Indonesia Conference Directory

Corresponding Author
ahmad syarkowi

Institutions
(a) Universitas Jambi
Jl. Lintas Jambi - Muara Bulian Km. 15, Mendalo Darat, Jambi Luar Kota, Kota Jambi, Jambi 36122
(b) Universitas Bengkulu
Jl. Wr. Supratman, Kandang Limun, Muara Bangka Hulu, Kota Bengkulu, Bengkulu 38371

Abstract
The purposes of this study were to describe the implementation of STEM learning by using toy projects and describing students perceptions of these learning. This study used a mixed research method. In the process of describing the learning process, the qualitative method was used and followed by quantitative methods to describe students perceptions. The instruments used were observation sheets and video recorder. For the quantitative, questionnaire was used. These were perception questionnaires consisting of 7 indicators. This questionnaire was adapted from Korpershoek (2013). The results of this study showed the process of implementing learning was well-acceptable. However, the teacher was very constrained in carrying out to assess the learning process. Meanwhile, from the results of quantitative data, the data analysis proved students agree that this learning was easy, interesting, focused, did not contain many theories, fitted to them, and also well-achieved or able-followed the learning process. On the other side, students could not determine whether this learning had varied content or not. This is indicated by the average student choosing neutral for this indicator.

Keywords
Implementation, STEM, studentsPerceptions

Topic
Science Education

Link: https://ifory.id/abstract/bphY7NHzZAxr

Corresponding Author
Rekawati Lagani

Institutions
Program Studi Magister Pendidikan Fisika, Universitas Negeri gorontalo, Jl Jend, Sudirman No. 06, Gorontalo 96128, Indonesia

Abstract
The main objective in this study is to produce learning tools based on local wisdom to improve the ability to think creatively in sound wave material in high school. The test subjects in this study were students of class XI MIA 1 who were in North Gorontalo 1 1 High School, amounting to 23 students. In designing a learning device product, researchers used the ADDIE development model which consisted of 5 stages namely Analysis, design, development, application and evaluation. The tools developed are syllabus, RPP, teaching materials, LKPD and tests of creative thinking skills. This is indicated by validity analysis based on the validator commentator stating that the device developed is valid for use. The practicality of the devices developed is also shown by the positive response from teachers and students. And the implementation of learning which the average percentage in the two meetings is 91% with very good criteria. The number of respondents in the criteria of very good are 12 peoples and the criteria of good are 11 peoples.

Keywords
Learning devices, ADDIE, Creative thinking

Topic
PHYSICS EDUCATION

Link: https://ifory.id/abstract/ZBdJNLjmhAGb

Corresponding Author
Ajeng Siti Prasetya

Institutions
a) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia
Setiabudi No. 229, Bandung 40154, Indonesia
*ajengprasetya[at]gmail.com

Abstract
The purpose of this research was to describe students errors in geometry problems based on mathematical connection ability. This study was qualitative research with subject consisted of twenty five students. The results showed that (1) the students comprehension for recognize and used relationships between ideas in mathematics still lack, (2) The lack of students comprehension in maked connection mathematical ideas, (3) students have difficulty in formed new mathematical ideas so as to produced a comprehensive relationship, (4) students have not been fullied able to recognized and applied one mathematical content to other mathematical content and environments outside mathematics.

Keywords
Students Error; Geometry Problems; Mathematical Connection Ability

Topic
Mathematics Education

Link: https://ifory.id/abstract/mYCQc2fbFNKg

Corresponding Author
Kadek Dwi Hendratma Gunawan

Institutions
Universitas Pendidikan Indonesia

Abstract
Integrated science should be master the subdisciplines of science holistically, but there were some science contents- difficulties that held. This study aims to describe the distribution of difficulties in science content that included physics science, biology science, chemistry science, and earth and space science. Qualitative descriptive was used to analyze data. Data were collected using closed questionnaires. The results revealed that there was some various distribution in difficulties on science content due to differences in the scientific background of pre-service and in-service science teacher. The distribution of that will be used as domain knowledge to develop artificial intelligence media.

