Indonesia Conference Directory

Corresponding Author
Yanti Mulyanti

Institutions
1Program Studi Pendidikan Matematika, FKIP UMMI
2Pendidikan Matematika, FMIPA UPI
3Pendidikan Matematika, FMIPA UPI
4Pendidikan Matematika, FMIPA UPI

Abstract
This study aims to determine the initial ability of students of the Mathematics and Teaching Faculty of Muhammadiyah Sukabumi (FKIP UMMI) Mathematics Education Study Program as a mathematician (Mathpreneur) entrepreneur who has contracted Entrepreneurship courses. The research method used is descriptive with a quantitative approach. Data collection using survey methods, using instruments in the form of questionnaires whose statements are based on the components of entrepreneur character.

Keywords
The character of Mathpreneur, Student of Mathematics Education

Topic
Mathematics Education

Link: https://ifory.id/abstract/cDBVjJAZ3286

Corresponding Author
Arif Sunaryo

Institutions
IKIP Siliwangi

Abstract
There are still many students who have difficulty in learning mathematics about the matter of changing ordinary fractions into mixed fraction forms because students do not understand the provisions that are the basis of how ordinary fractions can be transformed into mixed fractions. That is still not able to distinguish the definitions of the numerator and the denominator in fractions, besides that students have not been able to interpret the form of fractions correctly in terms of the fundamental ability of understanding the mathematical thinking process. The benefit of VBA for Excel elementary school is to associate mathematical concepts from fractional material that can help students understand the thinking process in visual form. The development of technology now makes the media more efficient and faster, therefore with the help of technology, a teacher or teacher can make a lot of media that is tailored to the needs of teaching in the classroom. The method used in media development uses ADDIE (Analysis of Design Development Implementation and Evaluation). And the feasibility of instructional media from the assessment of media experts and material experts. Before carrying out implementation in class, the media and material are assessed by users or elementary school mathematics teacher to get a questionnaire assessment and enter the evaluation as a media improvement that will be implemented to students.

Keywords
Understanding Ability, VBA for Excel, ordinary fractions, mixture fractions

Topic
Mathematics Education

Link: https://ifory.id/abstract/FLcmAwdKbghY

Corresponding Author
ayu aristika

Institutions
1Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
2Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Abstract. Mathematical material and mathematical thinking abilities are two things that are constantly evolving, that is, between mathematical material understood through mathematical thinking skills possessed by students need to be further developed through learning mathematical and mathematical material that continues to grow more widely. Therefore, in mathematics learning it is necessary to develop AMT students abilities. This meta-analysis uses the results of experimental studies regarding the effect of learning strategies on students AMT abilities. Of the ten research reports, 18 research findings were obtained which were then the subject of this study. This meta-analysis aims to determine the overall effect of learning strategies on students AMT abilities, as well as the effect of the three aspects found in these experiments, namely the level of education, tools/learning media, and the types of strategies used. The results of the analysis show that learning strategies are effective in improving the ability of AMT students, with the effect of the greatest influence based on the type of learning strategy that is cooperative. Other findings indicate that the learning strategy at the senior secondary level is more effective. Whereas based on learning aids/media it can be seen that student worksheets are more influential.

Keywords
meta-Analysis, Strategies, Advaned Mathematical thinking

Topic
Mathematics Education

Link: https://ifory.id/abstract/KFRdu3VbcPxT

Corresponding Author
Rina Oktaviana Sihotang

Institutions
a)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia
*viasihotang11[at]gmail.com
b)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia
c)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia

Abstract
This research is motivated by the importance of metacognition skills as one of the skills that supports student to be success in solving mathematical problems. The purpose of this study describes the metacognition skills of the gifted and talented students in solving mathematical problems of Pythagorean. This research is a descriptive research with qualitative approach. The method of collecting data was using both written tests and interview. The research subjects consisted of three the gifted and talented students from 8th grade at Junior High School in Jambi based on PMA (Prior Mathematical Ability) with the high, medium, and low capability. The results showed that the gifted and talented students have been able to meet some indicators of metacognition skills. A gifted and talented student with low mathematical ability is able to meet planning indicators, but unable to meet monitoring and evaluation indicators on all problems. Gifted and talented students with medium and high mathematical ability are able to meet planning indicators, but unable to meet monitoring and evaluation indicators on some problem. But, a gifted and talented student with high mathematical ability is able to monitor and realize the mistakes quickly.

Keywords
Metacognition Skills, The Gifted and Talented Students, Problem Solving, Pythagorean

Topic
Mathematics Education

Link: https://ifory.id/abstract/ZWkXVGx27tg4

Corresponding Author
Benidiktus Tanujaya

Institutions
University of Papua

Abstract
The purpose of this research was to study the application of think pair share, the type of cooperative models, which can be implemented in mathematics instruction in Manokwari, West Papua Indonesia. This study was conducted at Senior High School of Manokwari (SMA Negeri 1) and Mathematics Education Department, the University of Papua. The research was carried out using research and development methods. The results showed that there were two main things in the application of the think pair share model in mathematics instruction in Manokwari West Papua, particularly the selection of group members and the determination of the number of group members. Group members must consist of students who already know each other well, while the number of group members must start from two students.

