bluuebunny/crossref_metadata_2025 huggingface dataset:
The analyze of students’ creative thinking skills on Lesson Study for Learning Community (LSLC) based on Science, Technology, Engineering, and Mathematics (STEM) approach
Authors: Yuniar D , Hobri  , Prihandoko A C , Aini K , Faozi A K A
Published: June 2020

This research was intended to develop mathematics learning tools on Statistics material on the seventh grade of junior high school through Science, Technology, Engineering, Mathematics based on Lesson Study for Learning Community and its effect on the students’ creative thinking ability. The method used was the mixed-methods combining qualitative and quantitative researches. Thiagarajan model as the developmental research was taken as the qualitative one. This research consisted of three classes; two experimental classes and one control class. The experimental design used was non-equivalent control group design. In normality test, the data obtained were normally distributed and the data were proved homogeneous based on the homogeneity test, so that it was necessary to do parametric data analysis by using One-Way ANOVA analysis. Based on the results of this research, the conclusions were summed up into: (1) The development of learning tools were categorized to valid, effective and practical, (2) The application of LSLC-based STEM had a significant effect on the students’ creative thinking ability which was indicated by a significance value of 0.000 (p<0,05).
The influence of mathematics academic potential and learning motivation of Papuan college students in Jember on academic achievement
Authors: Wangguway Y , Albab A U
Published: June 2020

This research aims to find out the influence of mathematics academic potential and learning motivation of Papuan college students in Jember on academic achievement. The population in this research is Papuan college students who study in Jember. Data collection is by using the questionnaire method, test method, and documentation method. The questionnaire method is for collecting data of learning motivation, the test method is for collecting data of mathematics academic potential. Analysis prerequisites in this research are the test of normality, the test of multicollinearity, the test of heteroscedasticity, and the test of autocorrelation by SPSS of 17 versions for Windows. The analysis method used in this research is the t-test of hypothesis testing with a significant level of 2-tails or α ≥ 0,05. The research result shows that mathematics academic potential and learning motivation has a significant effect on the academic achievement of Papuan college students in Jember Regency, East Java.
The students’ mathematical communication skill on caring community-based learning cycle 5E
Authors: Aini K , Hobri  , Prihandoko A C , Yuniar D , Faozi A K A , Asmoni
Published: June 2020

This research aimed to develop the instruments of Mathematics instructional by using caring community-based learning cycle 5E on “Matrix Operations” Learning Material for the eleventh grade students of senior high school as well as to know its effect on the student’s mathematical communication skill. The research method used in this study can be considered as a combination of qualitative and quantitative methods. Qualitative methods are used to obtain data related to the results of the development of learning tools and quantitative methods are used for statistical analysis. The research subjects were the students of SMAN 1 Tegaldlimo, Banyuwangi Regency, from which three classes were chosen as the research samples, class XI MIPA 4 as the control class and class XI MIPA 5 as the first experimental class and class XI MIPA 2 as the second experimental class. Mathematical communication skill was measured by using the essay test. In the normality test, the data obtained were normally distributed and the data were homogeneous based on the homogeneity test, so that it was necessary to do the parametric data analysis by using One-Way ANOVA analysis. The results of the research showed that: (1) the instructional instrument resulted was valid, the implementation of the instructional instrument was practical and effective; (2) the significance value (2-tailed) was 0.000 (p < 0.0-5), which indicated that the application of learning by using caring community-based learning cycle 5E had a significant effect on the student’s mathematical communication skill.
Students’ metacognitive ability in solving quadrilateral problem based on adversity quotient
Authors: Damayanti R , Sunardi  , Yuliati N , Karimah R , Albab A U
Published: June 2020

The purpose of this research is to describe the profile of students metacognitive ability in solving quadrilateral problem based on quitter, camper and climber categories. In this reasearch also discuss about the process of students metacognitive answer in solving quadrilateral problem. This research is as qualitative descriptive research. Subject in this research is students 8th grade SMPN 3 Jember. The subjects consisted of three students, one of them is categorized as quitter category, both of them are categorized as camper category, and fourth of them are categorized as climber category. The data is obtained from the Adversity Respone Profile, quadrilateral problem solving test, think aloud technique, and depth interview. Based on the result of research data analysis, student as quitter category in solving quadrilateral problem haven’t the awareness to solve the problem. They are easily to give up when they face the problem. While students as camper category in solving quadrilateral problem have the awareness to solve problems to find solutions. However, when they have got a solution, students at this category do not want to look for the other solutions. While students as climber category in solving quadrilateral problem have the awareness to solve problems to find solutions and they want to look for the other solutions. Based on this result, it shows that the students with the higher of AQ level then they have the higher problem-solving skills and the higher metacognition ability in solving quadrilateral problem.
The effect of problem based learning model on junior high school students’ higher order thinking skills
Authors: Imamah E N , Sunardi  , Yudianto E , Sari M P , Laily N I
Published: June 2020

