Indonesia Conference Directory

Corresponding Author
Delia Noor Wahidah

Institutions
a) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*delianoor[at]upi.edu
b) Departemen Pendidikan Ilmu Pengetahuan Alam, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Related to face the era of globalization where job competence requires someone who is critical, creative, able to work together and able to communicate, learning does not only lead to the provision of knowledge but training skills become important. We call this skill a 21st-century skill (KA21). The quasi-experiment study with 100 samples taken randomly from 288 populations in one of the high schools in Bandung Regency aims to get an overview of the development of the KA21 through the application of IPjBL with a reading infusion strategy and google classroom. The development of KA21 was measured using the rubric adopted and adapted from the Boss and analyzed using the standard developed by Lati, which has been tested with inter-rater reliability technique with the reability of 0.67. The results of the study show the experimental class critical, creative and collaborative thinking skills can increase to good level and communication skills to excellent levels. In the control class, critical thinking skills and creative thinking skills can increase to good level while collaboration and communication skills increase to excellent levels. The conclusion of this study, learning needs to be developed to get wiser ways to train KA21.

Keywords
21st-century skills; Inquiry-Project Based Learning; Reading infusion; Google classroom

Topic
Physics Education

Link: https://ifory.id/abstract/Eq4JZxgnd2B7

Corresponding Author
Agustiani Putri

Institutions
(a) Department of Mathematics Education, Universitas
Negeri Jakarta, Jl. Rawamangun Muka, Jakarta Timur
3220, Indonesia
agustianiputri15[at]gmail.com
(b) Ph.D of Mathematics Education, Postgraduate
Program, Universitas Negeri Jakarta, Jl. Rawamangun
Muka, Jakarta Timur 13220, Indonesia
(c) Master of Mathematics Education, Graduate Program,
Universitas Negeri Jakarta, Jl. Rawamangun Muka,
Jakarta Timur 13220, Indonesia

Abstract
Generative and Connecting, Organizing, Reflecting, Extending (CORE) are two sets of learning design that can develop learners- critical thinking skill. The objective of this study was to point out the best model to develop learners- critical thinking skill. For this objective, a quasi-experiment was done in 12 Jakarta Senior High School. Two groups of eleventh grades learners were elected by random sampling method. Generative learning was applied to the first group, while CORE learning was applied to the second group. Learners- critical thinking was regulated by the test which produced based on critical thinking skill indicators. Before starting the program, each group took an initial ability test. The program lasted for four weeks, and four hours each week; and at the end of the program post-test works were taken from the candidates. The hypothesis was tested using independent sample t-test with a probability of significance value of 0.05.The results of the research shown that there was a significant difference between the t-test score points of the experimental groups (P<0.05) namely t-count = 3,092 > t-table = 1,667. The results also showed that the average of learners- critical thinking skill points with generative learning model was higher than the other group. It was observed that this paper previously uncovered a role for (1) Barbara L. Grabowski (2014) that generative learning model can increase critical thinking skill and (2) Robert C. Calfee (2004) that CORE can increase critical thinking skill. This manuscript builds on our prior study to compare both models and focus on the effects on critical thinking skill.

Keywords
generative learning model, CORE learning model, critical thinking skill

Topic
Mathematics Education

Link: https://ifory.id/abstract/Ux8WtG63rag4

Corresponding Author
Ratu Mauladaniyati

Institutions
Pascasarjana UPI

Abstract
This study aims to determine whether there are differences in understanding of mathematical concepts between students who get learning with Flipped-Mastery models and students who get conventional learning. This study was a quasi-experimental study with a nonequivalent pretestt posttest control group design. With a population of all class students of SMA N 1 Pandeglang, and the sample was students of MIPA X-4 class as an experimental class and MIPA X-5 class as a control class. The instrument used is a concept understanding test instrument consisting of 8 essay questions. Data analysis using the t-test with a pre-requisite test for normality and homogeneity. The results of the study showed that understanding the mathematical concepts of students who had learned Flipped-Mastery models was better than students who obtained conventional learning.

Keywords
understanding of mathematical concepts, Flipped-Mastery models

Topic
Mathematics Education

Link: https://ifory.id/abstract/DJQLruavbHz6

Corresponding Author
Vivi Angriani

Institutions
Departemen Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia

Abstract
Society is an important part or a central point in sustainable development. To realize sustainable development in a country, a quality society member component is required. One of the sustainable development concentrates on social development, where the application of algebraic literacy is indispensable for individuals for meeting the needs of being a quality society member who is willing to think and solve mathematical problems in daily life. This article reviewed some research that focuses on the mathematical literacy of students, that includes indicators and competencies that indicate that students have algebraic literacy, and factors that affect algebraic literacy skills. The purpose of this article is to describe the importance of algebraic literacy to help people solve mathematical problems in daily life as well as to make the necessary decisions as citizens.