Keywords
modification of think pair share, mathematics instruction

Topic
Mathematics Education

Link: https://ifory.id/abstract/Dnc3wZpWTX9e

Corresponding Author
Siti Nurjanah

Institutions
INDONESIAN UNIVERSITY OF EDUCATION

Abstract
This study aims to design Moodle-based e-learning based on mathematical solving of high school students and to determine the level of feasibility and effectiveness of Moodle-based e-learning based on solving high school students problems. This research is included in research and development with steps, as follows: potential and problem, gathering information, product design, design validation, design improvements, product trials, product revisions, usage trials, product revisions, and the final result. The subjects of the study were Siti Nurjanah. Data collection techniques in the form of literature studies. The results of the study based on the literature study shows that the average score of media experts is 88.67% included in the good category, the average score of material experts is 80.67% included in the sufficient category, while the average score of mathematics learning outcomes is 83% is included in the high category with the results of the t group test in one group design being 11.510. Based on data analysis, it can be concluded that the use of e-learning based on Moodle is based on proper problem solving and is effectively used in high school.

Keywords
Development, E-Learning, Moodle, Mathematical Solving

Topic
Mathematics Education

Link: https://ifory.id/abstract/7RJQ8ByPfNpF

Corresponding Author
Findinilah Faraswati

Institutions
1)Departemen Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*findinilah.faraswati[at]upi.edu
2)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
The underlying problem of this research is the lack of students competencies in understanding the concept area of triangle in geometry as the results of the teaching and learning pattern that only receiving information rather than to construct knowledge. The process of construct knowledge by students during learning requires high attention and motivation from students for learning which is then facilitated by the teacher. The purpose of this research is to develop the didactical design of area of triangle that is to construct knowledge and motivation to learn geometry involving student motor action. The used research method is a qualitative research in the form of the didactical design research through three phases of analysis i.e. didactical situation analysis, metapedadidactical analysis, and retrospective analysis, which conducted in students from 7th grade at one of public schools in West Bandung Regency. Based on the results of research and analysis, the didactical designs that has been made is capable to change students learning habit, construct students learning motivation and are quite capable of developing students competencies in the concept of triangle area.

Keywords
motoric action; didactical design; learning of triangle area

Topic
Mathematics Education

Link: https://ifory.id/abstract/qWXzrVme2uBp

Corresponding Author
BONITA CHINDIANI N

Institutions
a) Post Graduate School, Indonesia University of Education
Jl. DR. Setiabudi No 229, Bandung, Indonesia,
bonitachindianin[at]upi.edu
b) Indonesia University of Education

Abstract
This research is case study of one elementary school student who calculates the division by performing a reversal operation against multiplication. Usually the division calculation is done by through collated divisions, but these students do the division by doing multiplication operations.

Keywords
Division Operation

Topic
Mathematics Education

Link: https://ifory.id/abstract/mRzCyXYT4ker

Corresponding Author
Christine Wulandari Suryaningrum

Institutions
a) Universitas Muhammadiyah Jember

Abstract
Representation has an important role in solving mathematical problems. Problems that initially seem difficult and complicated can be seen more easily and simply by considering its representations. Mathematical expressions can be interpreted with various representations including visual representation, symbol representation, verbal representation and multiple representations. In Peirce theory, semiotic consists of three aspects, namely sign, object and interpretant. A semiotic reasoning is a process of deducing a conclusion based on the object, sign (representamen), and students interpretation in interpreting the meaning of sign (interpretant). This study aims to identify the mathematical representations of 3rd grade students in solving problems of fractions. The type of this study is qualitative research with case analysis of case studies. The participants of the present study are 3rd grade students of a private primary school in Jember. The results show that first participant 1 used verbal, visual, and symbol representations. The steps taken by the first participant in solving the problems were correct but the participant drew a wrong conclusion caused by the lack of practice in solving non-routine problems. Second participant solved the problem by using verbal and visual representations. The second participant described the solution with verbal ability and could solve the problem correctly. Third participant solved the problem by employing verbal and visual representations. The steps of the third participant in solving problem were correct but the participant drew a wrong conclusion caused by the lack of ability in understanding the concept of fractions. The conclusion is three participants used multiple representations, namely visual, verbal, and symbol representation in solving a problem.