Keywords
difficulties in science content, artificial intelligence

Topic
SCIENCE EDUCATION

Link: https://ifory.id/abstract/bKuFAGWVyC3j

Corresponding Author
Muhammad Yakob

Institutions
a) Program Studi Pendidikan Fisika, Universitas Samudra, Aceh, Indonesia
*myakob[at]unsam.ac.id
b) Program Studi Pendidikan Fisika Universitas Syiah Kuala, Banda Aceh, Indonesia.
c) Program Studi Fisika Universitas Samudra, Aceh, Indonesia.
d) Program Studi Pendidikan Matematika Universitas Samudra, Aceh, Indonesia.
e) Program Studi Pendidikan Biologi Universitas Samudra, Aceh, Indonesia

Abstract
A Multitools instrument was developed to measure physical variables such as temperature, magnetic field, and light intensity. Multitools developed using the device of ATMEGA 8535 microcontroller that consists of three sensors: LM35 as a temperature sensor, LDR as a light sensor, and UGN3503 as magnetic field sensor. The design consisted of three stages, namely system design, hardware design, and calibration phase. The calibration test result of Multitools shows alignment level of the temperature sensor (0.9893), light sensor (0.9787) and magnetic sensor (0.9996). Measurement result displayed in physical quantities data and graph on the LCD screen of Multitools. The Multitools can be used in physics lab activity to reduce the effectiveness and train the students- skill in understanding and interpretating the graph.

Keywords
Multitools, Microcomputer Base Laboratory, Temperature, Magnetic Field, Light Intensity

Topic
Physics Education

Link: https://ifory.id/abstract/nW9hfRUjv2q6

Corresponding Author
Magfirah Perkasa

Institutions
(a) Sekolah Tinggi Keguruan dan Ilmu Pendidikan (STKIP) Bima, Jl. Tandean Kel. Mande, Kota Bima 84119, Indonesia
*magfirahperkasa[at]gmail.com

Abstract
The learning model for the implementation of education for sustainable development is still limited and needs development. This research is a development research. The research aims to develop a character learning model based on sustainable development that valid, practical and effective for Indonesian golden generation. The learning model developed is implemented by using learning tools which consists of lesson plans, student worksheets and assessment instruments. The learning tools are developed in three subjects namely Chemistry, Physics and Biology. The development model was adapted from the Dick & Carey model and the trial of this research product was conducted at 11th grade students representing schools in nine pilot project provinces. The instruments for data collection included validation instrument, self assessment sheets and observation sheets. The result of the study shows that: (1) The learning model developed has been named the ESD Character Model with syntax consists of collecting, consultating, analysing, communicating and applying; (2) ESD Character Model is valid to use with very good category and effective to improve student character; and (3) ESD Character Model can be a recommendation for the implementation of education for sustainable development concept.

Keywords
character learning model; sustainable development; golden generation

Topic
SCIENCE EDUCATION

Link: https://ifory.id/abstract/NqTyx39BY8pL

Corresponding Author
Irfan Fauzi

Institutions
a) Postgraduate School Indonesia University of Education
Jl. Dr. Setiabudi No. 299 Bandung, 40154, Indonesia
b) Departemen Chemistry Education, Indonesia University of Education
Jl. Dr. Setiabudi No. 299 Bandung, 40154, Indonesia

Abstract
Changes in the world are now entering the era of industrial revolution 4.0. The Ministry of Education and Culture responds quickly by preparing an appropriate learning curriculum so that students have the skills needed in this era. STEM-based learning is expected to be a solution in facing these challenges. This research aims to develop practical design STEM-based on carbohydrate learning through making paper from banana tree trunks. The use of banana tree trunks was chosen because of the high cellulose and hemicellulose content. The research method used is Research and Development consisting of defining stages, a preliminary study to find out the use of methods used in schools in general. Design stage is the making of learning devices in the form of Learning Implementation Plans and STEM-based student worksheets. Development stage is validated by experts and product trials to find out the feasibility of the practicum design that has been developed. The participants in this study were 25 students of class XII and chemistry teachers. Data was collected by using validation sheets, questionnaires, and observations. From the results of the validation, this research resulted in a feasible practicum design in paper making from banana tree trunks in carbohydrate learning.

Keywords
Practical Design, STEM, Carbohydrates, Paper from Banana Tree Trunk.

Topic
STEM Education

Link: https://ifory.id/abstract/MKLUX9xhjFRZ

Corresponding Author
Indah Karina Yulina

Institutions
Universitas Pendidikan Indonesia

Abstract
HPLC Simulator is a learning application that can be used to facilitate students in understanding system and how to work HPLC instrumentation systematically. This application can be used all over Windows which has 32 bit operating system. The purpose of this research is to potrait how effective the use of HPLC Simulator in practicing students analytical thinking skills. Instruments in this study used test and non test instruments in the form of student satisfaction questionnaire. The results show that the use of HPLC simulators academically assist students in understanding the system and workings of HPLC but has not trained students in analytical thinking.