Keywords
Mathematical Literacy, Algebraic Literacy, and Sustainable Development.

Topic
Mathematics Education

Link: https://ifory.id/abstract/RyZvVTHa7zmU

Corresponding Author
Septiani Yugni Maudy

Institutions
Universitas Pendidikan Indonesia

Abstract
Early algebraic thinking was not explicitly mentioned in the elementary school mathematics curriculum in Indonesia. However, whether students are able to develop important algebraic ideas from a general arithmetic perspective through the current curriculum. This study tries to explore the learning experiences of elementary school students and constructs the meaning behind these learning experiences towards the emergence of early algebraic thinking. The researcher analyzes how students construct meaning through in-depth interviews with students in grades IV to VI. The results of this study indicate the fact that certain algebraic ideas must be deliberately reformed in the curriculum since the early grades, because these ideas did not develop naturally in students without proper learning design.

Keywords
curriculum, early algebraic thinking, learning experience, mathematical meaning

Topic
Mathematics Education

Link: https://ifory.id/abstract/qNQAUMkVFcJ2

Corresponding Author
Kamiliyatul Wardiyah

Institutions
1) Prodi S2 Pendidikan Fisika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
2) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract
The purpose of this study was to find out the alternative conceptions of high school students related to concepts in the subject matter of simple electric circuit. The concepts reviewed include the concept of electromotive force (emf), the concept of electric current and the concept of electrical resistance. This research was conducted using quantitative descriptive methods. The number of research subjects was 36 students consisting of 20 female and 16 male, in one of the high schools in the West Bandung district of West Java province. Data were collected by conception test in the form of open essays test related to concepts in the subject matter of simple electric circuit. The results showed that the number of alternative conceptions that high school students had that emerged on each concept were: 1) There were three (3) alternative conceptions that emerged in the concept of electromotive force; 2) There are four (4) alternative conceptions that arise in the concept of electric current, and there are four (4) alternative conceptions on the concept of electrical resistance. These results indicate that the conception that high school students have in relation to concepts in the subject matter of a simple electric circuit still deviates from scientific conception and leads to misconception.

Keywords
Alternative conception, High school students, simple electric circuit matter

Topic
Physics Education

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

Corresponding Author
Annika Maizeli

Institutions
a. Biology Education, STKIP PGRI SUMATERA BARAT, Jalan Gunung Pangilun No. 4 Padang, Indonesia

Abstract
Developed cognitive assessments were validated mid semester test and final semester test by experts where it was categorized into very valid. One-to-One evaluation was conducted to students completed Biology Learning Process and Learning Outcome course ranging in high, medium and low learning outcome. It was to find out the readability level of mid semester test and final semester test. The research aimed to analyze the Indonesian National Qualification Framework - based cognitive assessment readability. It was a descriptive quantitative using data analysis technique called percentage theory. It shows that Indonesian National Qualification Framework - based cognitive assessment readability from questionnaire is reaching 90.38 % and categorized into very high. The score is derived from readability aspects such as easy-to-use aspect 96,15 %, time consuming aspect 74,99 %, and lay-out aspects 100 %. It is concluded that Indonesian National Qualification Framework - based cognitive assessment readability of Biology Learning Process and Learning Outcome course is very high and usable for students to complete the mid semester test and final semester test.

Keywords
readability, mid tes and final test questions, subject evaluation process and Biology learning outcomes

Topic
Biology Education

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

Corresponding Author
Ria Rimfani Musna

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

Abstract
The study was aimed at analysing the students- creative thinking skills at SMP Negeri 2 Bandung, focusing on the fluency, flexibility, originality, and elaboration aspects in solving the flat-side geometry problems. The descriptive type with qualitative approach was used. Tests, interviews, and documentation were utilized as the data collection methods. The students of class VIII-D were chosen as the subject, six of whom were taken as the sample, consisting of two students with high mathematical skills, two moderate, and two low. The findings reveal that the students with high mathematical skills experience no obstacle in the fluency and flexibility aspects, while in the originality aspect the inability to provide creative answers is sill exhibited by some students, and in the elaboration aspect the students represent lack of accuracy and detail in answering the elaborative questions. The moderate mathematical-skilled students still indicate difficulty in understanding the problems given, whereas the low mathematical-skilled students show difficulty in understanding the problems that, therefore, they can merely provide less-structured, unsystematic, undetailed answers, and they do not solve many problems as well. This is due to considerable obstacles they still experience.