Keywords
visual representation; verbal presentation; symbol representation; problem solving; fraction

Topic
Mathematics Education

Link: https://ifory.id/abstract/DgtU4NHVmTJG

Corresponding Author
Sri Rejeki

Institutions
a) Department of Mathematics Education, Universitas Muhammadiyah Surakarta, Jl. Ahmad Yani Tromol Pos 1, Jawa Tengah 57162, Indonesia
*sri.rejeki[at]ums.ac.id

Abstract
In designing mathematics problems, mathematics student teachers sometimes do not notice the criteria which should be considered. Therefore, this study aims at supporting mathematics student teachers- skill in designing mathematics problems, particularly in geometry for junior high school. Design research is the research approach used in this study. This study involves all students at the department of mathematics education, Universitas Muhammadiyah Surakarta, who took teaching mathematics for junior high school. A set of learning activities consisted of three meetings was designed collaboratively through lesson study. The data collection was conducted using students- written work and video registration. The data was analysed by confronting the hypothetical learning trajectory and the actual learning. Based on the analysis, it can be concluded that the learning activities designed, support mathematics students teachers- skill in designing geometric problems. The first meeting gives overview on both students- errors in solving geometric problems and teachers- errors in designing geometric problems. The second meeting emphasizes the skills in both designing geometric problems and predicting students- responses. The third activity gives notions on confronting the prediction of students- responses and students- actual responses. Moreover, the stages of lesson study applied improve both the lessons designed and the learning activities.

Keywords
Geometric problems, Design research, Lesson study

Topic
Mathematics Education

Link: https://ifory.id/abstract/bNz4PVpURu7d

Corresponding Author
NURDINI ELMUNAWARAH

Institutions
a) Master of Mathematics Education, Sriwijaya University, Komplek Unsri Jalan Srijaya Negara Bukit Lama, Kec. Ilir Barat I, Palembang 30137, Indonesia
*ratu.ilma[at]yahoo.com
b) Master of Mathematics Education, Sriwijaya University, Komplek Unsri Jalan Srijaya Negara Bukit Lama, Kec. Ilir Barat I, Palembang 30137, Indonesia

Abstract
The aims of this article was to design PISA-like problems of mathematics by using online ticketing system as its context and Macromedia Flash as its media that is valid, practical, and has potential effects. This research method is Design Research type of development studies with two stages, namely preliminary and formative evaluation. The research subjects were class X students of Senior High School Number 1 Palembang. Data collection techniques with documents, wolkthrough, tests, interviews, and observations. In the learning process, this research uses the Indonesian Realistic Mathematics Education (PMRI) approach with the Lesson Study for learning Community (LSLC) system where all mathematics teachers in class X are involved starting from the process of developing the problem to the field test. Based on the results of the study it was found that the mathematical problem of the PISA model uses the context of online tickets through interactive learning media assisted by Adobe Flash Macromedia which is valid and practical, and has potential effects. Valid in terms of content, constructs, language, and workmanship of students in the one-to-one stage. Practical seen from the workmanship of students in the small group stage. From the results of the field test it was found that the problem has a potential effect on mathematical literacy skills, namely communication, mathematizing, representation, reasoning and argument, devising strategies for solving problems, using symbolic, formal, and technical language and operation.

Keywords
PISA, Mathematical Literacy, Online Tickets, Macromedia Adobe Flash

Topic
Mathematics Education

Link: https://ifory.id/abstract/pvBtJnjR9GaL

Corresponding Author
Lia Ardiansari

Institutions
Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
This paper reports an investigation of students understanding of distributive law used to facilitate students awareness of equations is an equivalent expression where each equation can be replaced by an equivalent equation. A total of 53 students from one secondary school were randomly selected to participate in the study using this cross-sectional approach. The results of the study indicate that the use of operation sense of students in understanding distributive law can be grouped into three levels where level 2 is the transition stage (i.e a pre-algebraic stage) from level 1 to level 3. Students who have been proficient in using distributive law in arithmetic, still have difficulty in applying it to algebraic manipulation. One of the causes of this difficulty is the lack of students understanding of the same sign as a sign of equality. In addition, the absence of parentheses also seems to be a stumbling block for students in recognizing distributive law. The reason for expanding the notion of the same sign by using distributive traits is to provide a foundation for their operation sense construction so as to provide further meaning for equations in algebra and minimize student difficulties in learning school algebra.

