bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of problem-solving skills in material probability in Kanisius Pakem vocational high school
Authors: Gunawan F I , Lagut N M
Published: March 2020

The purpose of this study was to describe the learning process by using the Problem Based Learning model on the topic of probability for Kanisius Pakem Vocational High School students, as well as to describe the problem-solving skills of Kanisius Pakem Vocational High School students after the implementation of learning trajectories on the topic of probability. The type of research used is design research. Data collection techniques are used, namely observation of the learning process. Then the data is analyzed by reducing data, presenting data, and concluding the results of the study. The learning trajectory was tested on 24 students of class X Kanisius Pakem Vocational High School. The research instruments used were field notes and student test sheets. The learning process consists of five-stage, namely the orientation of the students to problem regarding probability, organizing students to learn related to the material probability, guiding individual/group experiences on the learning process material probability, developing and presenting the work obtained from group discussions, and conclude the results of the learning process that has been done. From the results of tests obtained by students after the learning process, four aspects of problem-solving ability will be reviewed. Viewed from the aspects of understanding the problem, the students can describe things that are known and asked in the tests given. Viewed from the aspects of planning problem-solving, students can develop plans based on the information provided. Viewed from the aspect of implementing the plan, the students can translate the problem given in the form of mathematical sentences and students can make decisions in answering the problem. Viewed from the aspect of interpreting the results of the answers, the students have not all been able to verify the answers given.
Creating category Higher Order Thinking Skills (HOTS) exercise for high school students
Authors: Baidil  , Somakim
Published: March 2020

HOTS is an important aspect that must be developed for students in order to solving problems and learning mathematics that is not routine because HOTS requires the ability to think creatively and critically, so the purpose of this research is to develop HOTS questions categories of creating (C6) that are valid and practical and have potential effects towards students’ math literacy. The method of this research is development research with preliminary and formative evaluation stages including self-evaluation, expert reviews, one-to-one, small groups, and field tests. Techniques for collecting data used documents, walkthroughs, interviews, tests, and observations while data analysis uses descriptive. The conclusion from the results of this study is the HOTS exercises creating category (C6) which is valid can be seen from expert review based on content, construct and language assessment. It can be seen from small groups, while the potential effect on students’ literacy skills is quite good. This can be seen from the ability of students to analyze information about exercise, make ideas in designing problem solving and organize elements into new structures that may never exist before.
The ability of multi-representation of junior high school students in solving algebra problem in the TIMSS model
Authors: Azis I I J , Fuad Y , Ekawati R
Published: March 2020

Algebra is one of mathematical topics that’s difficult to understand by students. Many symbols in algebra make students difficult, so multi-representation can help any student to understood. This study is to describe students ability of multi-representation in solving algebra problems. The sample of this qualitative study is the 8th grade students of SMPN 2 Waru Sidoarjo, East Java, there are eight class from A to G, we choose class VIII B was purposively chosen from eight classes and contains 20 girls and 18 boys. All students were given both maths ability test and problem solving test. There were 10 students with the high ability in algebra, 25 students with medium ability in algebra and 3 students with low ability in algebra. Two volunteer students with high ability in algebra who had interesting representations were chosen as our respondents. The semi-structured interview was utilized to investigate the process, representations and students conceptual of algebra. The representation use by the first student is symbolic representation and visual representation. The representation use by the second student is symbolic representation and verbal representation.
The implementation of STEM approach through project based learning to develop student’s creativity
Authors: Budi Setiawan B , Rina Kurniasari Maria , Sarkim Tarsisius
Published: March 2020

One of the student’s skills that must be developed suggested by the national curriculum through the learning process is creativity. The purpose of this study was to develop the student’s creativity through the implementation of Science, Technology, Engineering and Mathematics (STEM) approach using Project Based Learning Method. This research was a design research where the researchers develop the design of an innovative food project made from Salak by integrating the topic of ‘ratio’ in mathematics and ‘food additives’ in science. The research subjects were eighth grade students of Budi Utama Middle School. The research instrument used is a student worksheet (LKPD). The method of data collection carried out in this study was the interactive analytical methods of Miles and Huberman. The research showed that the STEM approach could be implemented by using Project Base Learning to improve student’s creativity.
Utilizing LoRa for IoT based mini weather station as STEM learning media to support industrial revolution 4.0
Authors: Putra Irwansyah , Rajibussalim R , Irwandi I , Muhammad Syukri
Published: March 2020