Keywords
creative thinking; flat-side geometry

Topic
Mathematics Education

Link: https://ifory.id/abstract/Xtp6nLkhvBjD

Corresponding Author
Rizki Ramadhani

Institutions
a) Program Studi Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
b) Departemen Pendidikan Matematika, Fakultas Pendidikan Matematika dan IPA, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229, Bandung 40154

Abstract
The present study aims to describe mathematical reflective thinking skills of senior high school students according to the problems which examine mathematical reflective thinking skills of integrals subject matter. The descriptive method with qualitative approach was employed. A total of 3 students of grade XI in a senior high school in Banda Aceh City were selected as the subject. The data were collected through a test consisting of mathematical reflective thinking skills problems, interviews and documentation. The indicators of mathematical reflective thinking skills include identifying problems, interpreting problems, evaluating problems, predicting problem-solving, and drawing conclusions. The findings indicate that the students considered at the high level of cognitive skills have not been able to interpret integral-related problems clearly and correctly. The students considered at the medium level of cognitive skills have not been able to interpret and evaluate integral-related problems clearly and correctly. The students considered at the low level of cognitive skills have not been able to interpret, evaluate, predict the solving and draw conclusions regarding integral-related problems clearly and correctly.

Keywords
Reflective Thinking

Topic
Mathematics Education

Link: https://ifory.id/abstract/87GVqHh3zja4

Corresponding Author
Yugi Hilmi

Institutions
a) Magister Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
*yugihilmi[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract
This study aims to describe the level of mathematical creative thinking ability of tenth graders in vector material. The method of this research is descriptive qualitative. The subject of the study involved 34 tenth grade senior high school students in the Tasikmalaya area. Data collection techniques used a written test of four items in the form of descriptions. The data analysis technique is done by giving a score in accordance with the scoring guidelines used and categorizing the criteria for the level of ability of students mathematical creative thinking. The result showed that the majority students mathematical creative thinking ability are at a fairly creative level. Thus, students need to be given learning that can develop their mathematical creative thinking abilities.

Keywords
Creative Thinking Abilities; Vector Material

Topic
Mathematics Education

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

Corresponding Author
Yushilatu Felayati Aziiza

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

Abstract
Abstract. The study aim knows the factors cause the learning outcomes of students unreachable the standard minimum criteria (KKM) on mathematics learning. The method used in this study was qualitative descriptive. The subjects research used the purposive sampling method. Data collection tools are questionnaires about the factors that cause students to unreachable KKM. techniques data analysis uses a percentage formula. The conclusion of this research is the main cause of the students to get the value below KKM on mathematics teaching is the lack of motivation that exists in the students, the skill in learning mathematics is still very low, the health of Students Very influential about the learning process. In addition to the internal factors, there are also external factors, the external factor consists of the teachers and aspects of the parent. Students feel motivated to learn if the teacher uses media or mathematical aids. Another external factor is parents, parents have given cellphones to their children. These two factors cause students not to reach the KKM mathematics learning.

Keywords
Standard minimum criteria, mathematic learning, unreachable

Topic
Mathematics Education

Link: https://ifory.id/abstract/WDh6TPZ4QGKv

Corresponding Author
Tiara Larasati

Institutions
(a) Faculty of Mathematics and Natural Science,
State University of Jakarta
Rawamangun Muka, East Jakarta 13220, Indonesia
tiaralarasati24[at]gmail.com

Abstract
The objective of this study was to observe the effect of Connecting, Organizing, Reflecting, and Extending (CORE) instruction model by work card toward students- mathematical problem-solving skill in Junior High School 1 Klari. The research method was quasi-experiment using non-equivalent post-test control design. All classes in seventh grade become the population. Two-stage sampling technique, namely purposive sampling and cluster random sampling technique, was used to select VII-A as the experimental class who treated with the CORE instruction model by work card and VII-B as the control class who treated with direct instruction model. Students- mathematical problem-solving skill was measured by the test which created based on problem-solving skill indicators. Based on hypothetical testing using independent sample t-test with a significance value of 0.05, the result has shown that there was a significant difference between the experimental and control class. There was t count = 4.6932 > t table = 1.667, then H0 was rejected. This result was indicated that the average of the students- problem-solving skill who using CORE instruction model by work card higher than the average of the students- problem-solving skill who using conventional instruction model. Therefore, it can be concluded that the CORE instruction model by work card affected to students- mathematical problem-solving skill in Junior High School 1 Klari.

