bluuebunny/crossref_metadata_2025 huggingface dataset:
Mathematics self efficacy and mathematics performance in online learning
Authors: Negara H R P , Nurlaelah E , Wahyudin  , Herman T , Tamur M
Published: May 2021

Self-efficacy is the ability to perform in dealing with various activities. Changes in learning activities due to Covid-19 affect the learning environment which has an impact on selfefficacy. This study aims to obtain an explanation of mathematics self-efficacy and its relationship with mathematics performance in online learning. The sample in this study was the mathematics performance score on trigonometry, and the Mathematics self-efficacy score of 75 students at one of the universities in Mataram. This research is a correlational research. The research instruments were in the form of a Mathematics Self-efficacy questionnaire and mathematics performance scores on trigonometry. Data were analyzed using descriptive statistics to measure the mean and standard deviation of mathematical self-efficacy and analysis of the correlation between mathematical self-efficacy and mathematics performance. The results showed that most respondents had a high level of mathematical self-efficacy in online learning. Further analysis shows that there is a positive relationship between mathematics self-efficacy and mathematics performance, with an R coefficient of 14.8%. These results explain that variations in Mathematics performance can be explained by variations in Mathematics self-efficacy of 14.8%.
Creative thinking in mathematics: The capacity of vocational school students
Authors: Julizal T , Johar R , Hizir
Published: May 2021

Creative thinking is the capacity to generate ideas and new ideas. For vocational students, creative thinking is a basis for applying knowledge in their fields. Preliminary studies demonstrate that students experience difficulties in solving geometry and other problems that require creative thinking. This study aims is to analyze students’ creative thinking ability and the factors that influence it. This qualitative research was conducted at SMK (Vocational School) Negeri 1 Panga Aceh Jaya. It involved 113 students in answering the tests, in which six of them were selected to be interviewed. The research instruments were creative thinking tests and interviews. Data were analyzed descriptively. The results showed that 47.79% of students fulfilled the fluency indicator, while 49.78% met the originality indicator. The interview demonstrated that the lack of capacity was due to poor ability of fluent thinking. Students could not generate various or new ideas; therefore, they had difficulties reaching the originality level. Based on these findings, it is recommended to provide students with tasks or activities to develop their creative thinking skills.
Students’ relational understanding of the rectangle: a case study
Authors: Fitri K A , Prabawanto S
Published: May 2021

Relational understanding refers to know both what to do and why. In other words, relational understanding is an understanding of all the parts, how they relate, and why they are applied in the manner they are. Previous researches showed that students got difficulties in solving mathematics problem using relational understanding, especially in geometry problems. The purpose of this study was to investigate students’ relational understanding of the rectangle. The subjects of this study were four 8th graders. The data were collected using the student’s worksheets and interviews. This study was conducted in four meetings for every student. Every meeting was held for 30 minutes. The students’ understanding was appraised during the first ten minutes using the rectangle problem followed by interview for twenty minutes. The result of this study showed that the students do not have a relational understanding of the rectangle concept, but only instrumental understanding. Additionally, none of the students understands the relationship between both measurement and square with the area and perimeter of the rectangle concept. Furthermore, the result indicated that the relational understanding of a concept would be not understood well if one of the parts of the concept was ignored.
Implementation of ICT using Hawgent dynamic mathematics software to teach probability
Authors: Wijaya T T , Zhou Y , Purnama A , Yunita W , Mukhlis  , Salamah U
Published: May 2021

Technology is one of the media to enhance the quality of teaching. Technology can cause the teaching-leaming process to be more interactive and less tedious. According to Indonesia’s national examination result, the probability topic still got a low score in the past three years. This data is supported with the observation on junior high school students that students’ mathematics ability towards the basic concept of Probability is still low. This research aims to make education in education to guide Senior High School students to understand Probability. This study uses a mix of research development using the ADDIE model and quasi-experiment to analyze the class that uses technology Hawgent with the class that uses the conventional teaching method. According to this observation, researchers designed technology-based learning using Hawgent to support a Senior High School student to grasp the basic concept of Probability better and improve students’ learning outcomes. According to the validation and discussion, the Hawgent’s development as learning media has been validated by the media and material experts that falls in the excellent category or is applicable. The test result on the students also falls in the satisfying category.
Investigating students’ concept image in understanding variables
Authors: Siagian M D , Suryadi D , Nurlaelah E , Tamur M , Sulastri R
Published: May 2021