The facts indicate that students’ higher order thinking skills at second grade of SMPN 1 Jember is relatively low. They were only learning with assignments in class and did not use theory to solve their problems. Therefore, we conduct a research on mathematical learning through Problem Based Learning model to find out the effect of students’ higher order thinking skills. The method used in this study is a mixed method. The quantitative method is used to analyze student learning achievement and students’ higher order thinking skills.This experimental research have two classes which are control class and experimental class that contain 32 students each class. The result showed that Problem Based Learning model had a positive effect on higher order thingking skills. It can be seen from the percentage of higher order thingking skills of control class was 40,63% and experimental class 90,62%.
The profile of students conceptual understanding and procedural knowledge in solving geometry problems based on van hiele levels
Authors: Laily N I , Sunardi  , Yuliati N , Imamah E N , Sari M P
Published: June 2020

This study aimed to describe the conceptual understanding and procedural knowledge of students in problem solving polyhedral in terms of the level of visualization, analysis and informal deduction and to investigate the correlation between conceptual understanding and procedural knowledge to problem solving. The method used was a mixed method that combines quantitative and qualitative methods. 297 Junior High School students from five different schools in Jember were selected as samples and three students were selected as the subject. That Determine the subject chosen by the van hiele test. The data were collected through tests and interviews. The results of the test van hiele obtained visualization level students as much as 44.5%, students’ level of analysis as much as 34.2%, informal deduction level students as much as 15.5% and 5.8% were classified at the level of pre-visualization. The results of the geometry test show that students at the visualization level meet some indicators of conceptual understanding but none of them meet the indicators of procedural knowledge, students at the level of analysis meet some indicators of conceptual understanding and procedural knowledge, while students with a level of deduction meet all indicators of conceptual understanding and procedural knowledge. The Results of the test showed that the higher the level of geometrical thinking students, the better the conceptual understanding and procedural knowledge.The results also showed that there was a significant relationship between conceptual understanding and procedural knowledge to solving the problem of 82.3% shown by the person correlation coefficient is 0.515 with a confidence level of 95% and a significant level α = 0.05. The better the conceptual understanding and procedural knowledge the better the ability to solve the problem.
Scientific approach learning implementation based on lesson study for learning community in solving sequence and series and its effect to student creative thinking ability
Authors: Guswanto E , Susanto  , Hobri  , Inawati P A , Sya’Roni A R
Published: June 2020

This research aimed to describe the creative thinking of Junior High School students in solving sequence and series. This type of research was mix methode research. This research was conducted on students of SMP AL-AZHAR Muncar Banyuwangi. The data collection method used in this research was test and interview. The instruments used were the researcher itself, creative thinking test, and interview guidelines. Based on data analysis results, it could be concluded that the students could pass creative thinking well. At the illumination stage for all questions given, the student could finish appropriately and clearly. The students could write ideas under their own words so that the students’ creative side had appeared well. At the incubation stage, the students could give many ideas and could explain their ideas fluently and appropriately. Seen from the number of answers, the students’ tended to be similar to what the teacher had taught, however, there was also students’ answer different from the way the teacher taught so that it showed a unique explanation.
Students’ mathematical communication skills of the straight line equation based on gender in junior high school
Authors: Aliyah H , Kusmayadi T A , Fitriana L
Published: June 2020

Communication is a way for someone to convey an idea or support for a particular purpose; this is very important in the field of education. Mathematical communication is one of the abilities recommended by the National Council of Teachers Mathematics (NCTM). Besides, gender also plays a role in a person’s mathematical communication skills. This research type was descriptive qualitative. Data were obtained from 26 students at MTs Al- Qomar Kepung with different student abilities. Data were taken using the test and interview methods. The results of mathematical communication skills showed that females to draw straight-line competency graphs at 64.58%, while the male has lower abilities at 47.32%. Symbols of the ability of students in math problems by 63.54%, while the ability of male students is 66.96%. The ability to make guesses in challenges to female students was 71.88%, while the ability of male students was lower at 66.07%. Female students improve mathematical communication skills higher than male in the straight line of equation material, to improve students’ communication skills, male students need help and often do math problem exercises.
Analysis of students’ verbal and written mathematical communication error in solving word problem
Authors: Maulyda M A , Annizar A M , Hidayati V R , Mukhlis M
Published: June 2020