In a process of learning, learning media play an important role in improving students’ understanding. In this study, a learning medium based on Internet of Thing (IoT) was developed. The IoT is one of core development in technology of Industrial Revolution 4.0 era. The learning media developed in this research study utilizing LoRa (Long Range Area) which functions as a remote data sender. The LoRa paired with Arduino connected to sensors and placed in several location within Banda Aceh. LoRa was integrated with Network Thing to store data and could be displayed on the PC. The researchers and students could observe the changes in air quality in relation to the changes in temperature, humidity, and air pressure from the data that have been stored in the Network Thing cloud. The students are motivated in the learning process to find out relationships between air quality and changes to the temperature, humidity, and air pressure. This is preliminary and ongoing research. The early data were collected from interviews with students after the learning process and collecting the results of the observation. Students’ interest increases with the integration of Science Technology Engineering and Mathematics (STEM) in the learning process. This was demonstrated by students during the learning process. From this learning process, students are also aware of the importance of reducing air pollution. Around 86% of students understand the concepts of subject learned and around 92% of students were motivated and enjoy during the learning.
Development of student worksheet of mathematical modeling learning using a financial context for senior high school students
Authors: Fahmasari  , Darmawijoyo
Published: March 2020

This study aimed to produce a valid and practical Student Worksheet of Mathematical Modelling Learning using a financial context for senior high school students. In addition, it aimed to find out its potential effects on students’ mathematical modelling abilities. The study was conducted in the XI IPA Grade of Public Senior High School No.11 of Palembang City, 2018/2019 Academic Year involving 39 students. This was a development study consisting of a preliminary stage covering the stages of analysis, design, and development, the formative evaluation stages covering self-evaluation, prototyping (expert reviews, one-to-one, and small group), and field tests. The data collection techniques used walkthroughs, observations, and interviews. The result of this study is a valid and practical Student Worksheet Mathematical Modelling Learning using a financial context of compound interest learning material. The validity was based on context, construct and language viewed from the results of expert review and one to one, small group, and analysis of the student answers in the field test stage.
Development of the complexity measurement instruments of the mathematical contextual problem of trigonometry topic
Authors: Melissa M M , Komalasari V Y
Published: March 2020

The complexity of mathematical contextual problems was used to estimate the time to solve the problem and know whether students achieve the competence or not. This aim of this study was to produce the instrument for measuring the complexity of mathematical contextual problem of trigonometry topic. This research and development model used the combination of Plomp and Cennamo & Kalk. The phase were: (1) preliminary study, (2) development, and (3) presentation. The subjects of this study were 1 mathematics teacher, 4 prospective mathematics teachers, and 2 mathematics lecturers. Data collection techniques used questionnaire, test, and interview. Questionnaire validation was used to determine the validation of the developed instrument. The complexity measurement instrument filled by the test subjects to determine the reliability of the developed instrument. Trigonometric test was used to classify students into groups according to their level of ability. Interview was used to determine the practicality of the instruments developed. The results of the study showed that the complexity measurement instrument of mathematical contextual problem that being developed had good quality, it was valid, practice, and reliable. The instrument has been declared valid by the expert and eligible to be tested with minor revisions. This instrument also reached practical criteria based on the results of interviews with respondents. This instrument had fulfilled the reliable criteria based on the calculation of the reliability coefficient which was obtained that each component had fulfilled a minimum “sufficient category” of reliability. There were 4 high reliability components and 2 sufficient reliability components.
Ethnomathematics: Design mathematics learning at secondary schools by using the traditional game of Melayu Riau
Authors: Roza Y , Siregar S N , Solfitri T
Published: March 2020

Riau Province has been committed to become the center of Malay language and culture in 2020. Various efforts need to be made to introduce the Cultural Heritage both inside and outside the province. This research supports government commitment by designing mathematics learning using local culture. This research, design mathematics learning at the Secondary School using the traditional game namely Rimau, Ligu and Guli. The findings will be used in mathematics learning to introduce culture while bringing mathematics closer to student life. This study is a research and development with the Four-D approach. Game exploration is done at Define Stage, Instructional Design is done at the design stage, Learning material is created at the development stage. The Instructional design is disseminated into teachers and students of Secondary Schools. Data collection is done through documentation studies and interviews. The Game exploration resulted in the use of these games for various mathematical concepts of algebra, Geometry, and statistics for mathematics learning in secondary school. Based on FGD with the users can be concluded this Mathematics Learning Design help teachers in delivering relevant topics and recommended to be used by secondary schools teachers.
Impact of blended learning instruction in academic performance of grade 10 students in a selected private high school in San Juan City, Philippines
Authors: Hipol A I , Cabahug R , Bongon R
Published: March 2020