Concept image is the overall structure associated with a concept, including all mental images and their related properties and processes. The concept image develops continuously through experience and changes as the individual faces stimulation and maturity. This study aims to analyze and describe the concept image of students in understanding the variable concept. This study is qualitative research with a phenomenological method. Data were collected by means of interviews and tests, then analyzed using the content analysis method. Participants involved in this study were ten eighth-grade students, while the object in this study was students’ concept image in understanding the variable concept. The findings revealed that most of the students understood a variable as something whose value is unknown, whilst some other students comprehend a variable as a substitute for something whose value is unknown. Understanding students’ thinking or concept image provides educators with an insight of the learning process aligned with students’ needs as a way to increase their understanding of mathematical concepts.
The effect of dynamic mathematics software on mathematical problem solving ability
Authors: Lan X , Zhou Y , Wijaya T T , Wu X , Purnama A
Published: May 2021

Mathematics is one of the fields of science that is very important for humans because all science is related to mathematics. One of the skills that should be learned and developed in mathematics is mathematical problem-solving ability. Problem-solving ability is highly needed because humans are always used in everyday life, both in education and daily life. In fact, students’ problem-solving abilities are lacking. This is because mathematical problems created by teachers are not based on indicators of problem-solving ability. Triangle is the important material of two-dimensional figures in elementary school. Teachers need to explain the basic concept of a triangle so that students can master a more difficult concept of a triangle. Dynamic mathematics software can help students grasp the concept of triangles. This study used a quantitative method. This study is a comparison between classes using Hawgent and using conventional methods. The subjects in this study were 72 seventh-grade students in Cianjur, Indonesia. Data were collected based on the results of the pre-test and post-test problem-solving ability. Based on the study results, the class using Hawgent is more good than the class that using the traditional method. Hawgent has been proven to help students understand triangle material.
Evaluation of online learning for mathematics education students
Authors: Siregar G M A , Hidayat  , Sukmawarti  , Siagian M D
Published: May 2021

The Covid-19 pandemic has affected most countries in the world, including universities in Medan, Indonesia. The spread of Covid-19 through social interaction requires the omission of face-to-face learning activities. Based on UNESCO data, 850 million students around the world, including Indonesia, study at home. For the mathematics education students in a private university in Medan, Indonesia, studying at home is a new phenomenon. Students and lecturers must change the learning method without preparation due to the sudden pressure. This article examined this phenomenon. The method used was descriptive qualitative to describe the process of implementing distance learning, the media, and evaluation used in e-learning during the Covid-19 pandemic for mathematics education students. Data collection was conducted by a questionnaire administered to 200 lecturers, interviews, and direct observation. The results show that Group Chat via WhatsApp was the most widely used online communication media, especially the Baby Boomers and Generation X, but millennials used online multimedia more frequently. The implementation has several shortcomings: the lack of interaction between instructors and students, students being asked to learn independently and do independent projects, teachers using more than one media not following the teaching-load hours or spending less time, and many experiencing technical obstacles.
The effectiveness of mathematics learning devices using learning models Interactive Conceptual Instruction (ICI) for junior high school students
Authors: Hanum E L , Anwar  , Hajidin
Published: May 2021

The mandate of the 2013 curriculum states that mathematics subjects aim to make students able to understand concepts. Teachers can plan learning by arranging appropriate learning tools so that students are able to understand the concept. One learning model that emphasizes the concept is the learning model Interactive Conceptual Instruction (ICI). This study aims to determine the effectiveness of mathematics learning tools using thelearning model Interactive Conceptual Instruction (ICI). This study uses the ADDIE development model which consists of five stages, namely analysis, design, development, implementation, and evaluation. Field trials were conducted in five meetings in class VII-B of SMPIT Nurul Fikri Boarding School Aceh. In determining the effectiveness of learning tools, this study uses Nieveen’s criteria. The development results show that the learning device developed using the Interactive Conceptual Instruction (ICI) is effective. The effectiveness is known based on the test of student learning outcomes with a minimum completeness of 85% and the positive response of students to learning using the ICI model. Thus, the learning device using the ICI model is suitable for use by teachers in learning, especially on social arithmetic material at the junior high school level.
The enhancement of student’s mathematical understanding ability through the Aptitude Treatment Interaction (ATI) learning model
Authors: Septiana Ella , Zubainur C M , Ramli M
Published: May 2021

Some teachers pay little attention to the difference in students’ abilities in conducting the learning. Fast-learners feel bored when learning because there is a tendency to repeat the lesson, while slow learners will feel left out because learning tends to be dominated by intelligent students. Therefore, the teachers must accommodate students with different abilities, using a learning model that treats students according to their abilities. The Aptitude Treatment Interaction (ATI) learning model is a solution to assist teachers in helping students master the material taught according to the student’s ability level. This study aims to determine the differences in the increase in the mathematical comprehension of students who take learning using the ATI model and those who take conventional learning. This study involved 51 Year 7 students from one private Islamic Junior High School in Banda Aceh, Indonesia, namely: 25 students in the experimental class and 26 students in the control class. The instrument used was a test of the students’ mathematical understanding ability. Students’ mathematical understanding ability was analyzed using an independent sample t-test. The results showed that students’ mathematical understanding ability who took learning using the ATI model was better than those who took conventional learning.
Characteristics of problems for developing higher-order thinking skills in mathematics
Authors: Makmuri  , Aziz T A , Kharis S A A
Published: May 2021

