find their own understanding. This study examines the feasibility of an RME-based bilingual e-module on 3D shapes with curved surfaces materials from expert judgment on material, language, and media. This research model is the ADDIE model. There are 6 validators (2 material experts, 2 media experts, and 2 linguists). The research instrument was in the form of assessment based on expert judgement. The results showed that both material, media, and language used for the RME-based bilingual e-module is "feasible” to use in mathematics learning.</p> Pitriani Pitriani, Putra Pratama Copyright (c) 2021 Pitriani Pitriani, Putra Pratama Mon, 01 Feb 2021 00:00:00 +0700 Ethnomathematics: Utilization of Crock, Ladle, and Chopping Board for Learning Material of Geometry at the Elementary School <p>Mathematics and culture are not mutually exclusive. They work well together. It is because the help of ethnomathematics. Ethnomathematics is a learning approach of mathematics seeking a cultural approach in mathematical concepts.  This study aims at exploring the shape of the crock (earthenware jar), ladle, and chopping board associated with learning materials of the two-dimensional and three-dimensional figure at the elementary school level. The research method used was descriptive qualitative, conducted adopting an ethnographic approach. The ethnographic approach consists of three stages: selection, writing and exploration. The study results found that the shape of the crock (earthenware jar), ladle, and chopping board contained mathematical elements, which are two-dimensional figure including circles and rectangles as well as three-dimensional figure including cuboid, cone and ball.</p> Ahmad Faqih, Odi Nurdiawan, Andi Setiawan Copyright (c) 2021 Ahmad Faqih Mon, 01 Feb 2021 00:00:00 +0700 Conceptual Understanding of Complex Analysis Number using Flipped Learning <p><em>Flipped Learning is one of the alternatives of teaching and learning approach in mathematics classroom. The objective of this study is exploring students’ conceptual understanding about complex number using flipped learning with handout. The subject of the study are the students in 5<sup>th</sup> semester students of mathematics education department in 2019/2020. The study used qualitative approach to describe the implementation of flipped learning.</em></p><em>There are 31,6% of 19 respondents give score very satisfied. This result then observed by using the test with all the students understand with the definition of complex numbers. Besides they can adapt their learning activity using flipped learning with complex analysis handout. As legibility aspect of the handout, there are 52,6% of the respondents gives score satisfied and 26,3% of the respondents are very satisfied. The score indicates that the flipped learning with handout helps students to understand about the complex number concepts.</em> Fariz Setyawan, Siti Nur Rohmah Copyright (c) 2021 Fariz Setyawan, Siti Nur Rohmah Tue, 02 Feb 2021 00:00:00 +0700 Depicting Epistemological Obstacles in Understanding the Concept of Sequence and Series <p>This study aimed to discover epistemological obstacle on secondary students to solve sequence and series problems based on three indicators, there are a conceptual obstacle, procedural obstacle, and operational technique obstacle. This study was descriptive with qualitative research approaches. Data were collected with the test and interview method. The subjects in this study are students of SMP Negeri 86 Jakarta class VIII based on the errors seen from the diagnostic tests that had been tested. The analysis was done by giving written tests which are essay and interview formatted. Results on analysis showed that: (1) Conceptual obstacle, obstacle that was experienced by students are: students considered that a pattern was said as a numeral pattern because they own odd numeral pattern and own 2,2,2 of difference; were not able to find exact pattern within the problem; considering that Fibonacci numeral sequence was a pattern that form prime numeral pattern; were not able to differ the concept of arithmetics and geometry sequence; were not able to understand the concept of first quarter on arithmetics sequence; error when interpreted the meaning of problems; were not able to intepret what was given on mathematics model; interpreting sum of the first 20 quarters with sequences which own the 20th quarter; and interpreting sum of the first 20 quarters with the 20th quarter; (2) While on procedural obstacle, obstacle that was experienced are: interpreting numeral pattern if they own their pair; error on determining multiplication or difference; and applying formulas incorrectly; (3) Last on operasional technique obstacle, obstacle that was experienced are error on calculation and using sign and symbol mathematics incorrectly.</p> Samsul Maarif, Krisna Satrio Perbowo, Rahmat Kusharyadi Copyright (c) 2021 Samsul - Maarif, Krisna Satrio Perbowo, Rahmat - Kusharyadi Tue, 09 Feb 2021 00:00:00 +0700