Keywords
operation sense, distributive law, pre-algebra

Topic
Mathematics Education

Link: https://ifory.id/abstract/XmpR8bkyr4zV

Corresponding Author
Nurma Lestari

Institutions
a) Master of Mathematics Education, Sriwijaya University, Komplek Unsri, Jl. Srijaya Negara, Bukit Lama, Kec. Ilir Bar. I, Palembang 30137, Indonesia

ratu.ilma[at]yahoo.com

b) Master of Mathematics Education, Sriwijaya University, Komplek Unsri, Jl. Srijaya Negara, Bukit Lama, Kec. Ilir Bar. I, Palembang 30137, Indonesia

Abstract
This research aims to generate the mathematical problems of the PISA model using the context of Palembang with the help of video which valid and practical and has a potential effect on the ability of student-s mathematics literacy. The context used are ampera bridge and light rail transit. Their content are shape and space; and uncertainty and data. The research subjects were 10th class in senior high school students. The methodology used is the design research of type development studies, with 2 stages namely, preliminary and formative evaluation. At the preliminary stage, curriculum analysis, PISA framework, research subject and instrument making problem. Formative evaluation stages include self-evaluation, expert reviews and one-to-one, small group, and field test. The data collection techniques used are documentation, walk through, tests, observations, and interviews. This research has resulted in the mathematical problems of the PISA model using the context of Palembang with the help of video which valid and practical, and has a potential effect. Valid as seen from the validator assessment results based on content, construction, and language as well as student-s work in one-to-one phases. Practically seen from the students answers at the small group stage where students can understand the intent of the question. The potential effect is obtained from the students answers at the test field. Based on the analysis of student answers, the mathematical literacy skills that emerge are 72,72% communication skill; 93,93% mathematical skill; 96,97% representation skill; 72,72%reasoning and argument skill; 96,97% choose strategies to solve problems skill; 69,69% using symbolic, formal, and technical languages skill; and 100% use mathematical tools skill.

Keywords
PISA, Palembang, , Mathematical Literacy

Topic
Mathematics Education

Link: https://ifory.id/abstract/jbkRFrxzPtD6

Corresponding Author
Gida Kadarisma

Institutions
a)Department of Mathematics Education , IKIP Siliwangi
jalan terusan jendral sudirman Cimahi 40526, Indonesia
*gidakadarisma[at]ikipsiliwangi.ac.id

Abstract
Content Knowledge and pedagogical knowledge are two most important aspects of teaching. Therefore this research is motivated by the importance of pedagogical content knowledge for pre-service teacher students. The purpose of this study is to analyze PCK that is owned by pre-service teachers when teaching quadrilateral material. The method of this study is a qualitative carried out to obtain in-depth picture of the pre-service teachers PCK in the process of learning activities. The sample of this study is taken by 3 students of mathematics teacher candidates in IKIP SIliwangi conducting field practice in a junior high School in Cimahi. The instruments of this study are in the form of questionnaires and observation sheets to analyze PCK of teacher candidates, pre-learning questionnaires are used to analyze pre-service teachers in making learning plans as many as 6 indicators, and questionnaires in-learning are used to analyze PCK of teacher candidates in delivering material, mastering concepts and choosing methods in line with 20 Indicators. Based on the data analysis, it was found that the PCK of pre-service teacher students in the quadrilateral material belonged to the classification good enough in developing strategies, making lesson plans, in the learning process and mastery of concepts.

Keywords
pedagogical content knowledge, Preservice Mathematics Teachers

Topic
Mathematics Education

Link: https://ifory.id/abstract/nrENcLmG6q3T

Corresponding Author
Martin Bernard

Institutions
a) Fakultas Ilmu Pendidikan, Institut Keguruan Ilmu Pendidikan Siliwangi, Jalan Terusan Jenderal Sudirman, Cimahi 40526, Indonesia
*sukmamurni19[at]gmail.com
b) Fakultas Pendidikan Matematika dan Sains, Jalan Terusan Jenderal Sudirman, Cimahi 40526, Indonesia

Abstract
This study aims to examine the mathematical thinking ability of PGSD students in terms of Creativity Quotient by making props based on VBA Ms. Excel. The method used in this study is a qualitative method carried out in one of the Universities in the City of Cimahi. Data collection was collected using the results of props products, questionnaires and interviews for mathematical creative thinking ability in terms of Creativity Quotient in learning by making props based on VBA Ms. Excel. Based on data analysis, students mathematical creative thinking ability are better than before in learning by making props based on VBA Ms. Excel this. The overall student response in terms of Creativity Quotient shows that almost all students said they were very happy with learning to make props based on VBA Ms. Excel, because they practice their creative thinking ability, they are more active and creative in following the stages of learning provided so as to lead to high learning motivation.

Keywords
Mathematical Creative Thinking, Creativity Quotient, and Ms. VBA Excel.