A large number of studies in the literature have illuminated the issue of higher-order thinking skills with different perspectives. The purpose of the study was to establish a synthesis of the literature on the theoretical basis of higher-order thinking skills in mathematics learning. This study reviews and analyses all resources, including articles published in academic journals and books. Based on a content analysis of selected resources, this article formulates a definition of higher-order thinking skills and proposes ten substantial characteristics of problems for developing students’ higher-order thinking skills in mathematics learning. The present study makes several significant improvements to the field of mathematics education by providing a framework for test construction and an agenda for future research.
The development of a learning media using motion paths in the circle learning material
Authors: Murniasih T R , Suwanti V , Hima L R , Palayukan H , Sirajuddin
Published: May 2021

Motion paths animation in Microsoft PowerPoint has the function of giving animation effects to objects so that the objects move based on the paths that are previously made. This study aims to describe the steps in developing a learning media using motion path animation in the circle learning material. The media development used the ADDIE model, which consisted of five stages: analysis, design, Development, Implementation, and Evaluation. Media validation was carried out by media experts and learning experts. The small group trial was conducted on two students, while the large group trial was conducted on 20 students at a private junior high school in Pasuruan. Based on instrument validation results by learning experts and media experts, the average score was 4.15 (a very valid category). Based on the small group trial and the large group trial, the result was 3.6 and 3.77. The results show that the learning media using motion path animation on circle material is worthy for use in learning.
Didactical design for distance concept in solid geometry to develop mathematical representation ability in vocational high school
Authors: Rahayu E G S , Juandi D , Jupri A
Published: May 2021

This is qualitative research about the didactical design of distance concept in solid geometry, aiming to develop mathematical representation ability. This research employs a qualitative method with didactical design research (DDR) consisting of three stages of the didactical situation: didactical and pedagogical anticipation, metapedadidactical analysis, and retrospective analysis. Hypothetical didactical design was arranged by learning obstacle and hypothetical learning trajectory with the theory of didactical situations. The research subjects were three students of State Vocational High School in Garut as representatives of 30 students who had experience learning Distance Concepts in Solid Geometry and had been given an identification test for learning obstacles. The study identified that learning obstacles are the didactic and epistemological obstacle, which covered five inaccuracies in (1) Students’ ability in presenting concepts in various mathematical representation; (2) Understanding of the concept orthogonal projection between points on a line in the geometry; (3) construct geometric shapes of space to clarify the problem; (4) Understanding students’ visual representations related to the ability to determine the position of a point or a line perpendicular to a line; (5) Understanding of calculation procedures using the Pythagorean theorem and algebraic concepts.
Students’ understanding of mathematical concepts and their self-confidence through a discovery learning model
Authors: Maifi Y K , Anwar  , Ahmad A
Published: May 2021

This study aims to describe students’ understanding of mathematical concepts and self-confidence after implementing the discovery learning model. This study used a qualitative approach with a descriptive type. The participants were four seventh-grade students in one of the junior high schools in Meukek, South Aceh. The instruments used in this study were conceptual understanding tests and a self-confidence questionnaire. Data analysis involved data reduction, data presentation, and drawing conclusions. The results revealed that students’ understanding of mathematical concepts and self-confidence became better after implementing the discovery learning model. The student who initially possessed a low understanding of mathematical concepts had the medium category after learning with the discovery learning model. Out of six indicators of understanding mathematical concepts, four indicators had been fulfilled by students. However, students were still deficient in the indicators of presenting concepts in various representations and linking various mathematical concepts internally or externally. With respect to self-confidence, the findings showed that students met the indicators of act independently in making decisions, good self-concepts, and dare to express opinions, but they still lacked the indicator of believing in their abilities.
A meta-analysis of the last decade STEM implementation: what to learn and where to go
Authors: Tamur M , Fedi S , Sennen E , Marzuki  , Nurjaman A , Ndiung S
Published: May 2021