Keywords
HPLC simulator, analytical thinking skills

Topic
CHEMISTRY EDUCATION

Link: https://ifory.id/abstract/HJRyGN87KPdT

Corresponding Author
Muhammad Syaipul Hayat

Institutions
Program Studi Pendidikan IPA, Sekolah Pascasarjana Universitas Pendidikan Indonesia

Abstract
The paradigm of learning science, especially biology, has now undergone a shift, which is more oriented towards scientific transformation in real world life. Biological content that is learned not only becomes knowledge, but also directed at the utilization of the potential possessed by the content for real life. Therefore, in this paper the author examines the results of research on the development of student lifelong learning, especially Habits of Mind during the taking part in plant diversity course with entrepreneurship-oriented inquiry learning programs. This research involved 31 of 5th semester undergraduate students in biology Education Department in one teachers college in Central Java. The data are taken by rubrics adapted from the Marzano framework. Moreover, the data are taken by observation in learning process too. The results showed that the average Habits of Mind score of students had developed, the data collected before being given the program was 2.69; and the data after being given the program is 3.27 from a total score of 4.00. The data is reinforced by the findings of observation activities during the learning process. Students usually do experiments with one type of work together, even just focus on the core activities, so they become inefficient. After taking several lectures with this program, they can plan neatly before conducting the experiment, can arrange proportional strategies for group assignment, and become more sensitive to feedback. Another finding is that they will always take careful measures (not impulsively), work tenaciously to find solutions even to the end of their knowledge, and finally each student has their self standard of work. Thus, it can be concluded that entrepreneurship-oriented inquiry learning programs applied to the plant diversity course can develop student-s Habits of Mind well.

Keywords
habits of mind, inquiry, entrepreneurship, plant diversity course

Topic
Biology Education

Link: https://ifory.id/abstract/8h92PBWV4YTc

Corresponding Author
Wiworo Retnadi Rias Hayu

Institutions
a) Science Education, Indonesia University of Education
Jl. Dr. Setiabudhi No. 229, 40154 Bandung, Indonesia
*wiworo.iaz[at]gmail.com

b) Department of Science Education SPS UPI, Indonesia University of Education
Jl. Dr. Setiabudhi No. 229, 40154 Bandung, Indonesia

Abstract
In line with the Industrial Revolution Era 4.0, teachers must also try to improve competencies by the demands of the times. The Science Teacher Community is a very relevant vehicle for building the profession of science education. Descriptive research has been carried out to observe the profile of activity in the Science Teacher Community, from excellence to limitations. The results of the observations can recommend solutions to improve the quality of Science Teacher Community activities to be able to accelerate the achievement of teacher competencies. The study was conducted by distributing open questionnaires to 38 science teachers in the urban area of the Regency. Content questions related to Science Teacher Community activities needed. The results of the study show some weaknesses in Science Teacher Community activities. Most respondents stated that there were time and distance constraints when participating in Science Teacher Community activities. Respondents were able to review their weaknesses in content (about physics), management and pedagogical practices of related content in developing 21st-century skills. They also showed weaknesses in IT usage. The recommended recommendation is to manage the practice of Science Teacher Community activities based on blended learning, focusing on efforts to overcome weaknesses in content and pedagogy content knowledge (PCK).

Keywords
Blended learning, MGMP, and Competency

Topic
SCIENCE EDUCATION

Link: https://ifory.id/abstract/3tdzGZXTuCLm

Corresponding Author
BONITA CHINDIANI N

Institutions
a) Post Graduate School, Indonesia University of Education
Jl. DR. Setiabudi No 229, Bandung, Indonesia,
bonitachindianin[at]upi.edu
b) Indonesia University of Education

Abstract
Justification ability can support other mathematical abilities and dispotions and can confirm student-s understanding. It is very important to able to know the student-s justification abilities. The purpose of this study was to determine mathematical justification ability of the first middle student, using qualitative methods from 21 student in one of junior high school in Bandung. Students are given triangle and quadrilateral question to do justification. The result showed that there are 3 level justification of junior high school student. The first level is students assume based on their own thinking, the second level is student explain with mathematical concept but are less precise and the third is student explain with the right and complete mathematical concepts. But when justification involving calculatios, generally student can do justification correctly only a few student make mistake because of miscalculation.