The study aimed to determine if blended learning instruction positively affected students’ academic performance in a specific Science topic. Furthermore, it tried to determine if there was a difference in students’ academic performance who were subjected to 20% blended learning instruction and 60% blended learning instruction. The study made use of a pre-test and post-test which were based on standardized tests. After asking permission from Xavier School and upon the approval to conduct the study, the researcher personally conducted the study to a controlled and an experimental group. After which, data were collected, checked and tallied. These were encoded and analyzed using Stata. T-test and ANOVA were used to determine the difference between the pre-test and post-test scores of the two groups. Evaluation of the blended learning lesson plan was also done through Google forms to verify the results. The study revealed that there is a significant difference between the pre-test and post-test scores of the classes. This implied that the BLP helped the students comprehend the lesson. Furthermore, the findings showed that there is a significant difference between the post-test scores of the experimental and controlled group in favor of the experimental group. This implied that 60% blended learning instruction is more effective than 20% blended learning instruction.
Implementation of virtual manipulative using problem-based learning on topic algebra for seventh grade student
Authors: Nay F A , Rudhito M A
Published: March 2020

The aim of this study to find out the learning design of virtual manipulative using Problem Based Learning (PBL) on seventh grade student in algebra concept. This study was conducted at Junior High School Santo Aloysius Turi from October to February 2019. The research subjects were students of class VIIB (pilot experiment) and VIIA (teaching experiment) in 2018/2019. The type of research used in this study is design research, where researchers design Hypothetical Learning Trajectory (HLT) to teach algebraic operating using virtual manipulative with PBL models. The research stages are preliminary design, experimental design which includes a pilot experiment and teaching experiments, and retrospective analysis. Data collection methods used are documentation, field notes, written tests, and unstructured interviews. Technical data analysis is used according to Miles and Huberman methods, including data reduction, data display, and verification or conclusion. The results showed that the design of learning with virtual manipulative using the Problem Based Learning (PBL) model on the topic of algebraic in class VII of Junior High School Santo Aloysius Turi is as follows: at the point of the preliminary test it can be observed that students still have difficulty in connecting problems into algebraic forms, using the concept of associative and distributive properties to simplify algebraic forms according to their operations in addition, subtraction and multiplication of algebraic forms. Using virtual manipulative with the PBL model can help students to construct their knowledge in order to understand associative and distributive properties used to simplify algebraic forms.
The 21st century skills of prospective teacher students in the industrial revolution 4.0 era (the adaptation and problem-solving skill)
Authors: Fahmi Johan Syah M , Harsono  , Prayitno H J , Susanti Fajriyah D
Published: March 2020

The research aims to describe the achievement of 21st century skills such as adaptation and problem solving as part of 21st century competency in Surakarta Muhammadiyah University students to prepare of the industrial revolution 4.0. The study involved 191 prospective teacher students in Universitas Muhamamdiyah Surakarta. This study is a mixed method with exploratory sequential design. The study finds that teacher students’ adaptation capability is need much improvement. The majority of students say that they prefer to wait for someone else to start the conversations. Furthermore, they are worried to enter in the new society. In the problem-solving skills, most students focus on the solution when facing a problem. This is reasonably good, but some literature posits the finding a factor of the problem is the best way to solve a problem. Besides, there are still students who sceptic and tend to escape from the problem without any solution. This study suggests that it is prominent to include adaptation and problem-solving analysis for prospective teacher-student candidate before accepted in the university.
Identification of misconceptions on heat and temperature among physics education students using four-tier diagnostic test
Authors: Fenditasari Kharisma , Jumadi  , Istiyono E , Hendra
Published: March 2020