Comprehensive reviews of STEM (Science, Technology, Engineering, Mathematics) have not been explored much, causing many teachers not to realise the benefits of this approach for students. For that purpose, this meta-analysis study was conducted to understand the overall effect of STEM better. Empirical data were obtained from the ERIC, SAGE, SpringerLink, and Google Scholar databases. The search results found 89 articles published between 2010 and 2020. According to the inclusion criteria, 13 items were eligible for analysis. The analysis tool uses Comprehensive Meta-Analysis (CMA) software, and random effects models are estimated. The results revealed that the overall effect size of the study was 0.73 (standard error 0.14). These results indicate that the application of STEM has a moderate effect on students’ academic abilities. The analysis of the mediator variables reveals that STEM implementation is effective by considering the level of education and sample size. The study’s limitations and implications are discussed to provide vital information for performance and future STEM research.
Self-regulated learning through Contextual Teaching and Learning (CTL) approach
Authors: Merawan C T , Hajidin  , Duskri M
Published: May 2021

Self-regulated learning is essential and must be a concern for teachers in the learning process. Self-regulated learning is one of the affective aspects that play a vital role in achieving mathematics learning outcomes. Students’ self-regulated learning is generally still relatively low. This study aims to determine students’ self-regulated learning through the Contextual Teaching and Learning (CTL) approach. The research sample was eighth-grade students in one of the junior high schools in Banda Aceh. The research instrument was a students’ self-regulated learning questionnaire. Data were analyzed using descriptive statistics. The results showed that most students (55%) had good self-regulated learning after learning with the CTL approach. Besides, 42% of students had sufficient category, and only 3% were in a low category. Overall, students gave a positive response to learning with the CTL approach.
Morphological characterization of some Coffea arabica L. varieties in Gayo Experimental Garden Bener Meriah
Authors: Shara P N , Thomy Z , Anhar A , Harnelly E , Ramlan R R
Published: May 2021

The research on the morphological characterization of arabica coffee varieties (Coffea arabica L.), has been carried out from June 2019 to October 2020 at the Gayo Experimental Garden (KP), Pondok Gajah, Bener Meriah Regency. The purpose of this study is to determine the morphological characterization of arabica coffee varieties (Gayo 1, 2, Ateng Super, C 47, and P 88). This research used a survey method, with purposive sampling by collecting 8 year old arabica coffee plants with a height of 1400-1425 meters above sea level, and each variety was obtained from different garden. To determine the characteristics of Arabica coffee varieties, identification and measurement were carried out. The results showed that there were several differences in the varieties of Gayo 1, 2, Ateng Super, P 88, and C 47. They have different stem diameters with the same height and taproot. Gayo 1, 2, Ateng Super, and P 88 have the same leaf size, while that of C 47 was smaller. The Gayo 1, 2, and Ateng Super have the same flower size, P 88 has larger, and that of C 47 was smaller than the coffee in general. Gayo 1, 2 have standard fruit sizes, while Ateng Super and P 88 has larger, and that of C 47 was smaller than the coffee in general. Gayo 1, 2, Ateng Super, and P 88 have standard bean sizes, while that of C 47 was smaller than the coffee in general.
The Development of natural science module web integrated with local plants toward cooperation skills and environmental care attitude of students
Authors: Devitasari P I , Wilujeng I , Azhary S A , Sadewo M A I
Published: May 2021

The research is about to develop a valid natural science module web integrated local plants on cooperation skills and environmental care attitudes. The research method used is Research and Development which is limited to the developing stage. The research sample was 16 students of 8th grade of Junior High School. The instruments in this study were expert validation sheets, science teacher assessment sheets, peer assessment sheets and students’ readability sheets using a questionnaire with Likert scale. Validation data were analyzed using descriptive analysis. The results of the assessment by experts with the score is 3.6, from science teacher with the score is 3.5, peers review with the score are 3.7, 3.7 and 3.4 and the readability level of students 3.7. All scores are in the excellent category. It can be concluded that the web natural science module can be used in learning. This research is important because it utilizes technology and is integrated with the environment.
Non-invasive measurement of cortisol metabolites in feces as an indicator of stress and its relationship with the number and arrival frequency of visitors in captive sambar deer (Cervus unicolor)
Authors: Gholib G , Jannah P T M , Wahyuni S , Rahmi E , Hanafiah M , Adam M
Published: May 2021

