bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of the constructivism approach to improve students’ understanding of multiplication material
Authors: Altaftazani D H , Rahayu G D S , Kelana J B , Firdaus A R , Wardani D S 
Published: October 2020

Abstract
This research is motivated by the low ability of students’ understanding of concepts in learning mathematics multiplication material. Mathematics learning requires a learning approach that can make students active and student-centered. If mathematics learning is not student-centered, it will lead to boredom which will ultimately make learning unattractive. Therefore, the researcher chose the constructivism approach to improve student learning activities and understanding students’ concepts. This study uses classroom action research and was conducted at SDIT Altaftazani. The results of this study, it appears that student learning activities increase. Students become more active in learning, besides that formative test results also show a good level of student understanding of 35.7% is very good, 35.7% is good and 17.8% is sufficient and only 10.8% is still lacking.
The effect of online mathematics learning on junior high school mathematic resilience during covid-19 pandemic
Authors: Amelia R , Kadarisma G , Fitriani N , Ahmadi Y 
Published: October 2020

Abstract
Covid-19 Pandemic has changed all sectors, one of which is the system in education. Teachers and students are required to learn from home through online learning, it affects the mathematical resilience of students. This research is motivated by the number of findings of decreased student resilience in learning mathematics. The purpose of this study is to examine: (1) Steps of online learning by teachers (2) Mathematical resilience of students during online learning (3) students responses for online learning. The method in this research is descriptive qualitative, the sample selected as many as 4 teachers and 6 students with high, medium and low abilities in one junior high school in Cimahi. Data collection techniques used questionnaires for students to study students ‘mathematical resilience during online learning, interviews to examine students’ responses to online learning, and interviews and observations with teachers to analyze the steps of online learning that were carried out. The results of the study show: 1) The online learning process begins with handouts through Google Classroom, followed by an explanation of the material using a zoom meeting and assignments through the Google Classroom (2) Student resilience of mathematics is high during online learning. (3) students give positive responses for online learning.
Adversity quotient of prospective primary school teachers in making scratch-assisted math application
Authors: Ruqoyyah S , Ristiana M G 
Published: October 2020

Abstract
The adversity question is one of the success factors in learning mathematics. This research is motivated by the low adversity question of students. The purpose of this research is to describe the picture of student adversity in making scratch-assisted mathematics applications. This research uses the descriptive qualitative method. Subjects studied were 107 prospective teachers of semester 2 elementary school in one of the private tertiary institutions in Cimahi City. The instruments in this study used non-tests in the form of questionnaires and interviews. The results showed that the majority of prospective elementary school teacher students were still in the camper category. Adversity question of students in making scratch-assisted mathematics applications needs to be improved. This is because there are still many students difficulties in making algorithms around logical thinking, determining ideas for later application in mathematical application concepts. Students must go deeper into mathematical concepts and have to learn more about adversity quotient because students will need them when they are already working.
The influence of learning styles on students’ mathematical critical thinking skills in solving trigonometric problems
Authors: Setiawan W Y , Rosita N T , Putra B Y G 
Published: October 2020

Abstract
The purpose of this study was to determine the effect of student learning styles on the ability to think critically mathematically in solving trigonometric problems. The target population for this ex post facto study is 27 students of class X MIPA at MAN 1 Sumedang school. The results showed that there was no influence of learning styles on students’ mathematical critical thinking abilities.in this study. There is no difference in the ability to think critically mathematically between students who have a visual learning style with auditory, visual with kinesthetic, and auditory with kinesthetic. This finding has implications for teachers. Teachers need to focus attentively on strategies that target students with visual, auditory, and kinesthetic learning styles. By gaining a better understanding of student learning style groups, it is possible that strategies, methods, approaches, and teaching techniques that can be used to assist in the development of mathematical critical thinking skills and other important abilities can be identified and improved.
Exploring ethnomathematics activities to tobacco farmers’ community at Jember, East Java, Indonesia
Authors: Suwarno  , Lestari N D S , Murtafiah W 
Published: October 2020