This study aims to identify misconception among physics education students in Yogyakarta on heat and temperature topic of physics education. This study uses descriptive study in terms of scanning model. The sample consist of 39 students majoring physics education in Yogyakarta. Data collection uses four tier diagnostic test. This study not only intends to diagnose students’ misconceptions in depth analyis in five categories, but also diagnoses students’ conceptual understanding from each subaspect. The descriptive analysis findings of this study state that the four tier diagnostic test instrument classifies students in five categories as the data analysis outcome about heat and temperature. They are scientific conceptual, lack of knowledge, misconception, false positive and false negative. The conceptual understanding of physics education students in Yogyakarta on heat and temperature topic varies greatly. Based on the results, the percentage of physics education students’ misconceptions in Yogyakarta varies on each subtopic misconception. The biggest misconception occurs in subtopic “thermal equilibrium only occurs if both systems contact directly” reached 61.5%. This shows that the student’s misconception is in high category and need special attention for educators to carry remediation out. Moreover, biggest misconception subtopic is needed more detailed explanations. In addition, this finding is expected to used as one of lecturers’ or teachers’ references to take consideration on the subtopic of heat and temperature which have many potential for misconception. Therefore, the teachers are able to implement the effective teaching strategy to overcome their students’ misconceptions on heat and temperature.
The efforts to develop the geometry teaching and learning tools based on acehnese culture through problem based learning in junior high school students
Authors: Husnawati  , Anwar  , Ikhsan M
Published: March 2020

The implementation of mathematics teaching and learning based on the 2013 curriculum in Indonesia requires teachers to develop their own tools. The tools must be designed thoroughly and systematically so that the teaching and learning will be interactive, inspiring, fun, challenging and efficient. The teaching and learning should also motivate the students to actively participate and provide enough space for innovation, creativity, and independence according to their talents, interests, and physical development. However, considering Indonesia’s geographical differences, the teacher needs to develop the learning tools adapted to students’ cultural backgrounds. This study aims to conduct the needs assessment to develop teaching and learning tools on geometry based on Acehnese culture, including the lesson plan, student worksheet, mathematics test, and teaching materials through problem-based learning. This study employed the Dick and Carey model that was conducted for only seven out of ten stages. The observation was carried out at SMPN 1 Meureudu, Aceh. The results are Prototype 1 consisting of the lesson plan, student worksheet, test result, and teaching material by integrating Acehnese culture into the curved side geometry.
Analysing the problem-solving ability through the Problem-Based Learning model on the subject statistics in the grade VIIIB of Kanisius junior high school Kalasan
Authors: Pandu Y K , Prabaningrum C P
Published: March 2020

Through the conduct of the study, the researcher would like to: (1) describe the learning stages for the subject Statistics through the implementation of the problem-based learning model; and (2) identify the problem-solving skills of the Grade VIIIB students in the Kanisius Junior High School Kalasan for the subject Statistics. As a result, the study belonged to the design research. During the conduct of the study, the subjects who have been involved were the students of Grade VIIIB Kanisius Junior High School Kalasan and the study itself took place from March until April 2019. Then, the data gathering method that had been implemented was the documentation record and the learning test administration while the instrument that had been implemented was the field note and learning test results. After the data had been gathered, the subsequent stage was data reduction, data presentation and conclusion drawing or verification. In overall, the results of the study show that: (1) the learning stages in the problem-based learning model for the subject Statistics with two meetings have already been in accordance to the design; and (2) the problem-solving skills among the students have been various. In the first subject, four out of five indicators of mathematical problem-solving skills by NCTM have been met. On the contrary, in the second subject the five indicators of mathematical problem-solving skills according to NCTM have been met.
Development of learning using Indonesian realistic mathematics education approach to build students’ relational understanding of derivative
Authors: Sulasmi S , Sampoerno P D , Noornia A
Published: March 2020

This study used a design research method aiming to develop the local instructional theory on learning derivative to build relational understanding in class XI Cikarang Utara Senior High School using Indonesian Realistic Mathematics Education (PMRI) approach. Design research consists of three phases that are preparation and design, teaching experiment and retrospective analysis. Stages of building a relational understanding of students assisted by using the context of changes in body weight in infants. This study has 6 activities organized in Local Instructional Objectives. Subjects of this study consisted of 6 senior high school students XI MIPA Cikarang Utara. The data collection has been done by using paper and pencil method, interview method and the method ostensive. The validity of the data used internal and external validity. While the reliability of data using triangulation of data and cross interpretation. All data collected and analyzed in a retrospective analysis. A retrospective analysis showed that the context used can develop the students’relational abilities derivative. The teacher played a major role in directing the learning activities that the learning objectives achieved as instructional objectives that have been prepared.
Designing reasoning problem of linear equations with two variables through compare and exchange activities
Authors: Agustina Amalia , Zulkardi
Published: March 2020