Nowadays, the non-invasive measurement of cortisol in feces is a popular method used as an indicator of stress in wild and captive animals. This study was conducted to examine the feasibility of a non-invasive method for cortisol metabolites measurements in feces and investigate its relationship with the number and arrival frequency of visitors in captive Sambar deer. In total 64 fecal samples were collected together with the observation of the number and arrival frequency of visitors from 7 Sambar deers (3 adult males, 4 adult females) rearing in zoos of Taman Rusa Lamtanjong, Aceh Besar, Indonesia. Subsequently, fecal samples were extracted and the concentration of cortisol was measured by using 3α, 11β-dihydroxy-etiocholanolone assay. Data were analyzed using a t-test and Pearson correlation. Results showed that cortisol metabolites concentration in adult males of Sambar deer (276.20 ± 52.74 ng/g dry feces) was higher compared to adult females (181.56 ± 25.87 ng/g dry feces). The concentration of cortisol metabolites was significantly correlated with the number of visitors ( r = 0.482, p < 0.05 ) and the arrival frequency of visitors ( r = 0.398, p < 0.05 ) in which the higher number and arrival frequency of visitors increased the cortisol metabolites concentration. In conclusion, the concentration of cortisol metabolites in Sambar deer can be measured non-invasively from feces and associated with the number and arrival frequency of visitors.
Agaricales: the most dominated macroscopic fungi in Tahura Pocut Meurah Intan Forest Park
Authors: Kusuma H I , Harnelly E , Thomy Z
Published: May 2021

Agaricales is a group of fungi from the Basidiomycota division which is widely known by the public because it easily grows on various substrates and is widely distributed, especially in the tropics. Most members of this order have an important role in the environment as well as a great economic value. However, research on the Agaricales fungi diversity in Aceh is still rare, especially in Pocut Meurah Intan Forest Park (Tahura PMI). This research contributes to the knowledge about this fungi biodiversity found in Aceh and mainly the PMI Tahura. The aim of this research was to record the diversity of the order Agaricales in the Tahura PMI area. Samples were collected through exploration along the track and identification was carried out based on the morphological and ecological characters. The results obtained showed that 50 species from the order Agaricales were included in 16 families out of 30 genera which were dominated by the Marasmiaceae family and the Marasmius genus. Nine samples were known to have the potential of being used as food, while 6 of them as medicines. This research shows that the Tahura PMI area has a high diversity of Agaricales with potentials that can be utilized for the benefit of mankind in the future.
Statistical optimization of pigment extraction from Acutodesmus reginae sp
Authors: Norazah M N , Asyiqin B N , Suhaiza J , Roshani O , Azmahera G N , Suhaila Y N , Azlin M N
Published: May 2021

Pigment is a natural colorant produced by an organism including microalgae. A locally isolated microalgae, Acutodesmus reginae has shown potential in producing pigments. The intent of this study was to optimize the pigment yield from the unexplored Acutodesmus reginae. Various statistical software for experimental design as tools for optimization offers researcher to plan and able to determine cause and effect relationships in experiment widely applied nowdays. In this study, a 3-level factorial design in response surface method (RSM) used to analyse the effect of factors (type of solvent, extraction time) to determine the optimal parameters for chlorophyll a, chlorophyll b, carotene and phycocyanin pigment extraction yield. A total of 13 run were done using the combination of 95% ethanol, methanol and diethyl ether as the solvents at different extraction time, 15, 30 and 45 minutes. The used of RSM resulted in maximizing the yield of chlorophyll a, chlorophyll b, carotene and phycocyanin at 0.92 μg/mL, 0.64 μg/mL, 0.27 μg/mL and 1.70 μg/mL respectively using 95% ethanol within 45 minutes of homogenization with bead milling assisted. Pigments extraction was done under optimal conditions as predicted by RSM with desirability 0.730 for authentication of the pigment extraction observed. Analysis of the results indicates the experimental values acquired appropriate as the data estimated by the model indicating that the process optimization is reliable to predict the parameter for pigments extraction from Acutodesmus reginae.
How Sharing and Jumping Task affect to student interaction in chemistry learning
Authors: Fibrianto S , Hendayana S , Supriatna A , Oktasari C
Published: May 2021

This research is a qualitative descriptive study which aims to see the effect of sharing learning and jumping tasks on student interactions in the chemistry learning process at high school (SMA) in Subang district. This article will explain how interactions occur between students and teacher interactions with students in group discussions during the chemistry learning process. This research method is Didactical Design Research (DDR). Data collection using observation and recording (video and voice). Learning uses sharing and jumping tasks which are divided into three learning activities, namely opening activities, core activities (sharing and jumping) and closing activities. The results of the study were then transcribed and analyzed using the Transcript Base Lesson Analysis (TBLA) technique, showing that there was student interaction in the form of conversations between students and teachers in groups during the learning process but with different amounts in each learning activity. Most interactions are found in sharing activities, then in jumping task activities, opening activities and interactions at least occur in closing activities. Interaction is in the form of a conversation containing questions and answers between students, student presentations and sharing knowledge among students in groups. This shows that learning sharing and jumping tasks is able to foster good student interaction in learning.
FTIR (Fourier Transform Infra Red) profile of banana corm flour, nutritional value and sensory properties of resulting brownies
Authors: Saragih B , Saragih NAD
Published: May 2021