Topic
Mathematics Education

Link: https://ifory.id/abstract/rNZ7YjkGWFBf

Corresponding Author
Yeni Widiastuti

Institutions
a) Master of Mathematics Education, Sriwijaya University,
Jalan Srijaya Negara, Bukit Besar, Ilir Barat I, Bukit Lama, Kota Palembang, 30128, Indonesia

ratu.ilma[at]yahoo.com
b) Master of Mathematics Education, Sriwijaya University,
Jalan Srijaya Negara, Bukit Besar, Ilir Barat I, Bukit Lama, Kota Palembang, 30128, Indonesia

Abstract
This study aims to develop a set of valid and practical of PISA-like mathematics using transportation context, and to know the potential effects of the developed PISA-like mathematics problems to the ability of the tenth-grade students- mathematical literacy. The PISA-like mathematics problem developed using Design Research type development studies. There are two stages procedure of this study, preliminary stage and formative evaluation stage. The subject of this study were 10th-grade students of Srijaya Negara Senior High School. The data collection techniques used were walkthrough, interview, test and documentation. Based on the result of this study, it can be concluded that there are a set of valid and practical PISA-like mathematics problems using transportation context, and the potential effects be obtained from the result of students- answer at field test stage. Based on the analysis, there are 3 of 34 students use communication; mathematization; representation, devining strategies to solve problems; using symbolic, formal, and technical languages, 28 of 34 students, using communication ability only, and 2 of 34 students can-t use any ability when solving the problem.

Keywords
PISA-like Mathematics Problems, Change and Relationships, Transportation

Topic
Mathematics Education

Link: https://ifory.id/abstract/ABN8JV6kb9Tf

Corresponding Author
osi mitari

Institutions
Sriwijaya University

Abstract
Challenges for developing countries must certainly have students with high mathematical literacy abilities. The fact was Indonesian students in PISA math rankings are still not good, it because the low mathematical literacy abilities of students. This article aimed to know the potential effects of PISA mathematics problems on students mathematical literacy abilities. The method in this study used a design research type of development study with the preliminary and formative evaluation stages. The evaluation flow at the prototyping stage was a formative study including the self-evaluation stage, expert review and one-to-one, small group, and field test. In this article, the discussion of the study was about the results of students- answers in the field test stage, questions that have potential effects that give rise to mathematical literacy abilities namely communication ability, mathematical ability, representation ability, reasoning and argument ability, choose strategies to problem solving ability, and use language and symbolic, formal and technical operation ability. With the dominant ability was communication ability.

Keywords
Design Research, Mathematical Literacy, PISA, PMRI

Topic
Mathematics Education

Link: https://ifory.id/abstract/8bB7qu9XCdcH

Corresponding Author
Kiki Nia Sania Effendi

Institutions
a) Prodi Pendidikan Matematika Universitas Singaperbangsa Karawang
b) Prodi Pendidikan Matematika Universitas Sriwijaya Palembang
c) Prodi Pendidikan Matematika Universitas Pasundan Bandung

Abstract
This article discusses the results of the development research in the field test phase of reading text for School Literacy Movement in mathematics learning. This research is a development research with design research method using development studies type. The evaluation flow at the prototyping stage uses the formative study flow with the self-evaluation, expert review, one-to-one, small group, and field test stages. The research subject was 7th grade students at a junior high school in Karawang. The data was collected by documentation, questionnaires, tests and interviews. The results of the calculation of size effects indicate an effect of 2,895 with high interpretation. Conclusions obtained from the results of product data analysis in the form of reading text for School Literacy Movements in the learning phase that have potential effect for students in mathematics learning.

Keywords
School Literacy Movements; futsal; mathematics learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/8HgKmr2nuDAC

Corresponding Author
Hanifah M. Kom

Institutions
Pendidikan Matematika FKIP UNIB

Abstract
ABSTRACT The APOS Model is a Mathematical Learning Model Based on Theory: Action, Process, Object, and Schema (APOS). The APOS Model is a refinement of the Calculus Learning Model Based on APOS Theory. The APOS Model has syntax with phases: Orientation, Practicum, Small Group Discussion, Class Discussion, Exercise or Evaluation. Development of SWSbased on APOS Model assisted on Geogebra in the subject of Riemann Sum developed using Plomp (2013) design which consists of three stages: 1) preliminary research, 2) prototyping phase, and 3) assessment phase. The purpose of this research was to find out how practicality of SWS was being developed, and how the criteria of practicing SWS based on the APOS Model assisted by Geogebra in the Riemann Sum discussion topic. The instrument used to collect data was the SWS practicality instrument in the form of a Likert scale. Research subjects were: one-to-one test conducted by a lecturer, a teacher, 3 senior students. Small group test by 3 groups of senior students with 3 students in each group. Large group test by 35 students in class B on the 3rd semester of Mathematics Study Program Faculty of Teacher Training and Education University of Bengkulu. After processing the data, the average score of practicality test of SWS was: one to one trial = 82,5%; according to the small group test = 77.63%; according to the large group test = 67,5%. The average value of practicality of SWS by users was 75,862% and belongs to the practical category.