Keywords
Justification

Topic
Mathematics Education

Link: https://ifory.id/abstract/wpkxYA7qbDFP

Corresponding Author
Afandi Afandi

Institutions
Tanjungpura University

Abstract
The effort to integrate the domain of critical thinking in the national education curriculum of prospective science teachers is often hampered due to lack of information about the essential aspects of critical thinking skills (CTS) and critical thinking dispositions (CTD) that needed by prospective science teacher today. This study aims to bring out the effort to identify the profiles of CTS and CTD among prospective science teachers in West Kalimantan, Indonesia. A total of 180 samples from three educational institutions for prospective science teachers were involved in data collection using two instruments, the California Critical Thinking Test (CCTST) and the California Critical Thinking Disposition Inventory (CCTDI). The results of the study show that: (1) CTS prospective science teacher in the aspects of reasoning (deductive and inductive) are in the strong categories, in the aspect of analysis are in the medium category, and in the aspects of inference and evaluation are in the weak categories; (2) CTD prospective science teacher in the aspects of inquisitiveness, maturity, and self-confidence are in the strong categories; in the aspects of systematicity and open-mindedness are in the medium category; and in the aspects of analyticy and truth-seeking are in the weak category; (3) there is a significant and positive correlation between CTS and CTD students of science teacher candidates with a coefficient of 0.542.

Keywords
Critical Thinking Skills, Critical Thinking Disposition, Prospective Science Teachers

Topic
SCIENCE EDUCATION

Link: https://ifory.id/abstract/Facz8Djf4JUp

Corresponding Author
BONITA CHINDIANI N

Institutions
a) Post Graduate School, Indonesia University of Education
Jl. DR. Setiabudi No 229, Bandung, Indonesia,
bonitachindianin[at]upi.edu
b) Indonesia University of Education

Abstract
This research is case study of one elementary school student who calculates the division by performing a reversal operation against multiplication. Usually the division calculation is done by through collated divisions, but these students do the division by doing multiplication operations.

Keywords
Division Operation

Topic
Mathematics Education

Link: https://ifory.id/abstract/mRzCyXYT4ker

Corresponding Author
Nining Riyanti

Institutions
1Biology Education, Postgraduate-s School, Universitas Pendidikan Indonesia,
2Department of Biology Education, FPMIPA, Universitas Pendidikan Indonesia
Jalan Dr. Setiabudhi Nomor 229, Bandung 40154, Indonesia

Abstract
This study is aimed at digging information about the effect of project based learning entrepreneurship education oriented on Waste Recycling to the development of creative thinking skill and concep mastery in senior high scool. This study uses weak experiment method with one group pretest and posttest design. The subject of the study is 35 student in class X IPA of high school in Sumedang. The data is gained from the pretest and posstest about the concept mastery, test of creative thinking, and students entrepreneurship which are completed with observation sheet, questionaire, interview sheet, and performance assesment.

Keywords
Project based learning, creative thinking skills, entrepreneur ship education

Topic
BIOLOGY EDUCATION

Link: https://ifory.id/abstract/dZEMePCKmkpR

Corresponding Author
Agri Teguh Wibowo

Institutions
a, b) Master in Biology Education, School of Postgraduates, Indonesia University of Education

*agriteguhwibowo[at]upi.edu

Abstract
Abstract. Science process skills are needed in 21st century learning, so that it must be developed in the learning process. The aims of this study was to determind the improvement of students science process skills through the development of investigation practicum by utilizing marine resources in Indramayu. The population in this study were all students of class X in Jatibarang 1 High School while the sample of this study was 40 students at X MIA. The research used a quasi experimental design with 15 essay items about science process skills as a research instrument. The experimental group was taught through the development of investigative practicum, while the control group was taught through a verification practicum. The results obtained from the t-test on normal and homogeneous data indicate that there are significant differences, the N-gain value of the experimental group is 0.43 and the control group is 0.26. Based on data analysis, science process skills between students who receive investigation practicum are better than students who receive verification practicum and science process skills students through investigation practicum learning are on the moderate category.

Keywords
Science process skills; Investigation practicum; Marine resources

Topic
Biology Education

Link: https://ifory.id/abstract/BCdNyQtA8RrE

Corresponding Author
Susilawati

Institutions
a) Program Studi Pendidikan Ilmu Pengetahuan Alam, Sekolah Pasca Sarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
*susilawatiipa[at]student.upi.edu
b) Departemen Pendidikan Ilmu Pengetahuan Alam, Program Studi Ilmu Pengetahuan Alam, Sekolah Pasca Sarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia

Abstract
This study aims to produce understanding of the science-based material structure to help students of class VIII MTs in learning the system of motion in humans associated with prayer movements. This research is in the background of the unavailability of MTs science teaching materials which are presented in an integrated manner between the material of motion systems in humans with prayers that are often carried out every day. This study uses descriptive methods, using instruments for determining the main idea. Data collection was carried out by 30 MTs students. The results of the study showed that the teaching material was included in independent material (> 60%). Independent teaching materials are independent teaching materials. The use of these teaching materials can be done individually.