Abstract
This research aims to explore and describe the ethnomathematics on activities of the tobacco farmers’ community at Jember. The discourse that explained ethnomathematics could be related to tobacco’s farmer activities at Jember East Java, Indonesia. Jember was one of the largest tobacco-producing districts in East Java, Indonesia. These plants were grown for generations by some residents at Jember, East Java, Indonesia. The tobacco farming heritages had caused this district is known as the city of tobacco so that the government of Jember made tobacco motifs as batik of Jember. Besides, the dance Jember named Lambaco also be created as an appreciation for the existence of tobacco. This research uses qualitative research, while the approach used is Ethnographic. The data collected by observation and interview involved several farmers. Based on result and discussion, we can conclude that on tobacco farmer community in Jember, there are many activities; giving a unit of land, seeding, transplanting and cultivating, harvesting, curing, and trading involved ethnomathematics activities such as: using of non-standard units, arithmetic concept (computing, addition, multiplication, subtraction), geometrical concept, especially of rectangular shape, triangular shape, perpendicular line, 3-D shape, proportional and relational concept, statistics (estimating)
Algebraic literacy skills of secondary school students
Authors: Angriani V , Herman T , Nurlaelah E 
Published: October 2020

Abstract
The focus of this study is the mathematical literacy in the change and relationships section of the algebra and its use, which is called algebraic literacy. This study aims to obtain a description of algebraic literacy skills of VII grade students, it is analysed based on the mathematical literacy levels and indicators. This study is descriptive qualitative. The participants included 72 students from three secondary schools in Bandung. The data were collected using a test and interview. Based on the analysis, the students’ algebraic literacy skills are found to be low, at levels 1, 5, and 6, due to the lack of understanding of the relationship between arithmetic and algebra, the more complex of problem-solving questions, the structured questions with nonroutine type, and the students’ inaccuracy in formulating situations. Moreover, the achievement of ‘formulate’ and ‘interpret’ indicators are found to be lower since the students are less familiar with the concept of symbols used as the substitute for varying quantities, and are less able to contemplate the algebraic solutions, thus the problems cannot be interpreted properly.
The understanding of the triangle in Lobachevski geometry through local culture
Authors: Widada W , Herawaty D , Hudiria I , Prakoso Y A , Anggraeni Y R , Zaid Nugroho K U 
Published: October 2020

Abstract
A triangle is an abstract object in Lobachevsky’s Geometry. The local content is needed as a starting point for learning geometry. This study aims to describe student’s understanding of triangles in Lobachevsky Geometry through local culture. This is an exploratory study. The focus is on analyzing the needs of student’s ability to understand the properties of Lobachevsky’s geometry. The subjects of this study were mathematics education students in Bengkulu, Indonesia. In-depth interviews are based on assignments about triangular problems. The problem is taken from the culture of Bengkulu society about “glutinous rice cake”. Data were analyzed through a collection of interviews and other physical activity. The results of this study are the subjects can connect the elements together to form a coherent unity based on observations of sticky rice cake. They produced a new product by organizing several elements into different forms or patterns from before, namely triangles with a large number of angles of less than 180. The conclusion of this study is that student’s understanding of triangles in Lobachevsky Geometry has reached the level of creating a new proposition, namely the number of angles in triangles in Lobachevski Geometry is less than 180.
Designing mathematical problems task through COVID-19 context
Authors: Ambarita S M , Zulkardi  
Published: October 2020

Abstract
This study aimed to produce PISA model mathematical problems for junior high school students using a valid and practical Covid-19 context. The research method used is design research with the type of development study. At the preliminary stage, a review of literature and design has been reviewed. Meanwhile, the formative evaluation phase only reaches the stage of self-evaluation, one to one, small group. Data collection techniques used were walkthrough, document review, and online interview. The problem developed in this study is related to the number of hand sanitizers that can be made based on available ingredients. The data analysis applied is descriptive. The result of the research is in the form of mathematical problems using a valid and practical PISA model COVID-19 context with 3 items in total. From the validation result in terms of content, constructs, and language based on the validator and one to one assessment, the PISA type mathematics problem with the context of Covid-19 has valid content, construction, and language. Practically, based on small group trials where all students can understand the purpose of the problem well, the students’ thoughts easy to read and do not lead to diverse interpretations.
Optimal control of plant disease model with roguing, replanting, curative, and preventive treatment
Authors: Anggriani N , Amelia R , Istifadah N , Arumi D 
Published: October 2020