Keywords
APOS Model, APOS Model Syntax, Practicality of SWS

Topic
Mathematics Education

Link: https://ifory.id/abstract/XNKLhTxJfMrd

Corresponding Author
Hanifah M. Kom

Institutions
Pendidikan Matematika FKIP UNIB

Abstract
ABSTRACT The APOS Model is a Mathematical Learning Model Based on Theory: Action, Process, Object, and Schema (APOS). The APOS Model is a refinement of the Calculus Learning Model Based on APOS Theory. The APOS Model has syntax with phases: Orientation, Practicum, Small Group Discussion, Class Discussion, Exercise or Evaluation. Development of SWSbased on APOS Model assisted on Geogebra in the subject of Riemann Sum developed using Plomp (2013) design which consists of three stages: 1) preliminary research, 2) prototyping phase, and 3) assessment phase. The purpose of this research was to find out how practicality of SWS was being developed, and how the criteria of practicing SWS based on the APOS Model assisted by Geogebra in the Riemann Sum discussion topic. The instrument used to collect data was the SWS practicality instrument in the form of a Likert scale. Research subjects were: one-to-one test conducted by a lecturer, a teacher, 3 senior students. Small group test by 3 groups of senior students with 3 students in each group. Large group test by 30 students in class B on the 3rd semester of Mathematics Study Program Faculty of Teacher Training and Education University of Bengkulu. After processing the data, the average score of practicality test of SWS was: one to one trial = 82,5%; according to the small group test = 77.63%; according to the large group test = 79.0%. The average value of practicality of SWS by users was 79,71 and belongs to the practical category.

Keywords
Keywords: APOS Model, APOS Model Syntax, Practicality of SWS.

Topic
Mathematics Education

Link: https://ifory.id/abstract/TyqCv843whrZ

Corresponding Author
Indah Widiati

Institutions
(a*) Universitas Islam Riau
Jl. Kaharudin Nasution No 113 Pekanbaru-Riau

(b) Universitas Pendidikan Indonesia
Jl. DR. Setiabudi no 29 Bandung-Jawa Barat

Abstract
. Students of prospective mathematics teachers often design mathematical test instruments based on the questions contained in the mathematics textbook. The question can be modified or directly using the existing problem. This certainly does not train students creativity in designing mathematical test instruments, especially about applications in the social, economic and environmental fields. This study aims to analyze the creativity of prospective mathematics teachers in designing mathematical test instruments. This research was carried out qualitatively a type of phenomenology with 5 respondents namely students of prospective mathematics teachers. Based on the results of in-depth interviews and documentation of mathematical test instrument designs by prospective mathematics teacher students, the results showed that prospective mathematics teacher students had difficulty in designing application problems in the environmental field. This is because students are not used to designing application questions. For social and economic aspects, some students are able to design the problem but the problems given are limited to using examples in the social and economic fields without incorporating elements of character values in them.

Keywords
Pre-Service Mathematics Teachers, Creativity, Social, Economic, Environment

Topic
Mathematics Education

Link: https://ifory.id/abstract/hURCAjNKBb4f

Corresponding Author
Yuli FITRIANTI

Institutions
a) Department of Mathematics Education Raden Fatah State Islamic University of Palembang, Indonesia
*yulifitrianti_uin[at]radenfatah.ac.id
b) Department of Mathematics Education, Universitas Pendidikan Indonesia
c) Department of Mathematics Education, Universitas Pendidikan Indonesia

Abstract
Divisibility concept is fundamental to the development of another concept in elementary number theory. A study of the construction of the divisibility advanced mathematics teacher was done to provide empirical evidence of early genetic decomposition design. Through the question, we designed in the form of test sheets and interview, we explorer the construction of 3 students. The result of this qualitative study illustrated that construction of the divisibility concept on the problem solving of number theory represented in algebra.

Keywords
Divisibility Concept, construction, APOS Theory

Topic
Mathematics Education

Link: https://ifory.id/abstract/GhnktLFArwDT

Corresponding Author
Tri Nopriana

Institutions
(a,b) Pendidikan Matematika, Universitas Swadaya Gunung Djati, Jl. Perjuangan No. 01, Cirebon 45131, Indonesia

*trinopriana[at]unswagati.ac.id

Abstract
Good candidates for mathematics teachers are those who have good thinking skills especially in mathematics, good habits of mind and the ability to survive under pressure. Those skills are reflected in the level of geometric thinking, the level of logical thinking, the scale of habits of mind and resilience in mathematics. The purposes of this study were to analyze the achievement of the level of geometric thinking, the level of logical thinking of pre-service mathematics teachers, describe the habits of mind and student resilience in mathematics. The research subjects consisted of 30 mathematics education students at FKIP Swadaya Gunung Djati University (UGJ) as pre-service mathematics teachers who would practice by teaching in schools. The instruments in this study were: (1) van Hieles geometrical thinking test developed by The Cognitive Development and Achievement in the Secondary School Geometry Project (CDASSG), (2) the logical thinking test (TOLT) designed by Tobin and Capie, (3) The Habits of Minds Scale, and (4) Mathematical Resilience Scale with 4 categories of Likert models. The results of the study were that pre-service mathematics teachers achieved: (1) the level of van Hieles geometrical thinking at the stage of informal deduction, (2) the level of logical thinking at the formal thinking stage, meaning pre-service mathematics teachers were able to solve problems related to proportional reasoning, variable reasoning, correlational reasoning, and combinatorial reasoning. Furthermore, on the soft skills, pre-service mathematics teachers have (3) habits of mind in the good category with an average achievement of 74.5%, this is also seen in achievement (4) the resilience in mathematics who have a good category with an average achievement of 73.6%. Based on the results of the study, it can be concluded that overall the pre-service mathematics teachers in FKIP UGJ have good abilities in geometrical and logical thinking, the habits of mind and resilience in facing mathematical problems.