Keywords
CORE Instruction Model; Work Card; Mathematical Problem-Solving Skill

Topic
Mathematics Education

Link: https://ifory.id/abstract/2pDRxckHtmfM

Corresponding Author
Savira Rahmah Zakiyyah

Institutions
a) Faculty of Mathematics and Natural Science, State University of Jakarta
Rawamangun Muka, East Jakarta 13220, Indonesia
Savirarahmah17[at]gmail.com

Abstract
Double Loop Problem Solving (DLPS) is one of the learning models that purpose to improve mathematical problem-solving skill. As a DLPS learning model, the constructivism approach is one of the learning approaches that can be applied to improving students mathematical problem-solving skill. The purpose of this study was to determine the effect of applying the DLPS learning model with constructive approaches to students mathematical problem-solving skill. To realize this goal, quasi-experiments was done in 3 South Tambun Senior High School. Two classes were selected using the Cluster Random Sampling method. The DLPS learning model with the constructivism approach is applied to the first class, while conventional learning models are applied to others. Students mathematical problem-solving skill are measured through tests made based on indicators of problem-solving skill. Before starting the program, the initial skill of students is calculated based on the results of the PAS (Final Evaluation). The program was carried out eight meetings, during which the eighth meeting was conducted post-test. The hypothesis was tested using an independent sample t-test with a significant probability of 0.05. The results of the study show that there is a positive influence on the application of the DLPS learning model with the constructivism approach to students mathematical problem-solving skill (p-value <0.05). The results showed that the average test results of students mathematical problem-solving skill with the DLPS learning model with the constructivism approach were higher than those of students with conventional learning models. This research is in line with the research conducted by (1) Jatisunda M. Gilar (2017) the constructivism approach has a positive influence on students mathematical problem-solving skill. (2) Pratama (2018) DLPS learning model has a positive influence on students mathematical problem-solving skill. This manuscript is based on the research that we have done.

Keywords
Double Loop Problem Solving (DLPS), Constructivism, Problem-Solving

Topic
Mathematics Education

Link: https://ifory.id/abstract/E6DRpVnPzXmT

Corresponding Author
ABDURRAHMAN FUADY

Institutions
1Program Studi Magister Pendidikan Kimia, Sekolah Pasca Sarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

*abdurrahman_fuady[at]upi.edu

2,2 Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
The purpose of this research is to analyze the cognitive competence of grade XI students in learning acid-base titration topic through a Project- Based Learning. This research is conducted in a private high school located in the West of Bandung. The participants consist of 33 grade XI students, 2 Chemistry teachers, and 2 supervisors that are knowledgeable in terms of the Project- based-Learning model. A tool that is used in this research is a written multiple-choice test that has been validated by an advanced professor. Moreover, this research is based on Greivemeijer method as well as Cobb Design- Based Research (DBR) that is made up of 3 phases including: Design initiation, Experiment Design, and Retrospective Analysis. The increase of cognitive competence is calculated using N- gain. Results of the data analysis based on the pre test and post test of the grade XI students from the said private high school regarding the acid and base titration topic, reflects that the Project-Based Learning model allowed an increase in cognitive competence of the students. Students of medium category have an N- gain average of (49,68 %).

Keywords
Cognitive competence, Acid-base titration, Project-based learning

Topic
Chemistry Education

Link: https://ifory.id/abstract/y6wnM2rHPCmj

Corresponding Author
Nurhayati Nurhayati

Institutions
Universitas Pendidikan Indonesia

Abstract
Abstract. This research is a correlational research that aims to obtain an overview of the correlation of mathematical resilience to the mathematical problem solving abilities of senior high school .This research was conducted in SMA Negeri 1 Klari class XI IPA 2 even semester in academic year 2018-2019. The method used is expose facto. The population taken is all student of class XI SMA Negeri 1 Klari. Sampling using purposive sampling technique, which is a determination and sampling technique determined by the researchers with certain considerations. The sample consists of 36 student. The material used is function derivative. The instrument of this research is test item of mathematical problem solving abilitiy as 6 items and scale of mathematical resilience of 40 statements. The conclusion obtained are that student have difficulty in solving mathematical problem solving question and there is a significant correlation between mathematical resilience of students- mathematical problem solving abilities equal to 0,819.