This study aims to design reasoning problems of linear equations with two variables through comparing and exchange activities. This is focused on how students use the compare and exchange activities to find a way to solve linear equations with two variables with mathematics concepts in human’s daily activities is chosen as a design underlines activities in the design based on a Realistic Mathematics Education (RME). RME based teaching has been adopted by countries including Indonesia with the so-called Pendidikan Matematika Realistik Indonesia (PMRI).This study was used to design research as an approach. We first develop hypothetical learning trajectories (HLT) of the learning we designed. Data collected in this study included students’ written works, observation notes, and video-records. The data were analyzed by comparing the actual learning process and the hypothetical learning trajectories (HLT). The data also showed that the students’ activities to be more flexible strategies to solve for equations.
Developing teaching materials two-dimensional figure-based on Palembang local cultural context
Authors: Lisnani
Published: March 2020

Developing teaching materials is important to help students in learning mathematics especially for two-dimensional figure by using Palembang local cultural context. The purpose of the research was to develop whether the teaching materials two-dimensional figure-based on Palembang local cultural context are valid, practical, and have potential effect. The research method used research and development (R&D). The research consists of two stages, namely the preliminary stage and the formative evaluation stage. In one-to-one evaluation involved three students. Then, small group evaluation involved 9 (nine) students in the research. Meanwhile, in field test stage involved 29 students. Data collection techniques employed interviews, tests and documentation. The research was conducted in seventh graders at one of junior high school in Indonesia. The results of this study were the developed teaching materials were categorized as valid, practical and have potential effect. The average score of validity content, construct and product design were 3.65 which was very highly valid level. The practicality of one-to-one was 3.47 and small group evaluation was 3.61 which was at very highly practical level. The teaching materials were categorized as effective. It showed that there were 24 students (82.75%) out of 29 students (17.24%).
Didactic trajectory of learning device development using project-based learning
Authors: Sumarni  , Darhim  , Fatimah S
Published: March 2020

The purpose of this study is to describe the role of project-based learning in design a learning trajectory of learning device development to improve mathematical knowledge for teaching of prospective mathematics teachers. The method use is design research with three stages, namely, preliminary design; teaching experiment; retrospective analysis. The subjects of research are prospective mathematics teacher class of 2019 from one university in Kuningan, Indonesia. The use of project-based learning in designing learning trajectory of learning device development plays an essential role as an elicited to improve mathematical knowledge for teaching. This study also describes the design principles and characteristics of the learning trajectory namely didactic trajectory designed by the role of project-based learning syntax.
Learning design of geometri lukis to support the prospective teachers’ problem posing ability
Authors: Nuriyatin S , Widadah S
Published: March 2020

This study aims to design the design of mathematics Geometri Lukis to support the ability to submit pre-service mathematic teachers. Design research is chosen as a type of research consisting of preliminary design, experimental pilot and teaching experiment. By integrating the ability to submit questions in painting geometry, learning design was obtained with the local instructional theory which included activities: The pilot experiment was carried out in STKIP PGRI Sidorajo by involving 6- semester 4th pre-service mathematics teachers. This activity was held for 3 meetings, with the following activities: 1 ) pre-test, 2) propose question- related the procedure of sketch lines and angels according to condition and term have given and solved it, 3) sketch lines or angles by propose new question to difficulties incomplete question the beginning and solve it, 4) sketch lines and angles by proposing another new question is appropriate with condition and term to have given and solve it, when students could complete of istimewa angle using dividing angles and lines concept. The things that are done in the Preliminary design phase are: 1) analyzing the learning objectives, 2) determining and determining the initial conditions of the study, 3) designing and discussing the conjecture or HLT to be developed.
The characteristics of relational students in understanding the concepts of normal subgroups
Authors: Widada Wahyu , Herawaty Dewi , Ariska Selvin , Afifah Ririn , Anggoro Abdurrobbil F D
Published: March 2020

The quality of students’ responses in understanding the normal subgroup concept can be analyzed through SOLO Taxonomy. One level was relational. The purpose of this study was to describe the characteristics of relational students in understanding the concept of a normal subgroup. This was part of research development. This stage was a needs assessment. The research subjects were 29 undergraduate students of Mathematics Education at the University of Bengkulu. The instrument of this research was the researchers themselves with interview guides. Data collection was done through task-based interviews. Data were analyzed qualitatively through fixed comparison techniques. The results of this study are that the concept of normal subgroup was understood through the relationships between objects in a group. Like the right coset and left coset. The relationship between these objects becomes an integrated entity. The conclusion of this study was that relational students can represent all elements and conduct interdependence with one another, so that it becomes an integrated entity.
The cognitive process of extended trans students in understanding the real number system
Authors: Herawaty Dewi , Widada Wahyu , Sairan Iran , Herdian Fizi , Nugroho Khathibul U Z , Falaq Dwi Anggoro Abdurrobbil
Published: March 2020