There is a need for continuous development in the aspect of local food resource utility, especially for rarely used foodstuffs. These include banana corm, with a propensity for processing into flour. The objectives of this study, therefore, were to determine the FTIR profile of banana corm flour and effect of steamed brownies formulated from banana corm and wheat flour, based on the nutritional and sensory properties. Furthermore, Completely Randomized Design with five treatments were adopted during the experiment, including the comparison of banana corm flour:wheat flour at ratio (50:50), (60:40), (70:30), (80:20) and (90:10)%. These individual treatments were replicated three times, and the data obtained were analyzed with ANOVA. Subsequently, samples with significant effect were further evaluated with the Least Significant Difference test at α = 0.05. The FTIR results showed a chemical profile containing phenols, alkanes, alkenes and nitro compounds in banana corm flour, while wheat in contrast showed significantly different moisture, ash, fat, protein, carbohydrate, fiber content, and energy. In addition, the sensory test results indicate the ratio (90:10)% as the panelist’s favored steamed brownies.
Adsorption and decomposition of cationic dye by using goethite-polyacrylate composite
Authors: Kharisma D , Abidin Z , Kusmana C , Suhardiyanto H
Published: May 2021

The adsorption of cationic dye has been widely carried out by using polyacrylate, but it has a low ability to degrade the dye. On other hand, goethite has the opposite properties. This study aims to synthesis the composite of goethite-polyacrylate and its application for adsorption and degradation of methylene blue dye. The composite was synthesized by aging goethite at 40 °C for 7 days, polyacrylate then was added to goethite and the aging process was continued until 21 days. The synthesized composite was characterized by using Fourier Transform Infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The result indicated that the composite has better adsorption capacity compared to goethite with the uptake of adsorbed methylene blue is 625 mg/g. The equilibrium data fit the Langmuir isotherm model correlation efficient higher than 0.99. Goethite-polyacrylate composite efficiently degraded the methylene blue compared to polyacrylate. The combination of goethite and polyacrylate improved the properties of the material which has good adsorption and degradation performance.
User interface evaluation of a real-time gimmick tracking
Authors: Nurwulan N R , Zahirah K F
Published: May 2021

This paper presents the usability evaluation of a gimmick tracking application designed by students in the Human-Computer Interaction class to solve the problem in one of the biggest food companies in Indonesia. Gimmick tracking is important for the company to make sure the gimmick can be transferred to the customers with minimum-to-none problems. The gimmick tracking application should be user-friendly for the users to make sure the application meets the purpose of its development. Quantitative and qualitative usability evaluation using the system usability scale (SUS) questionnaire and think-aloud method were used to evaluate how effective is the real-time gimmick tracking application. A total of 12 subjects with an age range from 18 to 27 from the grocery stores in Malang were recruited to participate in this study. The SUS questionnaire was used to measure the hypotheses related to learnability, efficiency, memorability, errors, user satisfaction, and usability. The qualitative data such as recorded videos and notes were transcribed into the text for further analysis. The SUS score of the design of the gimmick tracking application was 70.83, this score is higher than 55 percent of other applications. Thus, it can be concluded that our design generally has fulfilled all usability requirements.
Development of a person’s facial expression recognition system using a convolutional neural network
Authors: Siregar B , Wirtjes J S , Nababan E B , Fahmi
Published: May 2021

Humans naturally and intuitively use important and powerful facial expressions to communicate and show their emotions during social interactions. In that interaction, the effort to interpret someone’s emotional condition is important in good communication. A person’s emotional condition is reflected in the form of words, gestures, and especially facial expressions. Although humans can recognize expressions well, research on expression recognition carried out by machines is continuously being carried out in order to be able to carry out expression recognition in human and computer interactions. This research conducted facial expression recognition using the Convolutional Neural Network method. To perform facial expression recognition, the Convolutional Neural Network is trained with expression image data. The training process is carried out using different optimizer values, batch size, and epoch to get the best model. To overcome overfitting, data augmentation was carried out on training data and validation data. The experimental results in this research indicate that the system method built is able to recognize a person’s facial expressions with an accuracy rate of 80%.
Development of Aceh biodiversity information system
Authors: Subianto M , Afidh R P F , Harnelly E
Published: May 2021