Keywords
Mathematical Resilience, Mathematical Problem Solving Abilities

Topic
Mathematics Education

Link: https://ifory.id/abstract/9N4aGE68mzRk

Corresponding Author
Hanifah Kurnia Muchtar

Institutions
a)Departemen Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia.

b)Departemen Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
The purpose of this study was to produce information about assessment instruments quality to assess chemical literacy of high school students in solution material developed by researcher. Research method used was descriptive with quality parameters tested were empirical validity, reliability, readability, distinguishing power, difficulty level and distractors function. Research participants were 26 high school students class XI in Bandung. Chemical literacy assessment instrument that were tested consisted of 42 multiple choice items, 12 essay items and 26 attitude scale statements. Study results showed: (1)Empirical validity values of multiple choice questions, essays and attitude scale respectively in range 0.11-0.87, 0.4-0.8, 0.1-0.74; (2)Reliability values for multiple choice questions, essays and attitude scales respectively 0.93, 0.87, 0.94; (3)Readability test scores for multiple choice questions, essays and attitude scales respectively 97%, 99%, 100%; (4)Results of distinguishing power test for multiple choice questions and essays were in range 0.07-0.85, 0.3-0.8; (5)Difficulty level test results for multiple choice questions were 16% difficult category, 61% moderate category, and 23% easy category while for essay questions were 9% difficult category, 75% moderate category, and 16% easy category; (6)Distractor function test results for multiple choice questions were distractors of 12 questions that need to be fixed.

Keywords
Chemical literacy assessment instruments; Difficulty level; Distinguishing power; Distractors function; Empirical validity; Readability; Reliability

Topic
Chemistry Education

Link: https://ifory.id/abstract/FXCUgKEzkmq7

Corresponding Author
Deti Ahmatika

Institutions
1) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*dheti.ah0502[at]upi.edu
2)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
3)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
This study aims to describe the process of creative thinking of students based on the Wallas model. This study has research qualitative descriptive using triangulation data. Subjects were categorized as high, moderate, and low ability after being given a test of creative thinking ability. The object of this research is the existence of how junior high school students solve mathematical problems. Data were analyzed through the classification of representations, and conclusions. The results showed that 1) there were 20% of students who did not complete and only reached the preparation stage, called the low category group; 2) there are 53.33% of students reaching the illumination stage even though to arrive at this stage students need a long time, called the medium category group; and 3) 26.67% of students have completed the verification phase, called the high category group. For students with low and medium ability categories, they still need assistance when experiencing obstacles in their creative thinking process, while high ability students need enrichment material.

Keywords
Creative Thingking Process, Problem of Mathematics

Topic
Mathematics Education

Link: https://ifory.id/abstract/Y4dvNarDnquX

Corresponding Author
Irfan Rifqi Maula

Institutions
a) Pendidikan Biologi, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
*irfanrifqimaula[at]student.upi.edu
b) Departemen Pendidikan Biologi, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia

Abstract
One of the abilities of the 21st century that students must have is creativity, but this ability is not too meaningful if it is not accompanied by a good spiritual attitude (in accordance with the 2013 curriculum in Indonesia), as well as always being a concern for public schools research is rarely focused on religious-based schools (madrasah) even though the potential is no less great than public schools. So from that the aim of this study is to analyze the creativity and spiritual attitudes of students who appear in STEM-based reproductive system learning through performance assessment. The research methodology is descriptive, sample used was one of 11th grade classes in “Science” specialization in MAN 2 Tasikmalaya with 36 students as participants. Creativity here is seen from a creative person (Person), the creative process (Process), the pressure that arises (Press), and the product it produces (Product). The results of the research show that the students of madrasah (in this case MAN 2 Tasikmalaya) have different levels of creativity, both compared in terms of "person", "process", "press", and "product" no one has a level of creativity same. On average students have "emerging" category creativity. Creativity is also not directly related to students personal spiritual attitudes, however, some students who have very good spiritual attitudes tend to have creativity that is categorized as "expressing".

Keywords
Creativity; Spiritual Attitudes; STEM-based Learning; Reproductive System; Performance Assessment

Topic
STEM Education

Link: https://ifory.id/abstract/GEtu72RbcxaN

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
Knowing students difficulties in using the concept of division and divisibility is one of the basic needs to design genetic decomposition of that concept. This article is a report from qualitative research that discusses conceptual issues about the idea of division and divisibility given by prospective mathematics teacher students who use the APOS theory. The data for the study were collected from an interview conducted on 3 pre-service mathematics teachers in their second year and who have attended and completed a test on the division and divisibility in an elementary number theory course. These participants were selected based on their performance in the test. However, the interview conducted showed that there are five difficulties involved and they include solving the divisibility problem on integers, algebraic manipulation and structure sense, distinguishing between variables and parameters on division problem presented in algebraic expression, associating between division algorithm and definition, and application of divisibility properties and theorems.