Keywords
van hiele gemetric thinking, logical thinking, habits of mind, resilience in mathematics.

Topic
Mathematics Education

Link: https://ifory.id/abstract/zNZuARqF8xeD

Corresponding Author
Tri Nopriana

Institutions
Universitas Swadaya Gunung Djati

Abstract
Good candidates for mathematics teachers are those who have good thinking skills especially in mathematics, good habits of mind and the ability to survive under pressure. Those skills are reflected in the level of geometric thinking, the level of logical thinking, the scale of habits of mind and resilience in mathematics. The purposes of this study were to analyze the achievement of the level of geometric thinking, the level of logical thinking of pre-service mathematics teachers, describe the habits of mind and student resilience in mathematics. The research subjects consisted of 30 mathematics education students at FKIP Swadaya Gunung Djati University (UGJ) as pre-service mathematics teachers who would practice by teaching in schools. The instruments in this study were: (1) van Hieles geometrical thinking test developed by The Cognitive Development and Achievement in the Secondary School Geometry Project (CDASSG), (2) the logical thinking test (TOLT) designed by Tobin and Capie, (3) The Habits of Minds Scale, and (4) Mathematical Resilience Scale with 4 categories of Likert models. The results of the study were that pre-service mathematics teachers achieved: (1) the level of van Hieles geometrical thinking at the stage of informal deduction, (2) the level of logical thinking at the formal thinking stage, meaning pre-service mathematics teachers were able to solve problems related to proportional reasoning, variable reasoning, correlational reasoning, and combinatorial reasoning. Furthermore, on the soft skills, pre-service mathematics teachers have (3) habits of mind in the good category with an average achievement of 74.5%, this is also seen in achievement (4) the resilience in mathematics who have a good category with an average achievement of 73.6%. Based on the results of the study, it can be concluded that overall the pre-service mathematics teachers in FKIP UGJ have good abilities in geometrical and logical thinking, the habits of mind and resilience in facing mathematical problems.

Keywords
Van Hieles Geometry Thinking, Logical Thinking, Habits of Mind, Resilience in Mathematics

Topic
Mathematics Education

Link: https://ifory.id/abstract/7XjMLedZaAm6

Corresponding Author
Al Jupri

Institutions
Departemen Pendidikan Matematika, FPMIPA, Universitas Pendidikan Indonesia

Abstract
This research aims to predict grade VIII students- thinking for the learning of system of linear equations in two variables. To achieve this, first, we surveyed algebra education literature and Indonesian school mathematics textbooks for collecting information about a learning sequence for the topic of system of linear equations in two variables. Second, based on the first step, we designed a sequence of learning for this topic according to the theory of realistic mathematics education and made predictions about student thinking process particularly on solving relevant problems in this topic. The results consisted of a sequence of algebra tasks and various predictions of student thinking for learning algebra. In conclusion, we consider that predictions of student thinking process can be used by the teacher for anticipating the actual learning process either for helping students who encountering difficulties or for teaching actions to invite students problem solving skills.

Keywords
Algebra education, system of linear equations in two variables, hypothetical learning trajectory, design of mathematics learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/G8EJDu3fmx4z

Corresponding Author
Hamdunah Hamdunah

Institutions
Mathematics Education Department, STKIP PGRI Sumatera Barat

Abstract
Learning media is one of the important things to improve the quality of learning. Toward learning media developed in accordance with the student-s needs, a learning can be carried out well. Right now, there is no learning in the statistics course that is in accordance with the needs of the Informatics Education Study Program Students. Based on the background of the problem, the purpose of this study was to analyze the need of STKIP PGRI Sumatra Barat students on learning media of statistical course. It was a Research and Development using the design of Plomp development (Preliminary research, prototyping phase, and assessment phase). The stages carried out were limited to the preliminary research stage. At this stage, the process was conducted by analyzing lesson plan, syllabus, learning resources and student needs analysis towards questionnaire of student-s need and interview instrument towards students and peers, as well as analyzing student characteristics. Those instruments were analysis sheets in the form of questionnaires and interview guidelines. Questionnaires were given to students of the Informatics Education Study Program. Questionnaire and interview data were analyzed qualitatively. The results of the study show that students need a problem-based learning media in a Statistics Course at Informatics Education Study Program of STKIP PGRI Sumatra Barat.