Keywords
teaching materials, system of motion in human, STREM education

Topic
STEM EDUCATION

Link: https://ifory.id/abstract/uGjmNHgWhQZr

Corresponding Author
Hendri Saputra

Institutions
a*) Program Studi Pendidikan IPA Universitas Pendidikan, Bandung, Indonesia.
*hendri.saputra[at]upi.edu
b) Program Studi Pendidikan Fisika, Universitas Samudra, Aceh, Indonesia.

Abstract
This research aims to find out the pre-service teacher-s physics attitude towards physics laboratory in one of the Universities in Aceh. The research method uses a quantitative descriptive approach. Data collection techniques used a scale questionnaire that was adapted from several previous researchers. The Subject of this study is 45 physics student prospective students were taken from the semester, II, IV, and IV as subjects of the study. The data analysis technique is done by calculating the mean of each aspect and indicator and the independent t-test to see differences in attitudes based on gender. Overall, the results of the study showed a negative attitude towards physical practicum activities with the acquisition of a mean of 2.78. The statistical test results for normally distributed and homogeneous data show no significant differences (df. 43, sig. 0.90> 0.04) between the attitudes of male and female students. Negative attitudes towards physics laboratory are caused by the design of practicum verification that do not provide benefits to improve understanding, practice scientific inquiry skills, thinking skills, and solving physics problems. Efforts to improve attitudes toward physics practicum can be done through the design of practical activities oriented to humanistic psychology and constructivism by involving students actively investigating. It is expected that the physics study lecturers to evaluate the practicum program not only suppress the understanding of concepts, but the skills aspects of conducting scientific investigations and attitudes also need to be provided to students through practical activities.

Keywords
Attitude Toward Physics Laboratory, Pre-service Teacher Physics, Practical Laboratory Work

Topic
Physics Education

Link: https://ifory.id/abstract/aDKYZf6kUyVC

Corresponding Author
Al Jupri

Institutions
Departemen Pendidikan Matematika, FPMIPA, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No 229 Bandung, Jawa Barat, Indonesia.

Abstract
Symbol sense refers to an ability to give meaning and to see important structures to symbols, expressions and formulas. Designing algebra tasks for assessing student symbol sense ability is therefore important. This study aims to design types of tasks based on the theory of symbol sense for the topic of quadratic and related equations. To do this, first, we conducted a literature study on the theory of symbol sense. Second, we designed tasks based on characteristics of symbol sense and provided possible strategies to solve the tasks. Third, we validated the designed tasks to seven mathematics and mathematics education experts. The results included: (1) Three types of symbol sense tasks and predictions of strategies to solve the tasks; (2) Experts comments and suggestions for improving the quality of the tasks. We conclude that the designed tasks meet the criteria of the symbol sense characteristics and can further be used for research after some minor revisions.

Keywords
Algebra education, symbol sense, quadratic equations, symbol sense strategy, procedural strategy

Topic
Mathematics Education

Link: https://ifory.id/abstract/cgAXJ4kjmPWf

Corresponding Author
Ulfah Ekaludini

Institutions
a) Prodi Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia.
b) Prodi Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia

Abstract
Mathematical communication skills are one of the essential mathematical basic competencies of mathematics and mathematics education. Without good communication, the development of mathematics will be hampered. The purpose of this study was to determine the mathematical communication skills of high school students in solving trigonometry problems. This study also wants to reveal the difficult aspects of mathematical communication for high school students. The research design used was descriptive qualitative research involving students of class X MIPA 1 as research subjects. 36 students were taken as representatives from 3 groups, namely 12 high group subjects, 12 moderate group subjects, and 12 low group subjects. The instrument used in this study is a test of mathematical communication skills in the form of a description. Based on the research, the average mathematical communication skills of students in the upper group subjects, medium groups, and low groups are in the less category. The results showed that students ability to solve trigonometry problems with mathematical communication had not been achieved. Based on the results of the study it was found that students had difficulty resolving mathematical problems presented in the form of images. Students have difficulty expressing the mathematical concepts used.

Keywords
Mathematical communication, Trigonometry

Topic
Mathematics Education

Link: https://ifory.id/abstract/CdcXZFeGgbmY

Corresponding Author
Prompong Pienpinijtham

Institutions
a) Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan.
b) Sensor Research Unit (SRU), Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand.
c) Research Network NANOTEC-CU on Advanced Structural and Functional Nanomaterials, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.