There were seven levels of student schema development in learning real analysis. Extended trans was the highest cognitive level. The purpose of this study was to describe the cognitive process of students in understanding the real number system. This was the initial part of development research. We want to know the highest initial ability students have about real number systems. The subjects of this study were 12 students of Real Analysis at the Bachelor of Mathematics Education Program. Students were interviewed based on assignments. Data were analyzed using fixed comparison techniques. The results of this study were that students can build linkages between actions, processes, objects, and other schemes (performing retrieval of the previous schema) by using and selecting procedures or operations in real number systems. He was able to apply the concept of the properties of bounded set to problem solving so that a mature scheme was formed. The scheme can be used to solve related problems. Also, can build new structures based on mature schemes that they already have. The conclusion of this study was that students can interiorize, encapsulate and thematize schemes that mature into a deductive structure.
The mathematization process of students to understand the concept of vectors through learning realistic mathematics and ethnomathematics
Authors: Widada Wahyu , Herawaty Dewi , Beka Yeyen , Sari Rahmi M , Riyani Rizki , Umam Zaid Nugroho Khathibul
Published: March 2020

The concept of vector was one of concepts that was difficult for students to understand. Realistic mathematics learning with ethnomathematics approach makes it easy for students to learn mathematics. The purpose of this study was to describe the mathematical process of students in understanding vector concepts through learning realistic mathematics and ethnomathematics. This research was the prototype stage of development research. The subjects of this study were 38 high school students in Bengkulu. Observation sheets, anecdotes and interview guides were the instruments of this research. Data was collected during the realistic mathematics learning process using the ethnomathematics approach. Data was analyzed qualitatively. The results of this study were the mathematical process of students in understanding the concept of vector by using selfie culture. Camera drones can stop in space. This was one of the multiplication properties of two perpendicular vectors. Multiplication of points was zero. The conclusion of this study was that the mathematical process of students using realistic selfie culture can achieve the multiplication of two vectors which form right angles.
Higher order thinking skills (HOTS) first middle school of class viii students in completing the problem of polyhedron
Authors: Ma’rufi  , Ilyas M , Pasandaran R F
Published: March 2020

The development of mathematics learning now has undergone changes in a contemporary manner. This drastic change focuses on developing the way mathematics works in a case, not just seeing mathematics as a procedure and we know it as HOTS (Higher Order Thinking Skills). This research aims to detect HOTS students in solving problems in building flat side spaces. The instrument is presented in the form of a HOTS problem that contains several indicators, namely: building complex thinking, there are no clear algorithms to solve it, difficult to predict, using approaches that are different from existing problems or with examples that have been given. The results of data analysis show that HOTS can be translated into several capabilities, namely; (1) explore information, (2) arrange conjectures, (3) logical reasoning, (4) structure problem solving, (5) communicate mathematically, and (6) connecting mathematical ideas.
Students’ specializing in mathematics problem solving
Authors: Putri A L , Lukito A , Wijayanti P
Published: March 2020

The ability to think mathematically in solving problems is an important goal of schooling. It is an ultimate goal of teaching that students will be able to condut a mathematical investigation by themselves and that they will be able to identify where the mathematics they have learned is applicable in real-world situations. The first strategy of mathematical thinking is specializing. Specializing means turning to some examples to learn more about the main goal of a concept or problem and these examples are specific and particular instances of more a general situation in a concept or problem. This study based on students’ difficulties to think mathematically in mathematics problem solving. There are still many students who feel confused when solving problem. The purpose of this study is to investigate the specializing of two sixth grade students in solving mathematics problems. They were selected from ten students taking mathematical skills and problem solving tests. They were classified in high and low mathematics abilities. Then they were interviewed based on their work of the given task. When solving the problem, the subject with high mathematics ability was able to describe the known, the way to determine the solution and try to look at the other examples. While the subject with low mathematics ability knows about a concept that can be used to help the problems but she didn’t know the way to determine the solution. Even though taking more time, by applying both a structured-scaffolding and using specializing systematically that fit the problem they succeeded in solving tem. These results may contribute mathematics teachers in a way how to help students use specializing in solving problem.
Analysis of problem solving ability through problem based learning in triangle perimeter of 7th grade in Kanisius Kalasan junior high school
Authors: Annisa N , Mauleto K
Published: March 2020

