Indonesia Conference Directory

Corresponding Author
Sela Wahyuni

Institutions
a) Magister Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*selawahyuni[at]upi.edu
b)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Assessment is an activity of gathering information about the process and students- learning outcomes based on facts to provide effective feedback. This study aims to describe the constraints of mathematics teachers have not used portfolio to assess students mathematical skills of junior high school. This research uses descriptive research type. Data were collected from 2 teacher of mathematics were selected using purposive sampling. Data collection using techniques interviews and observation. The collected data is reduced, describes the data and makes conclusions. Based on the data analysis the result showed, 1) the teacher had not tried various techniques for evaluating skills using portfolios in mathematics learning, 2) the assessment techniques carried out generally still use the problem description, 3) the obstacles experienced were not yet familiar with various techniques offered in assessing skills aspects using a portfolio; 4) Can be very time consuming for teachers to organize and evaluate the content of portfolios; 5) Constrained in making portfolio assessment rubrics.

Keywords
Portfolio Assessment; Students mathematical skills; Teacher of mathematics

Topic
Mathematics Education

Link: https://ifory.id/abstract/64MLarhqwx8e

Corresponding Author
Baiq Repika Nurul Furqan

Institutions
Bandung Institute of Technology
University of Indonesia

Abstract
The introduction of Biotechnology subject started in SMP (9) and deepen in SMA (12). One of the subjects discusses modern biotechnology product through Genetic Engineer technique to produce lipase enzyme. Students of SMA knowledge on this subject are still limited since the source of information used by the teacher in explaining the subject is generally based on the textbook and delivered through lecturing method. The use of learning media with virtual-technology based is expected to provide an illustration of information which can make it easier and more attractive to understand. In this study, two medium is created, including text and video animation for introducing the students about enzyme lipase production through recombinant technique. To test the superiority of video animation media, the test is done to SMA students in Lombok through the same questions given to test students understanding of the subject, yet video animation and text are offered to give explanation. The evaluation shows that video animation could improve the average outcomes, be more informative and interesting, also be easier to understand that information through text which is shown in advisability test by Biology teachers and students responses. Thus, video animation media can be used as Biotechnology learning media.

Keywords
biotechnology, genetic engineer, enzyme lipase production, video animation

Topic
Biology Education

Link: https://ifory.id/abstract/nAa6G7xbyhRw

Corresponding Author
ROZALITA KURANI

Institutions
(a),(b) Faculty of Math and Science, Padang State University, Jl prof.Dr.Hamka Air Tawar Padang,25132,Indonesia.

Abstract
Mathematics device learning are very important equipment used by teachers in the learning process. Based on the result of observations, researcher found a lack of learning tools that can encourage students to understand concepts in mathematics and activities in the classroom only in the form of one-way learning. It have a negative effect on students, therefore the communication skills of students are still low. This study aims to develop a mathematical learning tool based on the guided inquiry model to improve the mathematical communication skills of eighth grade students of junior high school. The model in this study is the Plomp model which has three steps: Preliminary research, Protytping phase and Assessment. Validity is used with validated validity instruments. The results obtained from this study are (1) RPP which is declared valid with a total value of 3.91 with a very valid category, (2) LKPD which is declared valid in didactic aspects, language and presentation for the average value of a total of 3.6 with a very valid. So it was concluded that the mathematics device learning based on guided inquiry was valid to be used as a learning tool.

Keywords
mathematics device learning; mathematical communication skills; guided inquiry model; plomp model

Topic
Mathematics Education

Link: https://ifory.id/abstract/H8KwMyYFWmNP

Corresponding Author
Usman Usman

Institutions
1 Lecturer in Master Chemistry Education Study Program FKIP Mulawarman University Samarinda
2 Lecturer in Chemistry Department at FMIPA Islamic University Makassar
email: sainusman[at]ymail.com