Aceh is rich in biodiversity, both flora, and fauna. Aceh’s biodiversity has not been well documented. This can be seen from the absence of an information system that is open to the public regarding biodiversity in Aceh. This study aims to develop a web-based Aceh Biodiversity Information System of Aceh Biodiversity. This Aceh Biodiversity Information System will collect data on biodiversity in Aceh from various parties, including researchers, academics, government, and the general public. The waterfall model as the Software Development Life Cycle (SDLC) model is used in the development of this information system. The System Usability Scale (SUS) is used to determine user opinions in using this information system as input for improvement. The results showed that this information system was good enough to accommodate the data collection process from various parties. Improvements to the existing features used in this information system need to be done. It is hoped that these Aceh Biodiversity Information System can be utilized as a data collector for the education, research, management, conservation, and other fields of a task, especially bioinformatics.
A review of mathematical modelling in educational research in Indonesia
Authors: Vitoria L , Ramli Marwan , Johar R , Mawarpury M
Published: May 2021

Mathematical models are mathematical representations of real-life problems which are used to simplify the problems and also for future prediction. Mathematical modelling has been used in educational research around the world mainly to predict students’ academic performance and to identify essential factors that affect students’ learning. However, in Indonesia there are very few published researches that employ mathematical modelling for educational studies. The present study is an integrative review conducted to document these studies. The objective is to provide an overview of the usage of mathematical modelling in educational research in Indonesia. The method of the review follows Torraco’s guidelines of integrative review which consist of critical analysis and synthesis. Five open-access published articles were discovered. These articles were written either in English or in Bahasa Indonesia. 3 out of 5 articles focused on explaining several predictor variables that influence student performance. The other 2 articles focused on comparing different methods of modelling to predict student performance. These findings show that mathematical modelling has not been extensively utilized in educational research in Indonesia.
Analysis TPACK framework in ISLE-based STEM approach model: case study
Authors: Sari I M , Yusibani E , Irwandi I , Sofyan H , Suherman
Published: May 2021

TPACK is a framework that integrates technological knowledge, pedagogical knowledge, and content knowledge in a learning context. This article discusses the analysis of the TPACK framework in the application of the ISLE-based STEM approach for the case of mass-spring oscillations. The successful application of the ISLE-based STEM approach model in learning activities must start from increasing the TPACK ability. However, TPACK and ISLE-based STEM information are currently still limited, so it is necessary to conduct a study to analyze the TPACK relationship through the development of ISLE-based STEM learning instruments. This research was conducted based on the development of learning media, namely a prototype of spring vibrations using MEMS and IoT technology as well as student worksheets designed with an ISLE-based STEM approach model by the STEM Research Center of Universitas Syiah Kuala. The analysis results show that the application of TPACK through the ISLE-based STEM model approach requires a complex process. This information is a step in the development and assessment of ISLE-based STEM learning media on the TPACK framework to strengthen 21st-century skills.
STEM Outreach Program: An evaluation on students’ perspective towards STEM engagement via school-university mentoring partnership
Authors: Azman H H , Maniyam M N , Yaacob N S , Nawawi N M , Samah N N A , Alias R , Hassan K B , Kamaruddin H H , Khalid R M , Sout N M , I M , Abdullah H , Suliman N A , Moid M M , Yunus Y M , Latib L A , Idris N
Published: May 2021

The number of students pursuing science and engineering is reducing drastically over the years which is of great concern to the country. Hence, in 2011, the Malaysia Education Blueprint was initiated emphasizing on the role of STEM for establishing a scientific and innovative society. The National STEM Movement has taken the step forward to make the blueprint a reality by initiating the STEM Mentor-Mentee program in schools facilitated by universities. Universiti Selangor (Unisel) contributed actively through the participation of lecturers as facilitators and students as mentors. Fondly known as the Unisel Fun with STEM program, the team has shared their modules with seven schools in Selangor. This particular study is focusing on one of the schools, SMK Sungai Burong involving 60 students and 3 teachers, assessing the effectiveness of the module and the impact of mentoring approach. A five Likert scale survey was conducted at the end of the program with each of the four domains received positive feedback. The program itself was well-executed with the mean score of 4.24. The response towards the mentoring approach was very favourable, resulting in the mean score of 4.61. This outreach program is considered effective as students demonstrated positive attitude towards the module and STEM field.
Analysing students’ feedback: Their motivations and interests in STEM-based learning
Authors: Artika W , Mailizar  , Handayani D , Yulisman H , Nurina CIE
Published: May 2021

Student motivation and interest are essential components that contribute to the successful application of STEM-based learning, and they can be obtained through students’ feedback. Through feedback analysis, this study aims to obtain information about students’ motivation and interest in STEM-based learning activities. This survey research was conducted at one of Islamic high school in Aceh province. The research instrument was in the form of open-ended questions, amounting to four questions. Data were analyzed using an inductive approach. The results showed that students considered STEM-based learning to be fascinating because it trained them to think critically, creatively, and systematically, and relate to the real world. They also want to learn more about STEM-based biology learning. On the other hand, they think that teachers need to pay attention to learning facilities and techniques when carrying out STEM-based learning activities so that learning can run effectively. The results of this study inform teachers, lecturers, and education administrators to design effective STEM-based learning activities.
The impact of STEM PjBL on students’ engineering practice, scientific practice, and scientific attitude
Authors: Admawati H , Jumadi J
Published: May 2021