Keywords
Difficulties, Division Concept, Divisibility Concept, APOS Theory

Topic
Mathematics Education

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

Corresponding Author
Ovi Syafiatul Maulana

Institutions
a) Program Magister Pendidikan Biologi, Universitas Pendidikan Biologi
*ovisyafiatulmaula[at]gmail.com
b) Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229 Bandung, 40154, West Java, Indonesia

Abstract
This study aimed to analyze the ecoliteracy of high school students at Darul Hikam Bandung dormitory based on gender through the value education of Taqwa Character Building (TCB) toward environment. This research is motivated by the low awareness and concern of students about the surrounding environment. Taqwa Character Building (TCB) is designed as value education to form a character of taqwa integrated into student activities. Data analyzed used quantitative approach with descriptive research methods. This study were conducted at 20 males and 20 females who lived in the Dormitory. Data were collected using questionnaire, interviews and documentation. A questionnaire of ecoliteracy was given to examine environmental knowledge and environmental behavior. Males obtained a higher average score than females, which is 3.46 with a medium category, while the females is 3.38 with the medium category. This analysis revealed very few gender-based differences ecoliteracy. The majority of males and females delegates have good knowledge of various aspects related to ecoliteracy as a manifestation of the integration of education in TCB values in daily activities of students.

Keywords
ecoliteracy; Darul Hikam dormitory; gender; TCB

Topic
Biology Education

Link: https://ifory.id/abstract/YGZ84gxEDL3q

Corresponding Author
Rima Rohimah Fauziyah

Institutions
(a) Departemen Pendidikan Dasar, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia.
*rimarohimah16[at]upi.edu
(b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia.

Abstract
This research is motivated by the importance of communication ability and mathematical representations of elementary school students as part of the standard process that students must have towards mathematical learning. The purpose of this study was to determine how far the communication and mathematical representations of students have. The research design used was descriptive qualitative. This research was conducted on 24 students of fifth grade elementary school in Bandung by providing communication skills and mathematical representation tests and interviews. The results of the study showed the low communication skills and mathematical representations of students in terms of the test instruments given to students. Most students find it difficult to draw conclusions because of errors in understanding the meaning of mathematical questions in real life contexts. Based on these findings learning activities must be developed to achieve the expected indicators so that communication ability and mathematical representations of students can be improved.

Keywords
Mathematical communication ability; Mathematical representation ability; Elementary School

Topic
Mathematics Education

Link: https://ifory.id/abstract/QLVnPmeFhyp6

Corresponding Author
Indah Pertiwi

Institutions
a) Departemen Pendidikan Dasar, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No.229 Bandung 40154, Indonesia
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No.229 Bandung, 40154, Indonesia

Abstract
This study is based on the importance of elementary student-s mathematical connection and communication. The aim of this study was to find out the student-s ability to apply mathematical concepts on problems that arise in each learning. The study design used was descriptive qualitative. The samples in this study were 22 fourth grade students of an elementary school in Subang. This study uses mathematical connection ability tests instrument and a mathematical communication ability tests instrument. The results obtained that students in answering the mathematical connection ability tests and mathematical communication test still low. Some students difficult and confuse when answering test because students do not understand the purpose of the question. Based on these problems, learning will be further developed so that mathematical connection and mathematical communication ability can be improved again.

Keywords
mathematical connection, communication ability, elementary students

Topic
Mathematics Education

Link: https://ifory.id/abstract/M9hnNy7BZzH2

Corresponding Author
neng fuzia afrianti

Institutions
a) Departemen Pendidikan Dasar, Universitas Pendidikan Indonesia,Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia.
*nengfuzia11[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia. Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia.

Abstract
Mathematics is a compulsory subject that students must learn since on elementary school, because of its usefulness on daily lives. But many obstacles experienced by students in learning mathematics, one of which is mathematical anxiety. This study aims- to explain how students mathematical anxiety is seen from gender factors and their implications. The subjects of this study were 10 grade V students of an elementary school in Sumedang. Case study methods are used to understand and analyze students mathematical anxiety. The results of the study were obtained from data collected through questionnaires, mathematics test, interviews and the field notes of mathematics learning process which was then analyzed descriptively. The research results show that mathematical anxiety of female students tended to be higher when compared to male. This mathematical anxiety will increase when students face exams. The implication is that the concentration of students with a high level of math anxiety tends to be disturbed when learning mathematical material. Although this doesn-t always have an impact on the results of student learning tests, but the conditions of learning must be arranged in such a way that students are more comfortable and mathematics anxiety can be reduced while students studying.