Abstract
Abstract The purpose of this study was to isolate secondary metabolites compound, determine toxicity and antimicrobial activity from several extracts and isolate of compound from the bark of M. umbellate. The process of extraction, isolation, and purification of secondary metabolites compound from the stem bark of M. umbellate was carried out by maceration, chromatographic techniques, and crystallization and recrystallization. Toxicity test with BSLT method using Artemia salina, while antibacterial and antifungal tests with agar diffusion method (Kirby-Bauer diffusion). Based on the analysis of spectroscopic data; FTIR, UV-Vis, NMR (1D and 2D NMR), the compound isolates were identified as acid 3β-acetyl-olean-12-en-28-oat. Then the results of the toxicity test showed 3β-acetyl-olean-12-en-28-oat acid compounds, methanol extract, hexane, chloroform, and ethyl acetate extract, were toxic to A. salina, but methanol extract had the highest toxicity to A. salina with LC50 169.863 ppm. Ethyl acetate extract and 3β-acetyl-olean-12-en-28-oat compounds, at a concentration of 1000 ppm, were able to inhibit the growth of Staphylococcus aureus with a inhibition zone >14 mm. Methanol extract also has a inhibitory effect on the growth of Candida albicans fungi with a diameter inhibition zona10, 48 mm. Whereas chloroform and hexane extracts showed a weak inhibition of bacteria and test fungi with a inhibition zone < 10.00 mm.

Keywords
Tritepenoid Compounds, Melochia umbellate, Bioactivity

Topic
Chemistry Education

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

Corresponding Author
Nida Humaida

Institutions
Department of Biology Education, Faculty of Teacher Training and Education, The State Islamic University of Antasari Banjarmasin
Jalan A. Yani KM. 4,5 Banjarmasin 70235, Indonesia
*nidahumaida[at]uin-antasari.ac.id

Abstract
In the past, people didnt think they would pay for every m3 of clean water, but now they do. To understand water quality management as a part of Live Environment lecture from Department of Biology Education at the State Islamic University of Antasari Banjarmasin, 31 students did a field study at the Water Treatment Plant from Intan Banjar Water Supply Utility in South Kalimantan. A qualitative approach was used through an interview to the head of the production division, staffs at the Water Treatment Plant, and by collecting some feedback from the students. In response to the relation between the clean water scarcity and the potential increase of the clean water price in the future, 45% of students disagreed if the price of clean water provided by the water supply utility increased, although they were aware of the impacts of climate change theoretically, while 55 % of students accepted that if the price of the clean water raised, they must safe water. A lecture strategy based on the current impacts of climate change is needed to raise awareness that people access to clean water is not unlimited any more and to understand the importance of sustainable use to natural resources.

Keywords
clean water; climate change; quality; supply utility

Topic
Biology Education

Link: https://ifory.id/abstract/Uy2JEhw9tLfD

Corresponding Author
Yudi Nurcahya

Institutions
a) Faculty of Sport Education and Health, Universitas Pendidikan Indonesia, Jalan Setia budi 220, Bandung, Indonesia.
b) School of Postgraduate, Universitas Pendidikan Indonesia.
c) Bangbang Syamsudar, STKIP Pasundan Cimahi

Abstract
This study aims to determine the effect of using audio visual media in training basic skills in passing and shooting in futsal sports. In this study using the experimental method to 20 futsal players. Based on the results of data analysis shows that the use of audio visual media has an influence on improving basic skills of passing and shooting in futsal sports. The influence is due to the use of audio visual media the players get various examples of movements and techniques that are correct in passing and shooting. This study can be used as a reference for teachers and trainers to use audiovisual technology in the learning and training process.

Keywords
Audiovisual media; Passing; Shooting; Futsal

Topic
STEM Education

Link: https://ifory.id/abstract/6PbFBkdaV8xH

Corresponding Author
Euis Erlin

Institutions
1 Biology Education Study Program, FKIP Galuh University, Jl. R.E Martadinata No. 150, Ciamis, 46215, Indonesia.
2 Science Education Study Program, Postgraduate School, Indonesian Education University, Jl. Dr. Setiabudhi, Bandung 40154, Indonesia

Abstract
The aims of this study to examine the influence use of the metacognitive regulation to achievement student in microbiology learning. The subject matter learned are Role of Microbes in Health and Microorganism Ecology on food. Quasi-Experimental with the type of Non-equivalent Control Group Design were used in this research. Students involved in the study were 27 Biology Education students. There are two classes used in this study, namely the class using the metacognitive regulation as an experimental class consisting of 14 students and the non-metacognitive regulation class as a control consisting of 13 students. Learning is done using the method of discussion. In the experimental class discussion is assisted with questions about subject matter. The instrument used was the concept mastery test and self-reflection questionnaire. The results of the study showed that there were differences in the increasing of student achievement between those using metacognitive regulation and non-metacognitive regulation. In learning with a metacognitive regulation obtaining an increase in the average criteria score (g = 0.59), while the non-metacognitive regulation learning obtained an increase in the low criteria score (g = 0.26).