The study aimed to analyze the effect of Science Technology Engineering and Mathematics (STEM) Project-based Learning (PjBL) on students’ engineering practice, scientific practice, and scientific attitude. Scientific and engineering practice in this research focused on the planning and carrying out investigations (PCOI) aspect and obtaining, evaluating, and communicating information (OECI) aspect. This study employed the pretest-posttest control group design of experimental research. In this study, 70 of 8th-grade junior high school students in Yogyakarta were determined by a simple random sampling technique to become subjects. Data were obtained through (1) a multiple-choice test to measure the planning investigation and obtaining, evaluating, and communicating information as cognitive domains, (2) an observation sheet to observe the carrying out investigation as a psychomotor domain, (3) a questionnaire to obtain students’ scientific attitude of this study. The test instrument, the observation sheet, and the questionnaire had been developed and validated. Data from this study were analyzed by MANOVA in SPSS 16. The result of this study showed that STEM PjBL effected students’ scientific practice, engineering practice, and scientific attitude.
Effectiveness of visual programming implementation in thermodynamic experiments with the ISLE-based STEM approach model
Authors: Hasrati H , Ilyas S , Irwandi I , Munawir Al , Kaosaiyaporn O
Published: May 2021

Visual programming utilizes visual presentation to describe programs, data, structures, or dynamic behavior of complex systems. Labview is a visual programming software made by national instruments using language based on graphics or block diagrams. Labview is applied to thermodynamic experiments to see the effectiveness of the implementation in students learning through the ISLE-based STEM approach. Experiments by the students were finding the specific heating value and discovering the concept of the Black principle by utilizing the Dallas 18B20 as a temperature sensor that is connected through the NodeMCU ESP8266 device and Labview software. This research was conducted at SMA LabSchool Unsyiah with a total of 10 students participated following the pandemic protocol procedure. The data analysis results showed that 85% of students were happy with the learning approach, 80% of students were interested in the teaching materials, 78% of students stated that the experiments were effective for learning the concepts, 90% of students stated that they developed thinking skills. Students get an increase in scores on the post-test as much as 89% from the results of the pre-test. The assessment of the implementation of learning by the observer obtained a mean of 80.5%.
Improving ISLE-based STEM learning outcomes for building the 21st century skills and characters through a lesson study: A case study on Torque and Moment of Inertia
Authors: Ulfa Z , Irwandi I , Syukri M , Munawir Al , Halim A
Published: May 2021

The objectives of this study are as follows: (1) Developing ISLE-based STEM learning media, (2) Building 21st-century skills and character, (3) Analyzing the improvement of learning outcomes through lesson study. This research is a descriptive quantitative study developed at the STEM UNSYIAH Research Center and carried out at Unsyiah Laboratory High School. The instruments used in this study are validation rubric for media and material experts and Teacher Observation sheets and monitoring sheets for the increasing 21st-century character. Based on the data analysis: 1) Validation of the Moment of Inertia props from 2 media experts obtained an average percentage value of 86.4% with an excellent category. 2) Validation of Student Worksheet by two validators expert in material teaching obtained an average percentage value of 84.77% with an excellent category. 3) The teaching and learning results using teaching aids and LKPD through a Lesson Study conducted by the observer obtained a percentage with an average of 83.5% excellent category. 4) There is an increase in 21st-century character in students by 77% with an excellent category. ISLE-based STEM Learning Media is very suitable for improving 21st-century skills.
Effect of concept attainment model on student’s science process skills
Authors: Halim A , Farada S , Hamid A , Mustafa  , Nurulwati  , Mahzum E , Irwandi I
Published: May 2021

The research objective was to determine the effect of the concept approach model on students’ science process skills. The type of research used is experimental research with pre-experimental methods and one group pre-test post-test design. The research sample was selected for grade I at Peukan Bada Senior High School. Data collection used non-test instruments in the form of observation sheets to see students’ science process skills. The results of data analysis using the percentage formula showed an increase in science process skills from the first meeting to the third meeting. At the first meeting, the average percentage was 54.66%, which was categorized as sufficient, at the second meeting it was 76.66% which was categorized as good, while at the third meeting it was 84.47% which was categorized as very good. The indicators of science process skills with the highest improvement were observation, interpretation, prediction, and concept application. Meanwhile, the lowest indicators are classification, experimental design, and communication.