Keywords
mathematics anxiety; gender;

Topic
Mathematics Education

Link: https://ifory.id/abstract/d2Lyh483pvRj

Corresponding Author
Sufyani Prabawanto

Institutions
a) Departemen Pendidikan Dasar, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*nengfuzia11[at]upi.edu *sufyani[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
In the Education curriculum, mathematics is a compulsory subject that must be learned by students since elementary school, because of its usefulness for students daily lives. But many obstacles experienced by students in learning mathematics, one of which is mathematical anxiety. So, this study aims to explain how students- mathematical anxiety is viewed from gender factors and its implications. The subjects of this study were 10 students of 5 graders, an elementary school in Sumedang. Case study method is used to understand and analyze students- mathematics anxiety. The results of the study were obtained from data collected through questionnaires, interviews and field notes when the mathematics learning process took place which was then analyzed descriptively. During the study it was observed that mathematical anxiety of female students tended to be higher when compared to male students. This mathematics anxiety will increase as students face exams. The implication of students with high levels of mathematics anxiety tends to be distracted by their concentration in learning mathematical material. This then has an impact on the acquisition of student learning outcomes that are less than optimal. Thus the lower the level of students- mathematical anxiety, the higher the mastery of students mathematical concepts.

Keywords
Mathematical Anxiety; Gender

Topic
Mathematics Education

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

Corresponding Author
Nurma Yunita Indriyanti

Institutions
Chemistry Education Department, Universitas Sebelas Maret

Abstract
This study aims to: (1) have a profile of students scientific reasoning of high school students in science program; (2) to investigate the relation of students scientific reasoning ability with understanding of chemical triangle representation of students on salt hydrolysis topic of grade science program in High School. This research used descriptive qualitative method. In this research, there are five levels of scientific reasoning: level No Response, Non-normative, General Descriptive, Bronsted Mechanistic and Bronsted Causal. Students scientific reasoning was measured using open-ended test. The determination of each level was determined by two ratters using the Cohen-s Kappa formula, in which the results of reliability for scientific reasoning, 0.95. Participants of this study as many as ninety 10th grade students in one public high school in Surakarta, Indonesia. Data collection techniques include written test, observations and interviews. Based on the results of the study showed that, (1) Profile of students scientific reasoning at General Descriptive level of 40%, Non-normative level of 33%, Bronsted Causal level of 26%, Response level of 1% and Bronsted Mechanistic level of 0%. The most of students have General Descriptive level, where the students- answer is only at the "What" stage hydrolysis occurs in general or using Bronsted-lowry theory. (2) not all levels of scientific reasoning have a understanding of the overall triangle representation (M-SM-S), but the understanding the overall chemical triangle representation (M-SM-S) can inducing good scientific reasoning.

Keywords
scientific reasoning, high school students, chemistry representation

Topic
Chemistry Education

Link: https://ifory.id/abstract/ykAbN9GM2g8v

Corresponding Author
Khuzniyyatus Saadah

Institutions
a) Pendidikan Matematika, Program Pascasarjana Universitas Lampung, Jl. Prof. Dr. Sumantri Brojonegoro No. 1 Bandar Lampung 35141, Indonesia
*m.nduz[at]yahoo.com
b) Departemen Pendidikan Matematika, Universitas Lampung, Jl. Prof. Dr. Sumantri Brojonegoro No.1 Bandar Lampung 35141, Indonesia

Abstract
This research is aimed to describe reflective thinking ability of Junior High School Student in Solid Figure Problem Solving Viewed from Gender Differences. The method used in this research is descriptive research. The subjects of this research involved 20 students of MTs Guppi South Lampung consisting of 10 male students and 10 female students. To collect data, this research administers an essay test that assesses students- reflektive thinking ability based on three indicators, stages of reacting, comparing, and contemplating. The test data is then used to analyze students reflective thinking skills qualitatively. The results showed that 1) Female students were able to fulfill the reacting stage indicators on three questions, comparing on three questions, and contemplating on two questions. 2) male students are able to fulfill the reacting stage indicator on three questions, comparing on two questions, and contemplating on one question. 3) female students meet the comparing and contemplating stages more than men. So that the ability of reflective thinking of female students is higher than that of male students.

Keywords
reflektive thinking, gender differences

Topic
Mathematics Education

Link: https://ifory.id/abstract/e6ETCjMgVWZJ

Corresponding Author
agil isma maula

Institutions
a) Pendidikan Matematika, Program Pascasarjana Universitas Lampung, Jl. Prof. Dr. Sumantri Brojonegoro No. 1 Bandar Lampung 35141, Indonesia
*m.nduz[at]yahoo.com
b) Departemen Pendidikan Matematika, Universitas Lampung, Jl. Prof. Dr. Sumantri Brojonegoro No.1 Bandar Lampung 35141, Indonesia

Abstract
This research is aimed to describe reflective thinking ability of Junior High School Student in solving geometry problems viewed from Gender Differences. The method used in this research is descriptive research. The subjects of this research involved 20 students of MTs Guppi South Lampung consisting of 10 male students and 10 female students. To collect data, this research administers an essay test that assesses students- reflektive thinking ability based on three indicators, stages of reacting, comparing, and contemplating. The test data is then used to analyze students reflective thinking skills qualitatively. The results showed that 1) Female students were able to fulfill the reacting stage indicators on three questions, comparing on three questions, and contemplating on two questions. 2) male students are able to fulfill the reacting stage indicator on three questions, comparing on two questions, and contemplating on one question. 3) female students meet the comparing and contemplating stages more than men. Therefore that the ability of reflective thinking of female students is higher than that of male students.