Communication is an important ability for every human being to have. In this research, the focus of communication is on students’ mathematical communication skills. Mathematical communication is divided into two parts, namely written communication and verbal communication. If students have good verbal and written mathematical communication skills, then they are easier to express ideas and strategies and are able to write the stages of problem solving well, especially word problem. This is because word problem requires special attention in their solution. Therefore, it is necessary to analyze mathematical communication errors experienced by students in solving mathematical word problem. This study aims to describe the students’ written and oral mathematical communication skills in solving word problem. This type of research is qualitative-descriptive. The research subjects were three junior high school students. Based on the results of the study, there were still students who could not communicate their mathematical ideas well. Students’ written communication error is in converting problem sentences into mathematical models. Student’s writing problem solving are still not in order or coherent. The research finding indicated that the students’ verbal communication skills are better than their written communication skills.
Analysis of higher order thinking skills of SMP students in completing the problem of the numbers through the application of problem based learning
Authors: Imelda  , Anzelina D
Published: June 2020

The large number of student complaints in completing the Computer-Based National Exams in 2018 became the beginning of the emergence of new problems in the application of the curriculum 2013. One of the reasons is that students have not used to solve higher order thinking skills. The teacher is also not accustomed to giving these types of questions in classroom learning. Therefore, this study aims to describe the higher order students’ thinking skills to solve the Number Pattern problem after the application of problem based learning. Problem based learning with stages: student orientation to problems, organizing students to learn, guiding individual/group investigations, developing and presenting work, analyzing and evaluating problem solving processes. The research method used is descriptive method with a quantitative approach. The research subjects were students of class VIII-1 of SMP Negeri 4 Binjai, totaling 30 people. The data collection technique used is a description test consisting of 5 questions covering the levels of analyzing, evaluating and creating. Based on data analysis, it is known that the higher order thinking skills of students in solving problems with Number Patterns after the implementation of problem based learning are in the good category.
Male students’ visual reasoning in solving mathematical problem
Authors: Darmadi  , Sanusi  , Wihardjo E , Karim  , Suprianto  , Prayitno S
Published: June 2020

To improve their ability, students must solve math problems. This paper discusses the visual reasoning of the students in solving mathematical problems. Qualitative research methods with task-based interviews was used to collect and analyze data. Saturated data triangulated results ware used for analysis. The results of the research showed that male student solves problems are macth to Polya theory, identified visual reasoning, the reasoning is done in deductively and inductively, visualizations performed contextually and mathematically. Visual reasoning can help student in solving mathematical problem.
The students’ problem solving abilities in science, technology, engineering and mathematics (stem) based on lesson study for learning community (lslc)
Authors: Ningrum F Y W , Hobri  , Susanto  , Dafik  , Lutvita D , Lestari C F
Published: June 2020

This research was a development research that aimed at finding out the students’ problem solving abilities in mathematics using LSLC-Based STEM learning. This research used multiphase mixture method. This research was started by the development research using 4D, while the quasi experimental research using interpretest-posttest control group design. The research subjects were 32 students of IXth grade in MTsN 2 Jember in 2019/2020. The research sample used three classes, which were the IXF as a control class, the IXG as the first experimental class (1), and the IXH as the second experimental class (2). The research data were collected and tested for its validity. After the instrument was valid and the data were homogeneous and normally distributed, the research data were tested statistically using one-way ANOVA. The results showed that (1) the instrument had fulfilled the validity, practicality, and effectiveness criteria, and (2) the significance value (2-tailed) was 0,000 (p<0.05) which indicated that the application of LSLC-Based STEM learning had a significant effect on the students’ problem solving abilities.
The analysis of problem-based learning implementation and its effect on students creative innovative skills in solving rainbow antimagic coloring based on cognitive style
Authors: Al Jabbar Z L , Dafik  , Hadi A F , Wangguway Y , Sulistiyono B
Published: June 2020