Abstract
This work has investigated structural changes of graphene oxide (GO) in silver/graphene oxide (AGO) nanocomposites using tip-enhanced Raman scattering (TERS), which is a combination technique of surface-enhanced Raman scattering (SERS) and scanning probe microscopy (SPM). Based on SERS, a Raman spectrum of trace molecules adsorbed on rough metal surfaces/nanoparticles can be collected. On the other hand, nano-scaled topology of samples can be bestowed by SPM. As a result, TERS provides benefits of those two techniques, enabling one to determine molecular information of diminutive samples at specific nano-scaled areas. Because of this markedly high spatial resolution of the TERS technique, the structural changes of GO in AGO can be achieved by constructing line-profile TERS spectra straight from the center of silver nanoparticles (AgNPs) on GO layers. The results show evidences that AgNPs cause shortening of C–C bonds beneath AgNPs, flattening of GO layers, and critical bending on GO layers. Additionally, a connection of carbon atoms via C–C network subsequently expands structural changes with the distance of 200–250 nm from the center of AgNPs, even though this distance is larger than the size of AgNPs. The proposed model of GO structural changes opens new understanding about changes in properties from GO to AGO nanocomposites, which will contribute to a development of advanced nanostructures/nanocomposites in the near future.

Keywords
Tip-enhanced Raman scattering (TERS), Graphene oxide (GO), Silver nanoparticles (AgNPs), Silver/graphene oxide (AGO) nanocomposites, Structural changes.

Topic
DV-Xa Method

Link: https://ifory.id/abstract/bBUkwMf3WEA4

Corresponding Author
Anisa Anisa

Institutions
a) Student of Sekolah Pascasarjana, Departement of Science Education, Universitas Pendidikan Indonesia. Jl. Dr. Setiabudi Bandung, Indonesia
b) Departemen of Biology Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi Bandung, Indonesia
c) Departemen of Physic Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi Bandung, Indonesia

Abstract
This study aims to explore the complexity of macro arguments and the rebuttal of students in oral and written argumentation using socio-scientific issues regarding genetics (mutation and evolution) through the scientific writing heuristic (SWH) approach. The research method conducted was a mixed method with 38 subjects in a science class at one of the public schools in West Java, Indonesia. The socio-scientific issue raised is the use of genetically modified organisms (transgenic organisms). Oral argumentation categorized from level 1 (L1) to infinite level (Ln), and written argumentation level categorized from level 1 (which only contains claims) to level 5 (claim is accompanied by evidence in the form of correct data and relates to the context and content of mutation and evolution). The results showed that the students macro argument level improved on oral argumentation with achievement at level 5 of 45%. The opposite occurs in written arguments, which is a decrease in level after intervention from previously in the range of level 3 to level 2. This is due to the representation of the evidence needed to support the stand point through oral arguments, so that students no longer repeat writing the evidence is in the form of written arguments.

Keywords
Genetics, Mutation, Argumentation, Rebuttal, Revised Toulmins Scheme

Topic
Biology Education

Link: https://ifory.id/abstract/QbEdjF6ehRC7

Corresponding Author
Harumi Sato

Institutions
Kobe University

Abstract
The absorption peaks observed in the terahertz (THz) region reflect a higher-order structure, crystalline structure, and intermolecular interactions such as hydrogen bonding. Therefore, THz spectroscopy and low frequency Raman spectroscopy are unique techniques for analysing higher-order conformations and intermolecular interactions in semicrystalline polymers. We have investigated changes of the higer-order strucure and hydrogen bondins of several kinds of polymers such as poly(glycolic acid) (PGA), poly-(R)-3-hydroxybutyrate (PHB), polylactic acid (PLA), poly(ε-caprolactone) (PCL), poly (butylene succinate) (PBS), poly (ethylene terephthalate) (PET) and poly (butylene terephthalate) (PBT), and so on by THz spectroscopy and THz Raman spectroscopy with quantum chemical calculations (QCCs).