Abstract
In this paper, we determine the optimal control of plant disease model with roguing, replanting, curative, and preventive treatment using the Maximum Pontryagin principle. Numerical simulation results show that the procedure can reduce the population of infected plants. Therefore, controlling by roguing, replanting, curative, and preventive treatment is highly recommended to increase the number of susceptible, removed, and protected plants.
Ethnomathematics: Disclosing mathematical concept in batak toba traditional house
Authors: Hidayat E , Ratnaningsih N , Sunendar A , Siregar J S 
Published: October 2020

Abstract
Ethnomathematics is mathematics that grows and develops in a particular culture. Technological advancement makes culture more forgotten, especially in traditional buildings such as traditional houses. Traditional houses contain philosophical values that are used as guidelines for the life of the surrounding community. Unconsciously in traditional house buildings have applied various mathematical concepts in the building. This study aims to reveal the mathematical concepts and philosophical values found in the traditional Toba Batak houses. The method of research conducted in the ethnographic approach. The source of research data was obtained from three speakers: customary kings, building experts, and residents (elders). The instruments in this study were researchers themselves and guidelines for semi-structured interviews—data collection techniques obtained from observation, discussions, and documentation. Testing the validity of the data is done by source triangulation. In this study, it was found that there was an application of mathematical concepts in traditional Toba Batak houses. The mathematical theory consists of a dimensional geometry concept, two-dimensional geometry, three-dimensional geometry, geometric transformation, and number patterns. Each of the forms contained in the traditional Toba Batak house contains philosophical values that are used as learning resources.
What is the relationship between self-regulated learning and students’ mathematical understanding in online lectures during the covid-19 pandemic?
Authors: Lestari W D , Aisah L S , Nurafifah L 
Published: October 2020

Abstract
Covid-19 pandemic forced online lecturing and learning from home (LFH) to be carried out on all campuses in Indonesia. One obstacle in implementing LFH is how students can organize themselves so they can learn well from home. Based on observations in class, students who can manage their learning (Self-Regulated Learning, SRL) well tend to better understand the mathematical material provided. Mathematical understanding is very important because it becomes the basis for students to be able to master other higher mathematical abilities. The purpose of this research is to determine the relationship between self-regulated learning and students’ mathematical understanding in online lectures during the covid-19 pandemic. This research is qualitative descriptive research. The subjects in this research were 14 students contracted discrete mathematics courses on mathematics education department at Wiralodra University in the 2019/2020 event semester by purposive sampling technique. The instruments of this research were self-regulated learning questionnaires, mathematical understanding tests and interviews. Data analysis consist of data reduction, data display, and conclusion drawing/verification. The results showed that there are directly proportional relationship between self-regulated learning and students’ mathematical understanding. Based on these findings, it is necessary to apply self-regulated learning strategies in lectures to improve students’ mathematical understanding.
Analysis of mathematics student understanding: calculus concepts
Authors: Muhassanah N , Lukman H S 
Published: October 2020

Abstract
The purpose of this study is to find out: (1) how well mathematics students in semester 2 of the academic year 2018/2019 UNU Purwokerto understand the concept of calculus 2, (2) the things that cause students’ difficulties in understanding the concept of calculus. The method used in this research is qualitative with descriptive methods. Furthermore, the technique of determining the source of data is using purposive sampling. The number of students selected as research subjects consisted of 12 students in the semester 2 mathematics study program year 2018/2019; in which 3 students were in the medium category and 9 students were in a low category. Meanwhile, there are 4 subjects chosen for the interview: 2 subjects of the moderate category and 2 subjects of the low category. There are two data taken in this study, they are the results of the conceptual understanding test and the results of the interview. Later on, the results of the tests and interviews will be validated by using triangulation methods. Based on the results and discussion of this study, the following conclusions are obtained: first, mathematics students’ understanding of the concept of calculus consists of a high category of 0%, a medium category of 25%, and a low category of 75%. Therefore, it can be concluded that the understanding of the concept of mathematics calculus for semester 2 students in 2018/2019 academic year is still low. The analysis of the understanding of the calculus concept of students of mathematics study program shows a higher understanding of integral material and lower on using the integral material. The second conclusion is the things that cause students’ difficulties in understanding the concept of calculus are students still learned by memorizing and they lack the motivation to repeat the material. Moreover, they rarely practice the questions and they learned only a little of basic concepts of mathematics in high school.
Students’ creative thinking in solving geometry problems
Authors: Jagom Y O , Uskono I V , Leton S I 
Published: October 2020