Keywords
Metacognitive regulation, concepts mastery, discussion method

Topic
Biology Education

Link: https://ifory.id/abstract/PUuxgREf3M4p

Corresponding Author
irna suryani

Institutions
Departemen Pendidikan Matematika, UPI

Abstract
USE OF SMARTPHONE, DISCIPLINE, MOTIVATION AND LEARNING ACHIEVEMENTS (Case Study of Sukabumi Al Azhar 7 Islamic Middle School Students 2018/2019 Academic Year) I Suryani 1*, S Prabawanto1 1Departeman Pendidikan Matematika, Universitas Pendidikan Indonesia Setiabudi No.229, bandung 40154, Indonesia *irnasuryani@upi.edu ABSTRACT This study aims to explain the effect of smartphone use on student mathematics learning achievements. The method used in this study is the collection of correlation data using questionnaires and interviews. The subjects of the study were 158 students at the Al Azhar 7 Islamic Middle School in Sukabumi. This research is based on the use of smartphones among students, whose intensity is increasingly increasing, has even become a trend. Uncontrolled use of smartphones results in discipline, motivation and learning achievement being interrupted. The first process is to look for the influence of intensity of smartphone usage on students learning discipline, on motivation and on student achievement. The research instrument consisted of 20 items using smartphone intensity and 20 items of discipline, 20 items of motivation and data on report cards. The data analysis method used is the Product Moment technique from Pearson using SPSS assistance and displayed in table form. Based on the data analysis (assumptions) that have been done, the results of the research from Pearson Corelation show that r = - 0.391 with P = 0.000 (P <0.05). This means there is a relationship (-) between the intensity of smartphone use with discipline, motivation and learning achievement of students. This means that the higher the intensity of smartphone use, the lower the discipline, motivation and learning achievement of students, and vice versa. The intensity of smartphone use gives a large percentage of students discipline, motivation and learning achievement, while the rest is determined by other variables not examined. The results of this studys data analysis that the relationship between the intensity of smartphone use and discipline, motivation and learning achievement of students is inversely or inversely. So that the hypothesis in this study can be said that there is a negative relationship between the intensity of smartphone use with student learning discipline can be accepted.

Keywords
smartphone, discipline, motivation, prestasi

Topic
Mathematics Education

Link: https://ifory.id/abstract/ZqWHU3h7tmGY

Corresponding Author
Andi Suhandi

Institutions
1)Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
2)Program Studi Pendidikan IPA, Sekolah Pascasarjana, Universitas pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract
The aim of this study was to obtain an overview of the effect of using conceptual change oriented text (CCOText) assisted by dynamic models and analogy in the remedial teaching of the concept of heat conduction towards the remediation of misconceptions of high school students. CCOTeext consists of four text sections. In the third section of the text, which is the text part of the scientific explanation, the description is aided by dynamic model and analogy. The method used in this study is a pre-experiment with one group pretest-posttest design. The number of research subjects was 38 students consisting of 22 female and 16 male students, in one of the high schools in the Bandung district of West Java province. The subjects were selected by purposive sampling technique. Data were collected by conception test in the four tier test format related to the concept of heat conduction. The results showed that the use of CCOText in remedial teaching could be remediating 94% of high school students who had misconceptions on the concept of heat conduction. These results indicate that the use of CCOText assisted by Dynamic models and analogy has a high effectiveness in fostering students misconception about the concept of heat conduction.