Keywords
terahertz spectroscopy, low frequency Raman spectroscopy, polymer

Topic
Polymer

Link: https://ifory.id/abstract/9HgqtXRubewE

Corresponding Author
Supratman Supratman

Institutions
1 Biologi Education Study Program, Post-Graduate School, Universitas Negeri Malang, Jl. Semarang No 5, Sumbersari, Lowokwaru, Malang 65145, Indonesia
2 Biologi Education Study Program, Universitas Samawa Sumbawa Besar, Jl. Bay Pass Sering, Kerato, Unter iwes, Kabupaten Sumbawa 84316, Indonesia

Abstract
Abstract. One of the biggest calls for educators to take part in the 21st century learning is to make sure students equipped with creative thinking. To empower these skills, a variety of effective learning models can be implemented. The current study aimed to develop a learning model that has the potential to improve students- creative thinking by integrating Problem-Oriented Project-Based Learning (POPBL) and Student Team Achievement Division (STAD), hence called POPBLSTAD. Plomp design was used as the procedures for developing this product. It consisted of a preliminary investigation, design, realization/construction, test, evaluation, and revision. The model was examined through a quasi-experiment. The participants- creative thinking was evaluated based on five indicators: fluency, originality, elaboration, flexibility, and metaphorical thinking, using an essay test. The POPBLSTAD learning model was confirmed valid with a score of 3.47. The results of the ANACOVA analysis showed that the implementation of POPBLSTAD improved student creative thinking significantly. This finding suggests that POPBLSTAD can be used as an alternative learning model that is effective to refine student creative thinking.

Keywords
Creative thinking, Problem-Oriented Project-Based Learning (POPBL), Student Team Achievement Division (STAD, Biologi learning

Topic
Biology Education

Link: https://ifory.id/abstract/Vpa9r64kyAPb

Corresponding Author
Nurjannah S.Pd

Institutions
Universitas Pendidikan Indonesia

Abstract
This study aims to develop teaching material integration by spirit values through 4S TMD method. The research method used is development research by Richey-s and Klein-s consisting of design, development, and evaluation. This study was conducted until the step of design and development. The method of development teaching materials used is 4S TMD. This article is the first part of the development teaching materials that includes selection and structuration steps. At the selection step, an indicator is developed in accordance with the curriculum requirements, explaining the concept, and analyzing the spiritual value. Furthermore, in the structural step developed concept maps, macro structures and multiple representations. The results of the selection and structuring steps were evaluated by an expert lecturer in the chemical education department. The result of the two steps in this study produced a draft of teaching material integrated by spiritual values. Evaluation of the draft of teaching material has done by expert lecturers in the field of chemical education.

Keywords
4S-TMD, teaching material, spiritual value

Topic
Chemistry Education

Link: https://ifory.id/abstract/HDxg2aGRjf76

Corresponding Author
Dwi Siti Hartinah Eny Ambarawati

Institutions
a) Program Studi Pendidikan IPA, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*ambar[at]upi.edu
b) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
c) Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
The purpose of this research is to explore information about student-s argumentation ability in middle school on environmental pollution topic. This research uses descriptive quantitative method. This research was conducted in one of the junior high schools located in Lembang, West Bandung Regency on 29 students of grade 7 as samples that were selected using random sampling techniques. The research instrument used was 6 items essay questions based on indicators of argumentation ability (claim, data, warrant, backing) that have been validated by experts. Student answers were analysed based on the components of the argument. The results showed that 93.10% of students made claims correctly, 54.02% of students presented data, 48.85% of students wrote warrant, and 45.40% of students completed it with backing. Overall it can be concluded that most students have been able to made claims but some of them have difficulty in expressing data, warrant, and backing. The percentage of students argumentation skills can be used as a reference for teachers so that in the future they can determine design or learning activities that are not only focused on understanding concepts but also can build or train students abilities in argumentation.

Keywords
Argumentation ability; Environmental pollution

Topic
Science Education

Link: https://ifory.id/abstract/kGgTxyWcmDHn

Corresponding Author
Reni Wahyuni

Institutions
a) School of Postgraduate, Universitas Pendidikan Indonesia, Jalan Setiabudhi No. 229, Bandung, Jawa Barat, Indonesia
*reniwahyuni.2017[at]upi.edu

Abstract
Algebra is an essential topic in learning mathematics. It is a tool for solving the problem in the related phenomenon in our world. Algebra gives the students how to think systematically and coherently. In another hand, students are difficulties while explaining the algebra aspect. For that reason, we try to examine how and why the students have problems in learning algebra. Particular aspects it will continue to discuss that is concept equality, the equal sign, and variable. The method was chosen from this study is a qualitative method then the analysis by using description. This study shows that most students cannot solve the problem equality because they cannot understand the meaning of the equal sign. Then in the variable, students cannot examine the distributive role, they are incorrect while substituting.