This study aims to design problem-based learning in the triangle perimeter material and analyze problem-solving ability in triangle perimeter material of 7th Grade in Kanisius Kalasan Junior High School. Students of 7th Grade in Kanisius Kalasan do not get any opportunity to develop problem solving ability because the teacher still use conventional methods. According to the National Council of Teacher of Mathematics (2000) the development of problem solving abilities is one of the goals in the process of learning mathematics, it is an aspect that can make students develop mathematical thinking skills. The type of research used in this study is design research. The subjects of this study were 22 students of class 7B in Kanisius Kalasan. The research instrument in this study was a test sheet. The results of research related to the learning process show that the stages of the process that occur were as follows: (1) the orientation phase of students about the problem regarding of triangle perimeter, (2) organizing learners to learn related to the topic of triangle perimeter, (3) guiding individual/group experience on the process of learning triangle perimeter, (4) developing and presenting the work obtained from the discussion group, and (5) conclude the results of the learning process that has been done. The following results below were obtained based on students problem solving abilities: there are 14 students who were qualified within 4 out of 5 indicators, namely students can identify the elements that were known, asked, and the adequacy of the elements needed, students could form mathematical problems or develop mathematical models, students can apply strategies to solve various problems within or outside mathematics, and students can use mathematics significantly and there are 8 students who qualified within 2 out of 5 indicators namely students can identify the elements that are known, asked, and the adequacy of elements needed and students can use mathematics meaningfully.
The cognitive process of students in understanding the parallels axiom through ethnomathematics learning
Authors: Herawaty D , Khrisnawati D , Widada W , Mundana P , Anggoro A F D
Published: March 2020

The thinking process of students in understanding the parallels axiom through ethnomathematics learning was abstract activities of remembering, analyzing, understanding, judging, reasoning, imagining and speaking that was needed in learning geometry. This was the cognitive process of students based on culture. Lobachevsky’s axiom of parallelism was difficult to understand through low thinking. Ethnomathematics was one solution. The purpose of this study was to describe the cognitive process of students in understanding parallels through ethnomathematics learning. This research was the initial stage of development research. We conducted in-depth interviews with 8 high school students in Bengkulu, Indonesia. The research instrument was the researcher himself who was guided by an interview guide on understanding the Lobachevsky Axiom of Parallel Lines. Interviews were conducted during geometry through the ethnomathematics learning approach. Data were analyzed qualitatively through fixed comparison techniques. The results of this study were that students can encapsulate two or more traits in the Lobachevsky Parallel Lines axiom through ethnomathematics in the form of bubu. (Bubu was a traditional fishing gear in the village community in Bengkulu). The next cognitive process was that students can build an object about infinite lines that were parallel to certain line. The encapsulation activity produces a correct understanding based on the properties of woven mats. The conclusion of this study was that through the ethnomathematics approach students can achieve trans level cognitive processes.
The practicality of mathematics learning module on triangles using GeoGebra
Authors: Suryani A I , Anwar  , Hajidin  , Rofiki I
Published: March 2020

The 2013 curriculum in Indonesia requires students to be able to develop knowledge independently, creatively and skillfully in solving mathematics problems. One way that can be taken by professional mathematics teachers to support the curriculum is to develop precise learning modules that integrate software dynamically and open source, such as GeoGebra. This study aims to determine the practicality of the module developed in mathematics teaching and learning on triangles using GeoGebra. The study used the Plomp development model, which consists of three phases, namely preliminary research, prototyping phase, and assessment phase. The test trial was conducted four times on students of class VII SMP Negeri1 Idi Rayeuk, Aceh. The results showed that the mathematics teaching and learning module using GeoGebra software fulfilled valid and practical criteria. The validity of the module is obtained based on the results of validation by five validators. Meanwhile, the practicality of the module is achieved based on the recommendations of five validators stated that the module could be used with a minor revision and the level of implementation of learning using the module is good. For future research, it is crucial to apply this study on a broader scale to determine the effectiveness of the module.
The reflective thinking skills of preservice biology teacher in histology lectures
Authors: Hindrasti N E K
Published: March 2020

Reflective thinking as integral to the development of professional teaching practices was important developed on preservice biology teacher, including in histology lectures. The purpose of this study was to explore the reflective thinking levels of preservice biology teacher. Survey research used in this study was conducted on third year preservice biology teacher who attended histology lectures (n=36). ‘Reflective Thinking Questionnaire’ (RTQ), which was developed by Kember et al (2000) was used as data collection tool. It includes 16 items measuring four types of reflective thinking: Habitual Action (HA), Understanding (U), Reflection (R), Critical Reflection (CR). Descriptive statistics were used to analyse the data. The results showed that among the comprising factors of reflective thinking, U received the highest mean followed by R, CR, and HA.
Trial of design means-end analysis learning model based on local cultural wisdom to improve communication ability and mathematical abstraction of middle school students
Authors: Dewi I , Siregar N , Andriani A
Published: March 2020