This study aims to determine the application of problem based learning and its effect on students’ creative innovative skills in solving rainbow antimagic coloring based on cognitive style. This study used mixed method which combination of qualitative and quantitative research method. This study used research subjects of 41 students in the experiment class and 32 students in the control class who were students in 3rd semester. Qualitative method is applied to analysis students’ creative innovative skills which used data from test result and phase portraits results while quantitative method is used to statistical analysis. There were differences between control and experiment class when it was given a treatment. In control class used conventional learning while in experiment class, we used problem based learning. The statistical result indicates that the sig (2-tailed) significance of the independent sample t-test in post-test was 0.000 or α ≤ 0.05. it can be concluded that there is an effect of used problem based learning in creative innovative skills on solving rainbow antimagic coloring.
The influence of research-based learning implementation in improving students’ combinatorial thinking skills in solving local irregularity vertex r-dynamic coloring
Authors: Maylisa I N , Dafik  , Hadi A F , Wangguway Y , Harjito L O
Published: June 2020

This research is one of the studies aimed at applying research-based learning and aims to determine its effect on the combinatorial thinking skills of students in solving local irregularity vertex r-dynamic coloring problem. The research method used in this research is mix-method. Mix-method research is a combination of qualitative research and quantitative research. The qualitative method is used to obtain data related to the results of testing on each indicator and the results of the portrait phase while the quantitative method is used for statistical analysis. The experimental class consisted of 41 respondents and the control class consisted of 30 respondents. The treatment given is different, namely between the treatment in the experimental class and the treatment in the control class. In the experimental class applied learning tools that have been developed and applied research-based learning methods. While the control class used research-based learning methods without the learning tools that have been developed. Based on the treatment that has been given, the results of students’ combinatorial thinking skills show for the control class 53% are categorized as low-level, 37% are categorized as a medium level, and 10% are categorized as a high level of combinatorial thinking skills and then experimental class that 34% are categorized as low level, 44% are categorized as a medium level, and 22% are categorized as combinatorial high-level thinking skills. The results of this study of homogeneity of two classes by using a pre-test score of 0,701 result show sig> 0.05 Thus Spake the differences of the mean of two classes is not significant. The inferential statistical result of the independent sample t-test on the posttest results Showed that the sig 2-tailed value was 0.000 (p < 0.05) so that was significant. The conclusion is there is a significant impact of the application of research-based learning in improving the students’ combinatorial thinking skills in solving local irregularity vertex r-dynamic coloring.
The analysis of output based learning implementation in improving students creative and innovative thinking skills in solving H-Irregularity
Authors: Suni D M O , Dafik  , Tirta I M , Wangguway Y , Mukaromah M H
Published: June 2020

This research aims to find out the implementation of output-based learning (OBL) in increasing students’ creative and innovative thinking skills in solving H-irregularity. The research method used in this research is mixed methods. Mixed methods is a combination of qualitative and quantitative methods. Qualitative methods are used to obtain data related to the testing result on each indicator and the result of phase portrait while quantitative methods are used to analyze statistics using SPSS program. The research subject consists of two classes, which are 38 students of the control class and 40 students of the experimental class. Both classes are given different treatments. OBL methods are applied at the control and experimental classes, but only the experimental class that uses students’ worksheets. The research result is that two homogeneous classes using the pretest result show the sig value 0.681>0.05 so that the average difference of both classes is not significant. The result of inferential statistics and independent sample t-test on the post-test result shows that the sig (2-tailed) value is 0.007 (p. 0.05) so that it is significant. The conclusion is that there is a significant effect from the implementation of OBL in increasing student’s creative and innovative thinking skills in solving the H-irregularity problem.
The analysis of problem based learning implementation and its influence to the students generalization thinking skills on solving r-dynamic vertex coloring
Authors: Harjito L O , Dafik  , Kristiana A I , Maylisa I N , Wangguway Y
Published: June 2020

In this study, we aim to analyze the generalization thinking skills of students on solving r-dynamic vertex coloring by applying the Problem Based Learning (PBL). This research used a mixed-method, which combines qualitative methods and quantitative methods. The research subjects consisted of two classes, the first class is the control class of 30 students and the second class is an experimental class of 32 students. The instruments used in this research were pre-test, post-test, observation sheet, and interview sheet. Testing the homogeneity of both classes using the results of the pretest were held before starting the research. Homogeneity test results showed the significance probability value was 0.424> 0.05, so the difference in the average of the two classes was not significant. This shows that the two classes are homogeneous or have the same ability. After testing the homogeneity, we also tested normality by using post-test data. It shows that the independent sample test on the post-test data of the control class and the experimental class is obtained that the score of significance probability is 0.00 <0.05 so that it is significant which means that there is a difference between the control class and the experimental class. While students’ generalization thinking skills showed that 56% were in the very high category, 23% were in the high category, 13% were in the average category, and 8% were in a low category. The results of the study indicate that there is an influence of the application of the Problem Based Learning (PBL) in improving students’ generalization thinking skills in on solving of r-dynamic vertex coloring.
The analysis of the implementation inquiry based learning to improve student mathematical proving skills in solving dominating metric dimention number
Authors: Hayyu A N , Dafik  , Tirta I M , Wangguway Y , Kurniawati S
Published: June 2020