Keywords
Learning media, Statistics, problem-based learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/WPjDbpT2g9CY

Corresponding Author
Bety Miliyawati

Institutions
Universitas Subang

Abstract
This article presents the results of research on how to construct a Problem Based Learning (PBL) model with Didactical Engineering (DE) to enhance students mathematical critical thinking (MCT) ability. This study uses quasi-experimental methods of pretest-posttest. The sample involved 158 eighth grade students from two junior high schools at the high and medium levels in Subang City. The sample for the experimental group and control group was randomly selected on the basis of grades. Instruments used were tests of prior mathematical ability (PMA), MCT ability test, and mathematical disposition. Research data of students- pretest, posttest, and normalized gain scores for MCT. The results showed that there is a significant difference in the enhancement of students- MCT between the experimental and control groups. The enhancement of MCT of the experimental group students who were taught with the PBL model with DE is significantly greater in each category of their PMA both in the schools of the high and medium levels compared to the enhancement of the students who were taught with conventional learning model. In addition, there is no interaction effect between the learning model and the students PMA on the mathematical disposition.

Keywords
PBL model, didactical engineering, mathematical critical thinking ability, mathematical disposition

Topic
Mathematics Education

Link: https://ifory.id/abstract/XWb8YKxj62BC

Corresponding Author
novianti mandasari

Institutions
STKIP PGRI Lubuklinggau

Abstract
The ability of reasoning is very important to note for being able to train students to think activity able to complete math problems.This ability also became a benchmark in determining the student achievement in mathematics, one of them is in the international TIMSS and PISA. However, the ability of competing of Indonesian students is still very low compared to other countries. This can be due to the lack of giving questions that train reasoning abilities by the teacher. Therefore, there is need for improvement in the process of learning mathematics. On the process of learning, students are given the opportunity to explore and to dig up all the potential. The teacher can give problems that are able to train and develop the ability of mathematical reasoning. Problem-based learning is is a learning-centeredissues. Problems can be relate to the real-life of students and can train the ability of skills and complete mathematical problems

Keywords
Problem Based Learning, Reasoning Ability, Mathematics

Topic
Mathematics Education

Link: https://ifory.id/abstract/YhPpTc8jDwJV

Corresponding Author
Winda Ramadianti

Institutions
Universitas Pendidikan Indonesia

Abstract
Fractions is one of the basic topics in mathematics. Knowledge about fraction relates conceptual knowledge and procedural knowledge. Therefore, the instructions about fractions have to consider them. To investigate ways of conceptual knowledge and procedural knowledge at mathematics instruction in junior high school, we observed mathematics instruction in two different classes which were taught by different teachers. This research was conducted at a junior high school in Bengkulu, Indonesia. The results showed that procedural knowledge was discussed more than conceptual knowledge. In addition, the study also found that almost procedural knowledge has not yet been connected with conceptual knowledge.

Keywords
fraction, procedural knowledge, conceptual knowledge

Topic
Mathematics Education

Link: https://ifory.id/abstract/4gkfdLDMzHEQ

Corresponding Author
Sri Yunita Ningsih

Institutions
1Departemen Pendidikan Matematika, Sekolah Pascasarjana Universitas Pendidikan Indonesia, Jl. Dr. SetiaBudhi No. 229, Bandung 40154, Indonesia
2Program Studi Pendidikan Matematika, STKIP Insan Madani Airmolek, Jl. Jenderal Sudirman Tanah Tinggi Airmolek I, Pasir Penyu, Indragiri Hulu, Riau 29352, Indonesia

Abstract
Pedagogical Content Knowledge (PCK) is a blend of understanding teaching material (content knowledge) and understanding of ways to educate (pedagogical knowledge) that need to be possessed by a teacher. The purpose of this study was to find out the profile of the Pedagogical Content Knowledge (PCK) of prospective teacher students, knowing the role of prospective mathematics teacher students towards PCK. This research is a descriptive study that describes the ability of PCK students of mathematics teacher candidates. A teacher in carrying out his professional duties must have competence that is always maintained. Therefore, competency development is an important requirement to ensure that the quality of learning in the class adapts to the development and demands of the times. Competence that is always maintained also ensures that the implementation of education is consistent in achieving educational goals. There are ten PCK criteria that must be possessed by prospective teacher students before practicing in the field. Teacher candidates must also be able to implement learning, knowledge about ways to represent and explain a material to make the material understandable to others.

Keywords
Pedagogical Content Knowledge, Prospective Teacher Students

Topic
Mathematics Education

Link: https://ifory.id/abstract/hTjkdzuL2QFZ