Abstract
Students’ creative thinking needs to be developed to help them construct new ideas in solving mathematical problems. One of the obstacles that hinder the advancement of creative thinking processes is the incompatibility of the learning approach and cognitive styles. This study aims to describe the students’ creative thinking processes in solving geometry problems based on field-dependent (FD) and field-independent (FI) models of cognitive style. Two students of Mathematics Education Study Program of Widya Mandira Catholic University Kupang participated in this study. Each participant represents different cognitive styles of the field-dependent and field-independent models. The results showed that the participant with the FI cognitive style was able to perform creative thinking processes better than the FD cognitive style participant. This can be observed at all stages. In the preparation stage, the FI cognitive style participant was more capable of expressing important ideas from the given problems; at the incubation stage, she was able to arrange ideas to solve mathematical problems by writing its detailed procedure; at the stage of illumination, she was able to express her ideas verbally; and at the verification stage, re-checking the results of her work.
Structural Equation Modelling of Teaching Quality on Students’ Satisfaction
Authors: Lukman H S , Setiani A , Muhassanah N 
Published: October 2020

Abstract
Students are the main, vital, and central customers that must be served in a college. The college success is characterized by the quality of services provided, and service quality can be identified through student satisfaction. Therefore, knowledge is needed related to variables that affect student satisfaction, especially in the learning process. This study suspects that the knowledge and teaching methods used by educators in the learning process, the depth of material delivered, the implementation of the learning process, the clarity of the assessment of learning outcomes, and the affective interactions of lecturers and students affect the level of student satisfaction. This study uses the Structural Equation Modeling-Partial Least Square (SEM-PLS) with the Bootstrap parameter estimation method. The results showed that all the indicators forming the six latent variables used in this study were significant, so the models met the fit category. The results showed there was a positive and significant effect of the quality of teaching on the level of student satisfaction in the learning process by 19%. However, based on the five variables forming the quality of teaching, only the variable knowledge and teaching methods of lecturers have a significant effect on the level of student satisfaction.
IKIP Siliwangi student’s perceptions of online teaching and learning process during COVID-19 pandemic?
Authors: Nuraeni L , Purwasih R , Mutakim J 
Published: October 2020

Abstract
Covid-19 pandemic in Indonesia has an impact on various fields of life, especially higher education. The online lecture system in higher education is an effective solution and has been applied in the lecture process. This study aims to determine student perceptions about online lectures, to find out the forms of an application used in online lectures and to find out the supporting factors and inhibiting factors in online lectures. This research was conducted with a descriptive survey research method, the sample in this study were students majoring in mathematics education, PGPAUD, and Counseling Guidance, PGSD, Community education and Indonesian with a total number of students 183. The data analysis technique used in this study is to calculate the percentage of data from each indicator, then interpret the score presentation of the data and analyze each indicator. The research instrument uses a question questionnaire sent via the google form application. The results obtained are students’ perceptions of online lectures that students prefer face-to-face lectures compared to online lectures, supporting factors for online lectures are students have free opportunities to learn and find sources of information, availability of data packages, cellphones, laptops and internet networks that support. An inhibiting factor in the online lecture process is the lack of data packages and the internet. This research is expected to be an evaluation of various parties in conducting online learning in tertiary institutions and as study material for other researchers in analyzing and developing students’ perceptions in online learning during emergencies in tertiary institutions.
Designing PISA-like mathematics problem relating change and relationship using physical distancing context
Authors: Nusantara D S , Zulkardi Z , Putri R I I 
Published: October 2020

AbstractThis research was driven by students’ difficulties in solving PISA-like mathematics problems on change and relationship content. The students were not familiar with solving contextual-based problems like PISA, and teachers tended to provide routine problems at low levels. For these reasons, this research aimed to produce a PISA-like mathematics problem that was declared valid, practical, and had potential effects on students’ mathematical proficiency. Design research used as the main framework of research with the type of development studies that had two phases: the preliminary and formative evaluation. Data were collected by conducting a walkthrough, test, interview, and document review. The developed PISAComat was valid from its compatibility with the PISA framework, which related to daily life problems in determining the length of the queue at the shopping center by using physical distancing context on change and relationship content. Practicality was seen from the developed PISAComat can be easily understood by students and well solved even with different strategies. Also, the developed PISAComat had potential effects based on students’ answers at the field test phase, such as understanding the problem, in reality, transforming the real-situation into a mathematical problem, solving a mathematical problem, and interpreting mathematical solution.