Authors:Elly Susanti, Arum Permata Rahmadhani Abstract: This study aims to describe the results of exploring the shapes in Penataran Temple, cultural relics accompanied by geometric concepts. This research uses explorative-descriptive research because it is suitable for uncovering mathematical cases related to Ethnomathematics. The data analysis technique used in this research is qualitative. In this study, an ethnographic approach was used, accompanied by interviews, collecting documentation, or analyzing literature about Penataran Temple as data collection techniques. This study concludes that the relationship between culture and building structure in Penataran Temple has always been attached to the concept of geometry in the material. Wake up flat and build space. In these buildings, the forms are applied in mathematical objects such as in flat plane geometry and space shapes. As in this study results, there are several structures, namely cuboid and right triangular prism and plane shape, in an isosceles triangle. PubDate: 2021-03-19 Issue No:Vol. 5, No. 1 (2021)

Authors:Hariyo Sugeng Widodo, Marhan Taufik, Reni Dwi Susanti Abstract: This research aimed to describe the application of the discovery learning model in mathematics learning and to describe students' mathematical communication skills both orally and in writing. The approach to this research is a qualitative approach, while the type of research used is descriptive. This research was conducted with the subject of class VIII C students in the 2019/2020 school year. The data collection techniques used in this study were observation to determine students 'mathematical communication skills orally and tests to determine students' written communication skills. The instruments used in this study were the observation sheet of students' communication skills and the test in the form of description questions. Based on the results obtained, it shows that the application of the discovery learning model in this study can be said to be quite good but the results are less than optimal and there are several obstacles experienced during learning activities using the discovery learning model. Meanwhile, the level of students' mathematical communication skills is quite good with a percentage of 56% for oral and 59.48% for written. PubDate: 2021-03-19 Issue No:Vol. 5, No. 1 (2021)

Authors:Rizka Abdillah, Yus Mochamad Cholily, Rizal Dian Azmi Abstract: This study aims at knowing and describing students' mathematical communication skills in problem-solving on Pythagorean theorem material based on Polya's procedure. The Polya's problem-solving phase consists of the stage of understanding problems, planning problem solving, implementing problem-solving plans, and re-examining. The subject of this study were 6 students from eighth-grade of Junior High School which was selected based on good, sufficient, and poor mathematical communication criteria. Moreover, this study employed a descriptive qualitative method where the data was collected by using a test and interview. The results of the study revealed that the students with good mathematical communication capabilities criteria were able to solve the problems based on Polya's procedure. Meanwhile, students with sufficient criteria of mathematical communication capability unable to solve the problem based on Polya's procedure at the stage of making plans by altering mathematical information in the form of picture, students did not realize the need for design actions first, students just go ahead and didn 't see the results of completion that have been made. Additionally, students with poor mathematical communication capabilities were unable to solve the problems based on Polya's procedure, students were not meet at the stage of making plans by changing mathematical information in the form of picture, making plans by using and selecting mathematical information or images to solve the problems, and the students did not look back at the completed results. PubDate: 2021-03-19 Issue No:Vol. 5, No. 1 (2021)

Authors:Wisnu Siwi Satiti, Kartika Wulandari Abstract: This article describes students’ mathematical-thinking process in solving PISA-model mathematics -problems. Mathematical-thinking is not only important for academic succes, but is also esssential for developing mathematical reasoning and critical thinking habits in sustainable development for creating better life. In order to achieve the research aims, we used a qualitative approach with descriptive methods. Data were collected using mathematical activities adapted from PISA items. Three students’ works that represent each level of mathematical ability were selected for in-depth analysis. The findings shows that students’ mathematical-thinking ability in solving PISA-model mathematics-problems is determined by how the students go beyond phases of mathematical-thinkng proses (Entry, Attack, Review). Students can solve problems correctly if they are able to go through all phases, although not all aspects of each phase are fulfilled. If students fail in the Entry phase, it is certain that they cannot go through the next two phases properly (Attack and Review). PubDate: 2021-03-18 Issue No:Vol. 5, No. 1 (2021)

Authors:Anis Farida Jamil, Mayang Dintarini Abstract: During the Covid-19 pandemic, learning was fully carried out online. However, the implementation of learning is still not optimal, especially in evaluating student activities.Using online learning, lecturers have difficulty observing student activities, and mostly, online learning was done using assignments or even a teacher-centered. This research was expected to accommodate the application of online learning by the student center using the LAPS-Heuristic model. This study aims to describe student activities in the application of online learning using the Logan Avanue Problem Solving (LAPS)-Heuristic model on geometry material. This research uses a descriptive qualitative-quantitative approach. The research steps were carried out, starting from research planning, implementing the LAPS-Heuristic model online, analyzing, and evaluating activities. Student activity data were obtained from observations made by researchers and one observer. Based on the findings in the study, student activities in the application of online learning using the LAPS-Heuristic model on geometry material are described in 7 aspects. The seven aspects are visual, verbal, listening, writing, drawing, calculating / problem solving, and emotional aspects. In learning reflection material online by applying the LAPS Heuristic learning model, the seven aspects of the activity appear very well. PubDate: 2021-03-18 Issue No:Vol. 5, No. 1 (2021)