Keywords
middle school student, algebra domain, variable, equality

Topic
Mathematics Education

Link: https://ifory.id/abstract/GYWc6PmgrVkh

Corresponding Author
Nur Eva Zakiah

Institutions
Program Studi Pendidikan Matematika, Universitas Galuh Ciamis, Jl. R. E Martadinata No. 150, Ciamis 46274, Indonesia

Abstract
The implementation of learning with hybrid learning where learning becomes varied, interactive and communicative. Project-Based Learning (PjBL) is an innovative approach to learning that teaches a multitude of strategies critical. Modification of Hybrid-PjBL learning activities is still rarely conducted. Thus, this study aims to describe creative thinking skills and self-regulated learning of preservice teacher who participation Hybrid-PjBL learning activities. The population was all the fourth-semester students in the Mathematics Education Study Program, Galuh University. The study sample involved one class selected with purposive sampling technique, who took the course on Teaching and Learning Strategies. This study used quantitative descriptive with data in the form of creative thinking skill notes, and self-regulated learning questionnaires. Data analysis used descriptive statistics. The results showed that the application of Hybrid-PjBL to students creative thinking skills based on fluency, flexibility, and novelty in mathematical problem solving including good category, and self-regulated learning students had a positive attitude. This study contributes to the study of literature as an alternative learning model relevant to the demands of the twenty-first century scheme.

Keywords
Creative thinking skills, Hybrid learning, Project-based learning, Self-regulated learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/kWTEbhA6nYjf

Corresponding Author
Winda Ramadianti

Institutions
a) Universitas Pendidikan Indonesia
b) Universitas Muhammadiyah Bengkulu

Abstract
Fractions are mathematical concepts that are much applied in mathematics topic. Interpretation of fractions in a topic can be different with others topic. Fractions interpretation is an important thing to be understood by pre-service mathematics teachers. Their interpretation can influence their teaching. To investigate their interpretations of fractions, we asked 35 pre-service mathematics teachers to interpret 4/5. The results showed that only 19 participants in the study could interpret fractions as part of whole, quotient, and ratio. There are not participanst which interpret fraction as operator and measures. These results indicate that although pre-service mathematics teachers often use fractions in mathematics topic since elementary school to university, their interpretation of fractions is still incomplete.

Keywords
fraction

Topic
Mathematics Education

Link: https://ifory.id/abstract/urZA6xQKtTj7

Corresponding Author
Hunaifi Hunaifi

Institutions
1Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
2Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Abstract. This qualitative research aimed to describe students-s mathematical critical discourse on learning by Socrates Scientific. Subjects of this research were students in class VII of a junior high school in Bandarlampung. Data of this research was qualitative data about students mathematical discourse which were taken by observation, documentation, and interview. Three procedures of data analysis were data reduction, data display, and conclusion verification. Based on the result of the research, it was concluded that in mathematical discourse, there were: (1) interpretation and analysis as the dominant indicators of critical thinking ability, (2) clarification and investigation assumptions as Socratic question that was used by teacher more frequently, (3) communicating as Scientific phase that was more frequently appeared. Besides that, the research findings were characteristic pattern of mathematical discourse, mathematical discourse form, and the factors that influence students response in mathematical discourse.

Keywords
Socrates Method; Scientific Approach; Mathematical Critical Discourse

Topic
Mathematics Education

Link: https://ifory.id/abstract/2TtK7EN8pjBW

Corresponding Author
Maulidiya -

Institutions
(1)Program Studi Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
(2) Departemen Pendidikan Matematika, FPMIPA, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract
Critical thinking is needed to solve problems openly. However, the critical thinking ability of Indonesian junior high school students haven-t been optimal. One of mathematics teaching and learning that can improve students critical thinking ability is Differentiated Instruction (DI) approach. The purpose of this study is to know: (1) the improvement critical thinking ability of students who obtained learning with the Differentiated Instruction approach; (2) the differences in the improvement in critical thinking ability in terms of student learning independence. The method used in this study was quasi experiment with the nonequivalent control group design. The subjects of this study were eighth grade students of one of the junior high schools in Bandung. The results shows that: (1) there are differences in the improvement in critical thinking ability of mathematical students who experienced teaching and learning using the Differentiated Instruction approach and conventional approach; (2) there are differences in the increase in critical mathematical thinking ability of students who have high, medium and low learning independence. The results of research and data analysis, conclude that the Differentiated Instruction approach can improve students critical thinking ability.

Keywords
Critical Thinking Ability, Learning Independence, Differentiated Instruction (DI) approach

Topic
Mathematics Education

Link: https://ifory.id/abstract/FNWU3ZpdBaY4