Keywords
CCOText, Misconception, Remedial Teaching, Heat Conduction

Topic
Physics Education

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

Corresponding Author
Nuri Yuniar Wahyu Putri Abadi

Institutions
a) Student of Post Graduate Early Childhood Education in Yogyakarta State University
Jl. Colombo No 1, Daerah Istimewa Yogyakarta 55281, Indonesia
nuriyuniar.2017[at]student.uny.ac.id
b) Lecturer of Early Childhood Education in Yogyakarta State University
Jl Colombo NO 1, Daerah Istimewa Yogyakarta 55281, Indonesia

Abstract
Mathematics learning in preschool is not always related to addition and subtraction. It is also includes measurement. This study aims to measure the ability to take measurements using standard measurement tools which include categorizing the size of objects, the size of objects, and showing how to measure objects. The study was conducted on 100 preschool children by giving five times treatment using standardized measurement tools with different levels of difficulty in each treatment. Research shows that there is an increase in categorizing objects, identifying the size of objects, and shows how to measure standardized tools in each treatment. Based on the response of preschool children, they really like measuring activities using standard measurement tools.

Keywords
Measurement; Mathematics; Preschool; Standard Measurement Tools

Topic
Mathematics Education

Link: https://ifory.id/abstract/RTCpMyZrKb4P

Corresponding Author
Rahmawati Rahmawati

Institutions
a) Program Studi Pendidikan Fisika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Muhammadiyah Makassar, Jl. Sultan Alauddin No. 259, Makassar 90222, Indonesia
b) Program Studi Pendidikan IPA, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
One of the ways that can be used to validate test items is by Rasch Model application. Validation aspects used in this research consist five aspects, such as (1) item measure, (2) item fit, (3) differential items, (4) person measure, and (5) person fit. The test was given in the form of multiple choice as many as 40 items consisting of 23 items about electricity and 17 items about magnetism. The participants were 60 physics students who were given 60 minutes to do the test. Items was analyzed using WINSTEPS version 3.68.2. The results showed that the test items are valid. Reliability alpha of items is 0.90. It means that the quality of test items is very good.

Keywords
Validation, Rasch Model, Electricity and Magnetism Achievement Test

Topic
Physics Education

Link: https://ifory.id/abstract/dqhPer4HnDAX

Corresponding Author
Yosi Gumala

Institutions
1Program Studi Pendidikan Dasar, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
2Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
3Departemen Pendidikan Guru Sekolah Dasar, Universitas Bhayangkara Jakarta Raya, Jl. Darmawangsa 1 No 1 Jakarta 12140, Indonesia

Abstract
We studied how the follows of Read-Answer-Discuss-Explain and Create (RADEC) sustained pre service teachers as a conception tool for knowledge integration in their science approaches courses. In this examining study, pre service elementary illustrated models of the process of teaching and learning, including what happened before, during, and subsequently teaching. Data sources included initial and final models, details of initial and final models, and pre- and post-interviews. We used the data integration framework to discover how the RADEC models of the process of teaching and learning changed conception supposed the value of modeling the process of teaching and learning. Results showed that developing models supported the pre service elementary teachers in participating lesson design into their conceptions of teaching, as the planning progression was previously an invisible component of teaching. Finally, across the pre service elementary teacher, we found they were able to identify weaknesses in their primary models and saw their individual growing in teacher knowledge. Overall, the RADEC valued the modeling activity and saw their models as a conception tool that facilitated them make sense of their methods assignments. Implications for teacher educators are given.

Keywords
Radec, Conception Change, Pre Service Elementary Teachers- , Discontinued Material

Topic
Chemistry Education

Link: https://ifory.id/abstract/Rd38NfUnumkp

Corresponding Author
Dewi Cahyani

Institutions
1Departement Biology Teaching, State Islamic Institute of Syekh Nurjati Cirebon, Jl. Perjuangan By Pass Sunyaragi, Cirebon 45135, Indonesia
2Departement of Environment Manajement, State Universitas of Jakarta, Jl. Rawamangun Muka, Jakarta Timur 13220, Indonesia

Abstract
Abstract. In the management of coastal areas of Subang regency, many problems are often encountered such as fishpond pollution, physical degradation and beach abrasion. A development model is possibly needed to create a sustainable system for the area. The objectives of this research are to study the situation and to make a model of the coastal area management. The method used in this research is This research used descriptive qualitative approach done through literature study (desk work) and field study (field work), with research mix method (integrating qualitative and quantitative methods) and then for the added management model based on water quality used Research and Development (R&D) with the steps of field study, identification of the problem, purpose of the research, finding the solution of the problem and the modelling by chart. The result of the research indicates that the quality of water through the utilization of natural resource along the coastal area with regard to the brackish water is still tolerable and potentially productive. The outcome of this model is suggested to be applied in further research of brackish water fishery productivity.