Abstrak. Inquiry based learning has been promoted as a student-centered approach that can strengthen the relationship between teaching and research. Inquiry can be defined as seeking for truth, information or knowledge/understanding and is used in all facets and phases of life. In this study, researches tried to apply inquiry-based learning with mathematical proving skills. The classes used are the control class and the experimental class. This study uses a mixed method namely quantitative and qualitative methods. This study aims to develop inquiry-based learning tools and produce learning products in the form of student worksheets (LKM), learning outcomes tests (THB), and monographs find out significant differences between control class and experimental class. This research uses 4D development methods (define, design, development, and disseminate). To find out the effect of inquiry based learning. Rshiny program is used. The overall result of product validation is 50 % with a valid category. The effectiveness of learning outcomes is 0.304 with the medium category. The practicality of the teacher’s response results was 75.55 with a very practical category, and the student response result was 83.46 with a very practical category. With the testing criteria accept H0 if the significance value or probability value > 0.05 then H0 is accepted and H1 if the significance value or probability value < 0.05 then H0 is rejected. The results showed that there was an impact of the development of inquiry-based learning tools on mathematical proving skills of students to prove the problem of dominating metric dimention numbers.
Improving creative problem solving performance of mathematics students by digital multimedia in graph theory course
Authors: Wahyuningsih S , Satyananda D , Qohar A
Published: June 2020

Integrating learning through digital multimedia can be a disruptive learning innovation in high education. One subject in Mathematics that can has integration with the digital multimedia is graph theory. The reason is that some graph theory topics has application in the real world, hence students implementing these topics to solve problems can be analysed using creative problem solving (CPS) performance. Topics in Graph theory to be analysed by CPS are minimum spanning tree, traveling salesman problems and shortest path. Main objective of this study was to investigate the effect of the integration of digital multimedia to improve creative problem solving performance of mathematics students. Sequential mixed method was used in the study. Students are divided into 2 groups: experimental group that has integration of digital multimedia in the teaching-learning, and control group that has conventional learning. Phase of this study are 1) involving quasi-experimentation to determine the effect of the integration of digital multimedia to improve creative problem solving performance, and 2) exploration of creative problem solving performance through qualitative interviews. Instrument to measure creative problem solving are direct assessment using CPS indicators: understanding the challenge, generating ideas, preparing for action, and planning approach. Finding from this research is a significant increase creative problem solving performance of mathematics students by integrating graph theory course with digital multimedia. Student’s ability in generating ideas and preparing for action mostly is good. Student’s perception about the implementation of digital multimedia is that 67.7% of students very agree that learning activities improving creative problem solving. This digital multimedia implementation can be used as an alternative to disruptive learning innovation in mathematics learning.
The analysis of the discovery learning implementation and its affect to the students conjecturing skills in solving a resolving domination number
Authors: Kurniawati S , Slamin  , Dafik  , Wangguway Y , Hayyu A N
Published: June 2020

Abstrak. Conjecturing plays a role in mathematics learning, namely: (1) conjecturing as a way of solving problems (2) conjecturing as a process that helps students in understanding material, and (3) conjecturing as a process that trains students in reasoning. One learning model that can be applied in lectures in order to improve students’ conjecturing skills in solving expected mathematical problems is a discovery learning model, this paper will describe the development of learning material using discovery learning models and the implementation to know the effect of student conjecturing skills on combinatorics problems. The problem will be focused on discrete modeling with dominating metric dimension number studies. Further we analyze their conjecturing skills by using a triangulation methods, namely a combination of qualitative and quantitative methods. The subjects of this study are students majoring in Mathematics Education at Jember University. Research subjects using experimental class and control class. The result are 22% of students in the control class have fulfilled the completeness criteria study. While in the experimental class there are 29% has met the criteria for mastery learning. It means after the application of discovery learning, the students conjecturing skills are improved signicantly. Overall the results of the study indicate that the stages in conjecturing skill were done sequentially although not all steps were done.
The shadow reckoning problem from ancient society as context for learning Trigonometry
Authors: Fachrudin A D , Ekawati R , Kohar A W , Widadah S , Kusumawati I B , Setianingsih R
Published: June 2020