Authors:Nika Fetria Trisnawati, Ruslan Hasyim, Mulyono Mulyono, Arie Anang Setyo, M Fathurrahman Fathurrahman Abstract: This research is a pre-experimental research with one-group pretest-posttest design that aims to determine the effectiveness of statistical learning through the scientific approach assisted by PowerPoint media. The population of this research is the eighth-grade students even semester of 2017/2018 academic year, which consists of 10 classes. The sampling technique is cluster random sampling. Data about the feasibility of learning and student activities were obtained by using an observation sheet, data about students' responses to learning were obtained using a questionnaire sheet, and to find out the learning outcomes of statistical material a learning achievement test was used. Analysis of the data used is descriptive analysis to describe the implementation of learning, student activities, student responses, and student learning outcomes and inferential analysis to test the research hypothesis. The results showed that: (1) the implementation of learning using the Scientific Approach assisted by Powerpoint media for 5 meetings in the excellent category, (2) student activities in the very effective category, (3) students' responses to learning tended to be positive, (4) learning outcomes students achieve mastery learning 87.88%, an average value of 78.58. Thus from the results of the study it can be concluded that Mathematics Learning with the Scientific Approach assisted by Powerpoint media in Sorong City Junior High School Students on statistical material is effective in improving student learning outcomes. PubDate: 2021-03-18 Issue No:Vol. 5, No. 1 (2021)

Authors:arif djunaidi Abstract: Students need to be optimally facilitated in expressing ideas and ideas in their minds through collaborative activities in the learning process. The purpose of this study was to explore the improvement of collaboration skills and student learning outcomes through presentation-based cooperative learning in the mathematics learning strategy subject. The research approach is qualitative and a type of classroom action research. The subjects in the study were 37 students who took the mathematics learning strategy course. Data collection was carried out through observation, tests, and field notes. The results showed that the collaborative abilities of students from the first cycle to the second cycle increased. The ability to interact effectively with fellow students, the ability to guide and lead peers, work effectively in groups, and the ability to manage tasks systematically increased, but the ability to be responsible did not show any improvement. The completeness of student learning outcomes at a predetermined minimum completeness score of 75 has increased, 76% of students complete in the first cycle and 84% of students complete in the second cycle. PubDate: 2021-03-18 Issue No:Vol. 5, No. 1 (2021)

Authors:Dewi Netta Febrianti, Jayanti Putri Purwaningrum Abstract: Mathematics is a subject that is disliked by most students. This has resulted in a lot of children who are not enthusiastic about this lesson since elementary school. Elementary school is a place where children start knowing what numbers are, what numbers are and how a number looks. Numbers become the basis for children before learning about mathematics. There are so many branches in numbers that children need to know, starting from the basics of numbers, namely natural numbers, developing into whole numbers, whole numbers, and fractions. This is why the methods of learning mathematics must be well determined, at this time many learning methods have emerged with various criteria. Because of this, the writer tries to find the right theoretical solution according to the number material which has developing properties, the method that can be used is the Bruner Theory, which is to learn by understanding the basics first before proceeding with something that is more difficult because mathematics is an abstract concept. PubDate: 2021-03-18 Issue No:Vol. 5, No. 1 (2021)

Authors:Hersiyati Palayukan Abstract: Production at Zentha Meubel is experiencing constraints due to the availability of wooden planks and the time spent making cabinets and tables. Meanwhile, the company wants to get optimal profit. To solve this problem, this study aims to utilize a linear graphical method program to optimize production profits at Mr. Andarias' Zentha Meubel. This research is a qualitative research type of phenomenology. The process carried out in optimizing the production is collecting data by interview and observation. Furthermore, a mathematical model is made and then optimizes the production profit using the graphical method. The results with the graph method show that production at Zentha furniture will achieve optimal results if it produces 15 units of cabinets with a profit of Rp. 18,750,000. The results of the optimization calculation using the graph method will increase the profit of Rp. 2,250,000. PubDate: 2021-03-18 Issue No:Vol. 5, No. 1 (2021)

Authors:wikan budi utami, sugeng raharjo, Ponoharjo Ponoharjo Abstract: The purpose of this study is to describe: (1) whether the learning achievement using the google classroom application reach the KKM target beyond 55%. (2) whether the google classroom application can improve student learning achievement. (3) how active students are in using the google classroom application. The data collection methods used were tests, observation, and documentation. The research population was the students of class XI. The research sample was XI IPA 3. The sampling technique was purposive sampling. The results showed that: (1) The learning achievement that were taught using the google classroom application, whose value exceeds the KKM is more than 55%. (2) The learning outcomes of students taught using the google classroom application are better with students who are taught using direct learning. (3) The level of active learning of students using the google classroom application is good. PubDate: 2021-03-18 Issue No:Vol. 5, No. 1 (2021)