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Pengebangan Design Pembelajaran Tematik untuk Meningkatkan Pemahaman Konsep Bilangan Desimal Siswa Sekolah Dasar Erna Wirda; Rahmah Johar; M. Ikhsan
Didaktik Matematika Vol 2, No 1 (2015): Jurnal Didaktik Matematika
Publisher : Universitas Syiah Kuala

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Abstract: The decimal number is a subject matter that is difficult to understand by elementary school student. Fractions and decimals is seen by the student as two different things. Students are difficult to understand that 1/4 is equal to 0.25 for the different way of writing. This condition causes the teachers need to design learning trajectory that can facilitate students to understand the decimals material. The purpose of this study was to develop a Hypothetical Learning Trajectory (HLT) that can help students understand the concept of decimal numbers. This study involves a teacher and 36 students of fourth grade of elementary school in Banda Aceh. The method used was a design research method that was done by using two cycles they are pilot experiments and teaching experiments. Each of them consists of three stages: (i) preparing for the experiment, (ii) the teaching experiment, and (iii) the retrospective analysis. Research data collection using two kinds of instruments that were the main instrument who was the researcher's herself and supporting instruments consisting of student activity sheets, observation sheets, interview, and field notes. The results showed HLT that was developed can help students understand the concept of a decimal number.Keywords: Hypothetical learning trajectory, conceptual understanding, decimal numbers

Mathematical Reasoning Abilities of Students through a Model of Discovery Learning in Senior High School Nisya Fajri; M. Ikhsan; Muhammad Subianto
Proceedings of AICS - Social Sciences Vol 8 (2018): the 8th AIC on Social Sciences, Syiah Kuala University
Publisher : Proceedings of AICS - Social Sciences

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Reasoning in mastering the foundations of mathematics and mathematical competence is one that should be owned by students. While a model of discovery learning is one of the models of learning that must be applied at school in accordance with the curriculum learning goals of 2013, the purpose of this research was to describe the mathematical reasoning abilities of students through a model of discovery learning. The research method used was a qualitative exploratory type approach. The data has been obtained through mathematical reasoning tests and interviews. The result of this study is: 1) High ability students only mastered the indicator to propose allegations. The ability to file allegations limited to the ability to estimate answers with the reasons but the evidence provided was not appropriate; 2) Medium-capacity students only mastered the indicator to propose allegations. Ability to file allegations limited to the ability to estimate answers with the reasons but the evidence provided was not appropriate; 3) Low ability students could not master the six indicators of mathematical reasoning ability. In the indicator of filing suspicion, students estimated answers together with the reasons through trial and error, and students did not know the supporting concepts used in showing evidence. Student’s inability in mathematical reasoning was caused by the inability to master the concept correctly as well as not able to understand the problem and to provide evidence in solving the problem. Therefore, the application of discovery learning should be carried out continuously and consistently so that students can develop reasoning abilities well.Keywords: mathematical reasoning, discovery learning.

Students’ Errors in Compiling Geometric Proof of Gender: A Gender Comparative Study Hendra Susanto; M. Ikhsan; Marwan Marwan
Proceedings of AICS - Social Sciences Vol 8 (2018): the 8th AIC on Social Sciences, Syiah Kuala University
Publisher : Proceedings of AICS - Social Sciences

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Mathematical proofing ability is important to learn because it is very influential on the ability of mathematics. The low ability of mathematical proofing is still a problem that is often encountered. Therefore, the low capability of the evidence needs to be explored to know the root of the more detailed problems to be used as initial data so that the solution becomes more precise and effective. Some researchers claim that gender differences also affect mathematical skills. This study aimed to determine the errors and causes in the proof of geometry regarding gender differences. This research was qualitative descriptive research conducted in the Department of Mathematics Education Faculty of Teacher Training and Education, Syiah Kuala University with subject consisting of male and female students. Techniques of collecting data were done through tests and interviews. Data analysis was done based on Miles and Huberman stages, namely data collection, data reduction, data presentation, and conclusions. The error data compiling the geometry proof was analyzed based on Newmann Error Analysis (NEA). The results showed that: 1) mistakes made by male students tend to Process Skill Error; 2) mistakes made by female students tend to Transformation Error; 3) the cause of errors due to the lack of understanding of the concepts (definition, theorem, illustrations, and usefulness) of the students, the lack of logical knowledge and the structure of the method of proof (the way of conclusion either direct or indirect evidence) limitations of language and notation, and lack of care in the settlement procedure.Keywords: students’ errors, geometric proof, gender differences.