In this article, we explore the shadow observations and reckoning from various ancient societies, especially form china and medieval Islam, as inspiration in developing a learning design. We used the evolution of trigonometry from old shadow reckoning techniques to arrange instructional tasks for tenth-grade secondary education students and analyse how its role in supporting students’ understanding of trigonometry. We choose Design Research as a method to reach the purpose. However, we restrict our discussion to a part of one phase, namely pilot experiment, from three main phases of design research. The idea of the learning design is involving students in old mathematical activities that concern with concept of shadow ratio as the beginning of basic trigonometry. This research was involving six Indonesian high school students. We developed an instructional design which consists of several activities’ that begin with solving history-based problem using Chong Cha procedure (double difference) from ancient china, where the calculation method is using shadow assistance from two poles as a gnomon to determine the height or depth and distance of an inaccessible object (e.g. mountains or valleys), and followed by solving a problem by using a tool and method from medieval Islam in the surveying process which is actually also developed from the concept of shadow calculations. The result indicated that the use of ancient problems and method can provide valuable insight for the students and give them an opportunity to learn the trigonometric ratio meaningfully. Furthermore, by using history as a context, students got more opportunities to improve their mathematics literacy performance through formulating various contextual mathematics problems into formal mathematics form.
An analysis of problem solving ability in linear equation systems with two variables
Authors: Mustofa B , Mardiyana  , Slamet I
Published: June 2020

Problem-solving is one of the mathematical abilities that students must possess. This study aims to analyze and describe students’ problem-solving abilities in the linear equation systems with two variables as consideration for improving the quality of learning. This type of research is descriptive qualitative. The subjects of this study were 20 tenth grade students of SMA Negeri 1 Comal. They were taken by using purposive sampling method. This research variable is an indicator of problem-solving ability that consists of understanding the problem, identifying and planning problem-solving, solving problems according to plan, and re-examining the answers generated. The data were collected by using tests and interview methods. The result showed that 73,5% of the students were successful in understanding the problems, 59,5% of the students were successful in identifying and planning problem-solving, 38% of the students were successful in solving problems according to plan, and 26% of the students were successful in re-examining the answers generated. Most students were not able to model mathematical forms correctly and have difficulty in solving problems.
Students’ mathematical reasoning ability viewed from self-efficacy
Authors: Jumiarsih D I , Kusmayadi T A , Fitriana L
Published: June 2020

Mathematical reasoning ability is one of the mathematical competencies that need to be developed in school learning. Mathematical reasoning is indispensable in learning in school, where students are asked to think logically or critically and creatively in solving problems. Students must have confidence in solving these problems. This research is a qualitative descriptive study that aims to analyze the ability of reasoning in solving set problems in terms of self-efficacy. The subjects of this study were 31 students from class 8 of Junior High School 1 Polokarto. The instrument used in this study was a matter of mathematical reasoning ability tests and non-tests in the form of a self-efficacy questionnaire. Based on the results of the study, it was stated that students who have high self-efficacy still have difficulty in solving mathematical reasoning problems, students who have medium self-efficacy still have difficulty in solving mathematical reasoning problems, while students who have low self-efficacy always have difficulty in solving mathematical reasoning problems. Teachers should pay more attention to guiding students so that they do not despair to improve mathematical reasoning abilities so as to reduce student learning difficulties.
The written mathematical communication ability of junior high school students in solving set problems
Authors: Azizah N , Usodo B , Saputro D R S
Published: June 2020

Written mathematical communication helps students in the learning process, helps teachers to assess students’ understanding, and becomes the link between the known and the written information with the understood information. The concept of understanding or procedures will be more meaningful if the students can communicate their ideas well. The study aims to describe and analyze students’ written mathematical communication abilities. This research is a qualitative descriptive study. The researchers employ tests and interviews in collecting data. The validity of the data uses the triangulation method. The results reveal that the students who have high communication ability can reach written communication indicators even though not all indicators are achieved correctly. The students who don’t have high communication ability face difficulty in expressing ideas in the form of mathematical symbols/notations so that they use meaningless notation. Meaningless notations are written based on the known information in the task and the results of students’ thinking when they experience difficulties. These students also have not been able to use algebraic expressio ns and draw conclusions correctly. They directly write the results of the answers without the procedure. They state that concluding is unnecessary. Overall, the students who have high, medium, and low ability can draw Venn diagrams even though the diagram is improper.
Analyzing students’ representation ability: viewed from reflective-impulsive cognitive style
Authors: Septiani D , Riyadi  , Triyanto
Published: June 2020