Keywords
reflective thinking, gender differences

Topic
Mathematics Education

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

Corresponding Author
Muh Khaedir Lutfi

Institutions
a) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*khaedir.mkl[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
One of the mathematical topics that must be mastered by students is geometry. Geometry requires students to think analytically and spatially so they must have good spatial abilities. Each student has different spatial abilities in learning geometry. Several previous studies relating to spatial ability are about differences in students- spatial abilities based on gender. However, almost no research can be found on the students-s spatial abilities based on level of geometrical thinking. This condition raises research questions about description of students-s spatial abilities based on Van Hieles level of geometrical thinking. Therefore this study aims to identify students-s spatial abilities based on Van Hieles level of geometrical thinking. To answer the research question, we gave a written test to 25 grade IX students in one of junior high school in Bandung. Then, we conducted interviews to 3 upper group students and 3 lower group students. Data analysis was done by triangulation method. The results of this study indicated that there are variations in differences in each indicator of spatial ability based on the level of Van Hieles geometrical thinking. In the spatial perception, mental rotation, and spatial orientation, the maximum level achieved by students is level 2, namely 11, 5, and 3 students, respectively. Meanwhile the indicator of visualization and spatial relation, the maximum level achieved by students are level 1, namely 16 and 15 students, respectively.

Keywords
Geometry; Spatial ability; Level of Van Hieles Geometrical Thinking

Topic
Mathematics Education

Link: https://ifory.id/abstract/xh3wApNXfErQ

Corresponding Author
Ariestha Widyastuty Bustan

Institutions
a)b) Faculty of Mathematics and Natural Sciences, Mathematics Department, Universitas Pasifik Morotai, Jl Siswa Darame, Pulau Morotai, Maluku Utara

Abstract
This study aims to find out how the learning process of mathematics in disabilities of unsociable and slow learners which involved teacher preparation before the learning process, implementation of learning and follow-up evaluation and what are the barriers faced by special needs students during the learning process of mathematics in inclusive class of SMA Negeri 10 Kota Ternate. This research is a qualitative descriptive study. The type of research used is a type of field research with data collection techniques through observation, interviews and documentation. The research subjects in this study were mathematics teachers in inclusive class. The data analysis technique used in this research is data collection, data reduction, data presentation, conclusions, and verification. Data validation uses the time triangulation technique. The results of the study show that several things are as follows: (1) Before mathematics learning process takes place, the subject prepared lesson plan, syllabus, media and learning resources but there was still not specific for special needs students, (2) Subject prepared students psychologically and physically, asked introductory questions and repeats basic mathematics concept. The subject made a group that combined special needs students and normal students in one group, (3) Subject took the initiative to ask directly to special needs students which parts of the material were not yet understood. Especially, basic mathematical concepts for students is done more slowly and often repeated. Special needs students get bored quickly following the mathematics learning process, therefore the teacher maked a group, so special needs students can interact with normal students.

Keywords
Mathematics learning; Inclusive education; Inclusive school; tunalaras; slow leaner

Topic
Mathematics Education

Link: https://ifory.id/abstract/VDpY8WGc7thv

Corresponding Author
Sugama Maskar

Institutions
Universitas Teknokrat Indonesia

Abstract
The aim of this paper is to analyze the national examination scores of mathematics data for senior high school level in Indonesia from 2015 until 2018. Data analysis techniques used in this paper are explorative method with descriptive statistics and inferential statistics to find an overview of students mathematical abilities in Indonesia. The data were obtained from Pusat Penilaian Pendidikan (Puspendik) Kementerian Pendidikan dan Kebudayaan Republik Indonesia. The result shows that the scores of mathematics national examination for language, sains, and social department decreases every year. The results of the two average tests with t test, shows that the decrease in each year is significant, except for 2015 to 2016 on language department. The result also shows that the biggest average for language, sains, and social respectively are 41.60, 54. 41, and 51.76, all from 2015. The conclusion is that the mathematics ability of high school students in Indonesia is still low. The application of the high order thinking skills (HOTS) problem is also one of the factors that affected the decrease in 2018.

Keywords
National Examination, Mathematics

Topic
Mathematics Education

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