Improving the Mathematical Representation and Self Confidence through Realistic Mathematics Education Approach for Junior High School Nani Suryani; M. Ikhsan; Marwan Marwan
Proceedings of AICS - Social Sciences Vol 8 (2018): the 8th AIC on Social Sciences, Syiah Kuala University
Publisher : Proceedings of AICS - Social Sciences

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Mathematical representation ability is one of the skills that students need to have in the 2013 curriculum learning and self-confidence is one of the psychological aspects that students need to have in the 2013 curriculum learning. The low ability of mathematical representation and confidence of students shows the need for improvement efforts in the implementation of mathematics learning, these efforts made by applying the approach of Realistic Mathematics Education. The purpose of this study was to determine the increase in the ability of mathematical representation and self-confidence of students through a realistic mathematics education approach. The type of this research is experimental research with quantitative approach. The research design used in this research is True Experimental Design with pre-test and post-test control group design. The population in this study were all students of class VII Junior High School, with two class samples of class VII-4 as the experimental class and class VII-5 as control class obtained by random sampling. The research instrument used was a mathematical representation ability test and a student confidence questionnaire — data analysis performed by finding N-Gain value, normality test, homogeneity test, and t-test based on students' initial and final ability. The results showed that there was an increase in the ability of mathematical representation and self-confidence of students through a realistic mathematics education approach.Keywords: ability of mathematical representation, self-confidence, realistic mathematics education approach.

The Improvement of Students Mathematical Understanding and Self-Concept through a Discovery Learning Model T. Mahmudi; M. Ikhsan; Rahmah Johar
Proceedings of AICS - Social Sciences Vol 8 (2018): the 8th AIC on Social Sciences, Syiah Kuala University
Publisher : Proceedings of AICS - Social Sciences

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One of the competencies which students must possess is a mathematical understanding. Another aspect that supports understanding is self-concept. An effort that can be taken as a solution for improving students’ understanding and the self-concept is a model of learning which can lead students to find their concept. This model is often called discovery learning. This study aims to improve students’ mathematical understanding and the self-concept through the discovery learning model. In this study, the researcher used quantitative research. The population of this study was all senior high school Ulumuddin students in the 2016/2017 school year. The sample of this study was 40 students in grade 10 who were randomly chosen from two classes. The data in this study were obtained using instruments compiled in the form of questionnaires and tests that were answered by the respondents. The results showed that the improvement of students’ mathematical understanding and self-concept who obtained learning with the discovery learning model was better than students who gain learning without using the model of Discovery Learning. However, there was no interaction between the model and the levels of understanding and the self-concept of students.Keywords: mathematical understanding, self-concept, discovery learning.

Teknik Reduksi Energi pada Perancangan Data Logger Parameter Matahari M. Ikhsan; Yuwaldi Away
Jurnal Rekayasa Elektrika Vol 11, No 1 (2014)
Publisher : Universitas Syiah Kuala

The research discusses about the energy saving techniques in the design of data logger devices based on AVR microcontroller for monitoring parameters of the air temperature and sunlight intensity in the visible light spectrum. These energy reduction techniques include hardware aspects such as the use of the minimum system, peripherals power supply control and software such as sleep-mode. When the intensity of sun light increases, the interrupt pin will activate the system, otherwise the system is in a state of sleep-mode. The electrical energy consumption of the data logger is continuously observed and recorded on an external memory (SD card) in real-time as so the 24 hours energy consumption can be known and the long-term-used energy can be predicted. Based on the results of measurements and calculations it is known that it takes energy of 8.23 Wh to turn the data logger for 24hours. With this reduction technique, the data logger energy consumption can be reduced by 68.5%.Keywords: data logger, energy saving, sun, sleep mode, interrupt

Teknik Reduksi Energi pada Perancangan Data Logger Parameter Matahari M. Ikhsan; Yuwaldi Away
Jurnal Rekayasa Elektrika Vol 11, No 1 (2014)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v11i1.1993

The research discusses about the energy saving techniques in the design of data logger devices based on AVR microcontroller for monitoring parameters of the air temperature and sunlight intensity in the visible light spectrum. These energy reduction techniques include hardware aspects such as the use of the minimum system, peripherals power supply control and software such as sleep-mode. When the intensity of sun light increases, the interrupt pin will activate the system, otherwise the system is in a state of sleep-mode. The electrical energy consumption of the data logger is continuously observed and recorded on an external memory (SD card) in real-time as so the 24 hours energy consumption can be known and the long-term-used energy can be predicted. Based on the results of measurements and calculations it is known that it takes energy of 8.23 Wh to turn the data logger for 24hours. With this reduction technique, the data logger energy consumption can be reduced by 68.5%.Keywords: data logger, energy saving, sun, sleep mode, interrupt

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