The main purpose of this research is to describe the ability of student representation viewed from reflective-impulsive cognitive style in resolving geometry problems. This research is a qualitative descriptive. The subject of this study consisted of 6 students of 8th grade Islamic Junior High School 2 Sragen which were taken through a purposive sampling technique. The data were collected through mathematical representation tests followed by interviews. The researchers employed the triangulation method to validate the data. Based on the results of the analysis, it could be concluded that the ability of students’ representation who have a reflective cognitive style was known: (1) Students are able to sketch problems in the form of geometric images to clarify problems and solve problems, (2) Students are able to make Mathematical expressions from other representations and solve problems using mathematical expressions. While the ability of representation of students who have impulsive cognitive style known to students is only able to sketch problems into the form of geometric images to clarify the problem and resolve the problem. This is because reflective students tend to be more in solving problems. Reflective students are able to divide and redraw plane shapes. In addition, reflective students are also looking for the area of the image correctly using mathematical symbols. While impulsive students are in a hurry in resolving the problem so that impulsive students are only able to divide and redraw plane shapes. Impulsive students cannot be looking for the area of the image correctly.
PCK (Pedagogical Content Knowledge) profile of mathematics education students at Universitas PGRI Yogyakarta
Authors: Wicaksono B , Dwipa N M S
Published: June 2020

The aim of this research was to analyze the Pedagogical Content Knowledge (PCK) of mathematics education students at Universitas PGRI Yogyakarta. PCK is a representation of the teacher’s Pedagogic and Professional abilities. The subjects of this study were students of the Mathematics Education undergraduate program Universitas PGRI Yogyakarta semester VI. Research data were obtained through a questionnaire instrument in the form of a Content Representation (CoRe) questionnaire accompanied by documentation. The analysis was carried out by means of a qualitative descriptive method by observing each answer and classifying each answer to determine the PCK level of Mathematics Education students at PGRI Yogyakarta University. The results showed that, in general, mathematics education students at the PGRI Yogyakarta university were still at the Pre PCK level, seen from the analysis of the objectives, concepts and pedagogical aspects. This is an indicator that it is necessary to develop modules that can facilitate students in developing PCK capabilities.
Students’ metacognitive ability in contextual teaching and learningof mathematics based on jumping task
Authors: Khoirudin M , Hobri  , Irfan M , Guswanto E , Purwandi D
Published: June 2020

This research aimed to describe the process and result of the develop Mathematics teaching administration by using Contextual Teaching and Learning (CTL) based on jumping task as well as to know its effect on the student’s metacognitive capability. This type of research was a mixed method, which combines quantitative and qualitative research.The development model used in this study is Thiagarajan 4D.Respondents involved in this study consist of two classes, namely an experimental class of 36 students and a control class of 36 students.The research result shows that (1) the teaching administration; valid, practical and effective criteria (2) there is difference of metacognitive ability in control class and experiment class. This is indicated by the significant effect on of application of learning by using CTL based on jumping task.
The development of mathematical problem based on Higher Order Thinking Skill (HOTS) on comparative material by implementing PBL and its effect on the teacher’s creative thinking skill
Authors: Widiatsih A , Wardani D A R , Royhana U , Djamali F , Septory B J
Published: June 2020

Assessing both learning process and achievement is a pedagogical competency in which it refers to an ability that must be possessed by the teacher. The learning done by teacher is intended to maximize the students’ higher order thinking skills, that is why the assessment is required to measure their higher order thinking skills. This research was carried out to study the teacher’s creative thinking skill and the implementation of problem-based learning to improve teacher’s creative thinking skill in creating mathematical problems based on higher order thinking skill (HOTS) through a comparative research. The method used was mixed method combining quantitative and qualitative research methods. 64 respondents were selected as the subject of this research, then they were divided into two classes, an experimental class which involved 32 teachers and a control class which consisted of 32 teachers. This research revealed that there was a significant difference found on the independent t-test from the post-test. Data analysis showed that t-value taken from post-test was sig. 0,000< 0.05, it proved significant. Therefore, there was an effect of the implementation of problem-based learning in which it was able to improve the teachers’ creative thinking skill in creating mathematical problems based on higher order thinking skill.
The effect of Islamic interactive media by using adobe flash CS6 on students’ learning outcomes of class 7 in one-variable linear equation material
Authors: Farihah U , Fadilah S N
Published: June 2020