Keywords
Model of utilization;Coastal area resources in Water-Quality; Management of Aquaculture

Topic
Science Education

Link: https://ifory.id/abstract/j9eaGNDhrqLm

Corresponding Author
Diana Susanti

Institutions
a. Department of Biology Education, STKIP PGRI West Sumatera, Jl. Gunung Pangilun, Padang 25173, Indonesia

Abstract
Learning Media subject push the students to produce the media that used in learning proccess. But no one the student used the learning material. It made the student not creative to make the design or create the media. To solve this problem, it need to develop the learning material based on projeci based learning, because in Media learning subject the sutents must design or create the media that used in learning. Modul help the students learn indenpendently and make the student learn how to design and create the good media that used in learning proces . The purpose of this research is to produce modul based on project based learning in Leaning media that valid. Models and procedure of development was developed with four-D model, this research was develop phase. Stands of develop phase to validated at STKIP PGRI West Sumatera from lecturer. Data obtained to determinine modul derived from validation sheet. Average validity of modul was 97,35%. The result of the observation showed that modul very valid. Based on the results, this research can be concluded that the Develop of modul based projeci based learning in learning media subject is very valid.

Keywords
Project Based Learning, Modul, Validity

Topic
Biology Education

Link: https://ifory.id/abstract/beKpufyMJL96

Corresponding Author
Viarti Eminita

Institutions
1 Program Studi Pendidikan Matematika, Universitas Muhammadiyah Jakarta, Jl. KH. Ahmad Dahlan, Tangerang Selatan 15419, Indonesia
2 Departemen Statistika, Institut Pertanian Bogor, Jl. Raya Dramaga, Bogor 16680, Indonesia

Abstract
The Program for International Student Assessment (PISA) is an examination system that evaluates the education system every 3 years to 15-year-old students randomly selected. Indonesia was generally still below the average of the Organisation for Economic Cooperation and Development (OECD). In addition, the results of the PISA study are not only interpreted as rankings, but also important to carry out follow-up based on diagnoses produced from the PISA diagnostic survey to determine the weaknesses and strengths of Indonesian students and evaluate the education system in Indonesia. It is important to consider the use of the right and simple model to see the relationship between the diagnostic results of the performance of students PISA achievements in 2015. The purpose of this study was to select variables that significantly influence PISA achievement in 2015 using the SEM regularization model using The Least Absolute Shrinkage and Selection Operator (LASSO) method. The results of the analysis show that the variables that significantly effects students PISA results are the students insight into the environmental, the students perceptions of science truth, and the students- participation in The International Standard Classification of Education level 0 (ISCED 0).

Keywords
LASSO, OECD, PISA, Science, SEM regularization

Topic
STEM Education

Link: https://ifory.id/abstract/u7MrXHAFcw6W

Corresponding Author
Wakhid nur Udin

Institutions
a,b,c) Magister of Biology Education, Universitas Sebelas Maret, Jl. Ir. Sutami No. 36, Kentingan, Surakarta 57126 Indonesia.
wakhidnurudin[at]student.uns.ac.id

Abstract
Abstract. A virtual laboratory is an approach that has been widely used in biology learning but remains a challenge for countries that are still experiencing obstacles in technology. Biology has some abstract concepts which are difficult to be understood by simple explanation, or even difficult to be practiced in a traditional laboratory. The challenges of virtual labs in the biology needs to be analyzed to capture what the characteristic of biology topics which are generally designed with virtual labs and what the impact of virtual labs to students conceptual understanding and their laboratory skills. To track those queries, the systematic review was carried out on research articles published in academical journals within 2010 to 2018. A total of 23 empirical articles were analyzed. Cell or molecular biology and introduction biology are the most widely topics used in the virtual labs. While, understanding the biological concepts is the most studied variable, and virtual labs worked significantly on it. Some studies examined students affective and skills, and the virtual labs are also effective. However, only a few studies examine the learning process. Most biology virtual labs are developed by Adobe Flash Player application with 3D animation. This article suggests further research to develop a biology virtual lab that is more inquiry-based, and measures students understanding of abstract concepts, and science process skills that have not been widely studied.