Student’s mathematical communication and abstraction skills were needed in learning mathematics. Another aspect of the student learning process was the need to know and to develop the wisdom of local culture in their daily to lived. This was because students were expected to be a smart generation and still respect their own culture that they will use as life guidance. However, the problem was how to be in still the wisdom of local culture in learning mathematics? Based on these problems, the researcher designed a mathematical learning model that incorporated the wisdom of local culture in mathematics learning. The purpose of this study was to test the Means-Ends Analysis learning model based on the local Cultural Wisdom that had been designed. This learning model was using the wisdom of local culture in mathematics learning. The purpose of this learning model was to improve communication skills and mathematical abstraction skills of students in grade 7. The subjects were Year 7 students of junior high school in the City of Berastagi and Perbaungan. The undertaking, students said that they found it was easier to understand mathematical concepts. Although, the teacher had difficulty in elaborating the problem of mathematical abstraction with the cultural, but the teacher said that the students become easy to communicate their mathematical abilities.
Design and validation of learning sequences of PGSD Sanata Dharma University student to teach the fraction concept for primary student using Montessori manipulatives
Authors: Aprinastuti C , Amelia M A
Published: March 2020

Fraction concept is one of the learning problems that often occurs in elementary students. Elementary student’s misconceptions can be caused by teacher’s misconceptions. PGSD students are teacher candidates, so they must have the correct concept then they can teach the concept of fractions correctly too. Learning must be an inspiration for students when they become teachers later. One medium that can be used to teach fraction concepts is media based on Montessori. Local culture can support the use of Montessori media. This study aims to design and validate the learning sequence of PGSD Students in using Montessori media, to develop design principles to teach fraction concepts in elementary school students. The approach in this research is design research which includes three phases, namely design, trial and assessment. In the design phase, researchers formulate students’ prior knowledge and learning objectives. This is used as the basis for the sequence of learning. This stage of learning is evaluated in a repeat trial phases, the hypothesis design principle is developed and from which the learning stages are redesigned. The results of the assessment phase, together with the experience of the previous cycle and research review, are used to perfect the design principles of the student’s learning sequences so they can teach the concept of fractions correctly.
Developing proportional reasoning problem like PISA with “choosing services” context
Authors: Utami Sri , Zulkardi
Published: March 2020

This study aims to produce the valid mathematic problems like proportional reasoning in PISA question. The research involved seventh-grade students in one of the junior high school in Palembang. The methodology of this research is a design research with development studies type that consist of preliminary and formative evaluation stage. This article just only discuss validation of problems process and data about student strategies in one to one process. The data collection techniques used walktrough, documentation, observation and interview. The validity of the problems discovered from expert review in validation process. Problems validated based on content, problem has been accord to ratio and proportion learning in seventh-grade, construct, the problem require the student’s proportional reasoning and accord to abilities of the seventh-grade students; and language, the problems use of enhancing spelling, could be understood, and didn’t have variety of meanings. The result show that problems are designed using the context of choosing services can indicate how student’s proportional reasoning. Problems developed indicate that students had different strategies and do not refer to the proportion formula, but with reasoning and the use of a ratio table.
Learning design using PMRI to teach central tendency materials
Authors: Meitrilova A , Putri R I I
Published: March 2020

This study aims to determine the role of activities in learning the central tendency materials (mean, median, and mode), which is expected to be able for helping students understanding the concept of statistical learning in grade VIII. The method used in this study is Validation Studies type Design Research involving students of MTs Negeri 1 Palembang. There are three stages in the design research type of validation studies, namely Preparing for the experiment; The design experiment in the form of a Preliminary Teaching Experiment (Pilot Experiment) and Teaching Experiment; and Retrospective analysis. In this study only that of preliminary teaching experiment is considered. The activity begins with questions about remind the presentation of data in the diagrams, then understanding the concept of the mean, the median, and mode, the question of associating the mean and median to determine the mode. The results of the learning experiment show that through the given questions can support students to understand the concept of the central tendency and know the relevance. Errors in doing activities because students are not careful in reading information on the questions, weak in the ability to count, and don’t remember or not understand about the materials given.