The purpose of this research was to know the effect of Islamic interactive media by using adobe flash CS6 on student’s learning outcomes in the topic of one variable linear equation. This study was conducted at class 7 of SMP Negeri 1 Arjasa Jember, east Java Indonesia in the 2018-2019 academic years. This research used a quantitative approach in the form of true-experimental design. The research design was two group pretest and post-test. Cluster random sampling was used as the sampling technique. Data collection technique was in the form of tests. Independent sample t test was used to analyse the data. Based on the t test analysis, it was found that in the pretest, there were no significance differences between the experimental class learning outcomes and the control class learning outcomes (sig 0.904) this indicated that two classes have the same initial ability. While in post-test there was significant differences between the learning outcomes of the experiment class and learning outcomes of the control class (sig 0.1006), with average outcome of experimental class of 86.45 higher than the average outcome of the control class of 79.16. The research finding showed that there was an influence of Islamic interactive media using adobe flash CS6 on student learning outcomes.
The implementation of research based learning and the effect to the student metacognition thinking skills in solving H-irregularity problem
Authors: Hidayatul M , Dafik  , Tirta I M , Wangguway Y , Suni D M O
Published: June 2020

This study aims to develop learning tools based on Learning Based Research and produce learning tools in the form of student worksheets (LKM), learning outcomes tests (THB) and monographs and describe the profile of students’ metacognitive skills. The procedure of this study refers to Thiagarajan’s 4D development model which consists of 4 stages, namely defining, designing, developing, and disseminating. This research is a type of mixed research method which is a multimethod approach. Data collection techniques using test methods, interviews, observation and documentation. Educational research data analysis techniques using quantitative research approaches, data collection techniques are usually carried out with test techniques. While data collection techniques in qualitative research generally use observation techniques, in-depth interviews and documentation. The results showed, after the application of research-based learning, 14% of students were categorized in low-level mathematical metacognition thinking skills, and 34% were categorized as medium-level mathematical metacognition thinking skills and 52% were categorized in high-level mathematical metacognitive thinking skills. The results revealed that the implementation of research-based learning can improve the ability of students’ metacognitive thinking skills in solving H-Irregularity problems.
Development of Remedial mathematics learning based on Lesson Study for Learning Community against problem solving
Authors: Purwandi D , Susanto  , Hobri
Published: June 2020

This study aims to develop remedial mathematics learning tools based on Lesson Study for Learning Community. This research uses a mixed method that combines two previous forms of research, namely research and development and experimental research. The subjects of the research were grade VII students. This type of research is a step of research by combining two forms of research that have been there before, namely the development of research and experimental research. The learning tools developed in this study were on the material for the addition and subtraction of integer in grade VII SMP including Learning Implementation Plan, Student Worksheet, and Learning Outcomes Test. After obtaining a valid, practical, and effective device, the device is then tested in the experimental class to find out whether there is an effect on students problem solving abilities. homogeneity test shows the value of sigh. 0.671 on the pre test and 0.450 in the post test so that it can be concluded that the assumption of homogeneity of variance is fulfilled. Based on the results of the validity, effectiveness, and practicality test, the researcher concluded that the learning platform through bridge games and Lesson Study for Learning Community (LSLC) is a valid, effective, and practical device. At the time of the field trial research was also carried out. From the results of the test differences in problem solving in the two classes using the Mann Whitney Test shows the value of sighing. 0,000 (p<0.05), so it can be concluded that there are differences in problem solving between the control class using conventional instruction and the experimental class using Lesson Study for Learning Community (LSLC) based remedial learning with significant results so that when compared with conventional methods this device gets higher results than in students who use conventional methods.
Scheduling algorithms for an expatriate assignment using vertex coloring of graph
Authors: Adiwijaya N O , Slamin
Published: June 2020

Scheduling system for an expatriate assignment needs an effective and efficient way to be designed since the expatriates reside outside their countries to do their assignments in very limited time. The problem of this scheduling system is quite complicated as the expatriates usually work in a team to do more than one assignment in some divisions. This situation leads to the frequent clash of schedules. In this paper, an algorithm for scheduling system was developed to optimize the expatriate assignment. The methods used for developing the algorithms was vertex coloring of graph. This algorithm resulted in the optimal number of colors which is equivalent to the optimal time allocated for the expatriate assignment without any clash schedule among expatriates. The algorithm can be used for designing a software or application for scheduling system.