Keywords
Virtual Laboratory, conceptual understanding, laboratory skill, Undergraduate biology.

Topic
Biology Education

Link: https://ifory.id/abstract/MNbY43qZWpgX

Corresponding Author
Luthfi Azmi

Institutions
a) Program Studi Pendidikan Biologi, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*luthfiazmi[at]upi.edu
b) Departemen Pendidikan Biologi, Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
One of several factors that influence students successfully when understanding the various concepts contained in the diagram is the use of effective visual reading strategies. The results of previous studies prove that students comprehension of the diagram is still low, although diagrams are often used to facilitate students in understanding concepts. This is a descriptive study involving 20 high school students in Bandung. The research aims to analyze the relation between visual comprehension strategies and students comprehension toward plant morphology diagrams. The students are asked to analyze the morphological diagram of magnoliophyte plants for 15 minutes. The strategies emerge from students will be analyzed and categorized into low-level strategies, high-level strategies, and metacognitive strategies Then the students will be given questions to measure the level of comprehension after learning a morphological diagram of Magnoliophyta plants. The results showed that many students do a more low-level strategy that tends to memorize, to rereads diagrams, and to text signaling. It suits to the level of students comprehension about plant morphology that is still in the low category. The outcome shows that knowledge of plant morphology possessed by high school students was still at the level of memorization.

Keywords
Visual reading strategies, Diagram comprehension, Plant morphology

Topic
Biology Education

Link: https://ifory.id/abstract/Ww2DCkRcUnxy

Corresponding Author
Ervina Ervina

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

Abstract
This study aims to compared virtual lab with real lab. The experimental research design was used in this study. Compared two different treatments in the experiment testing the protein content in food materials. This study resulted in differences in results between laboratory trials by virtual lab procedures with virtual labs. This research was also conducted on real laboratories that produce differences (1) facts showed in virtual laboratories and real laboratories, (2) the process of changes that occur in experiments. The virtual lab can-t present all objects/event that appears in the real lab. In conclusion the real lab more potential to appeared concrete and relevant facts than virtual lab

Keywords
VLab; Real Lab;

Topic
Biology Education

Link: https://ifory.id/abstract/W43KQgLveuCM

Corresponding Author
Wulandari Augina Rahmawan

Institutions
a) Faculty of Education, Indonesia University of Education, Setiabudhi Street. 229th, Bandung, Indonesia
b) Faculty of Social Education, Indonesia University of Education, Setiabudhi Street. 229th, Bandung, Indonesia
*wulanaugina[at]student.upi.edu

Abstract
Other ideas from the use of plastic waste can be produced, especially the unused bottle caps by using them as abacus learning media for mathematical counting operations made of bottle caps. Abacus is an ancient calculating device made of wooden frame with beads that can be shifted. So we made an abacus with a plastic bottle cap called SEMATOL (Abacus Bottle Caps). Abacus is a medium that makes it very easy to understand the understanding of children about counting operations and makes it easier for teachers to deliver material messages to be delivered to students in class.

Keywords
Sematol, mathematics learning media

Topic
Mathematics Education

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

Corresponding Author
Datu Kirana

Institutions
a) Physics Education Department, Universitas Negeri Jakarta, Jl. Rawamangun Muka No.1, Jakarta 13220, Indonesia
*dmuliyati[at]unj.ac.id

Abstract
Thinking steps of computational thinking have an essential role in forming creative thinking to find ideas in a structured manner. Not only developing creative thinking, this stage also helps understand how to implement ideas into computational procedures. This study aims to design worksheets for helping the students understand and improve Computational Thinking Skills (CTS) in the material interpolation with the problem based learning (PBL) strategy. In many studies, the application of PBL shows an increase in various student abilities. This research applied to 39 students of computational physics courses. In this study, there was an increase in CTS, such as abstraction, algorithm automation, data analysis, data collection, and data representation.

Keywords
Worksheet; Computational Thinking Skills; Problem-based Learning; Physics Student

Topic
Physics Education

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