bluuebunny/crossref_metadata_2025_split huggingface dataset:
A need analysis for the development of augmented reality based-geometry teaching instruments in junior high schools
Authors: Lainufar  , Mailizar  , Johar R 
Published: March 2020

Abstract
Previous studies have shown that augmented reality (AR) is an interactive teaching media that can improve students’ learning motivation and spatial ability. Many studies have discussed AR technology and GeoGebra App but there are no previous studies on developing and using GeoGebra AR-based teaching instruments to improve students’ spatial abilities in mathematics. The purpose of this study to develop valid and practical GeoGebra AR-based teaching instruments on geometry and used the Plomp model. This paper only reports the findings on the preliminary research. The research participants were three vice-principals of curriculum, three mathematics teachers and six-year 8 students who were randomly selected. The data were collected by administering questionnaires, interviews, and observations, and then analyzed descriptively. The result of this study indicated that the mathematics learning process on geometry topics in years 8 could be improved through GeoGebra AR-based teaching instruments. Moreover, students’ abilities were sufficient to use it. In conclusion, students and teachers need GeoGebra AR-based teaching instruments in geometry learning. The results of this study can be used as theoretical and empirical references for the next stage of development.
The integration of local context through problem-based learning (PBL) to improve junior high school students problem-solving skills
Authors: Hayati U , Johar R , Marwan  
Published: March 2020

Abstract
Students face difficulties in understanding problems because they are presented in the text book without the contexts familiar to the students. This study aimed to examine and descriptively describe the effectiveness of the integration of local contexts through the PBL model to improve students’ problem-solving skills. This research was done by developing the learning instruments integrating the local contexts through the PBL model based on Dick and Carey models. The learning instruments that are valid, practical, and effective were developed by referring to the Dick and Carey model. This paper discussed the results of the effectiveness test of PBL learning instruments integrating the local contexts. The effectiveness test was conducted for Year 7 students at one of the junior high school in Meureudu, Pidie Jaya, Indonesia. The instruments of this study were the student worksheet, observation questionnaire to investigate student learning activities, problem-solving skills test, student questionnaire, observer questionnaire. The results showed that effectiveness criteria to the learning instruments developed had been fulfilled so that they were effective to use, and students problem-solving skills had improved. It is hoped that the trial of the learning instruments can be conducted at some schools with similar characteristics.
The optimism of junior high school students in mathematical problem posing
Authors: Zulfikar  , Anwar  , Yusrizal  
Published: March 2020

Abstract
One role of optimism is to examine how students solve problems in learning mathematics. However, there is still limited research that reveals students’ optimism in posing mathematical problems. This study aims to describe the dimensions of students’ optimism in the mathematical problem posing. This research employed a qualitative method. The research subjects consisted of four Year 8 students (two low-achieving and two middle-achieving students in posing a problem) of one Islamic junior high school in Pidie Jaya, Aceh, Indonesia. The subjects were selected purposively based on their ability to raise problems related to the rectangular pyramid topic. To examine the dimensions of students’ optimism, the researchers interviewed the subjects by referring to optimism indicators proposed by Seligman: permanent bad-events, pervasive bad-events, personal bad-events, permanent good-events, pervasive-good events, and personal good-events. The results showed that: (1) although students have the same problem-posing abilities, they were in a different dimension of optimism, (2) students who had moderate problem-posing abilities were more optimistic than students with low problem-posing abilities, (3) students who had low or moderate problem posing skill tend to be in the pervasive bad event-dimension. In summary, optimism affects the students’ ability to pose mathematical problems.
Students’ worksheet on circular cylinder topic using GeoGebra software through Discovery Learning model
Authors: Mursyidah  , Anwar  , Subianto M 
Published: March 2020

Abstract
Students’ worksheet is a sheet that contains material, descriptions, work steps, and exercises to help students comprehend and discover the concept of learning materials. But in fact, students’ worksheets do not work well in schools yet. Students’ worksheets only contain materials and exercises, not including the components of good students’ worksheets. Therefore, it is necessary to develop students’ worksheets which could help students to find their own concepts. This study aims to develop valid and practical students’ worksheets based on discovery learning model employing GeoGebra in the topic of circular cylinder. This study was held at Year 9 on junior high school. The study is developmental research with ADDIE model, which consists of 5 steps: analysis, design, development, implementation, and evaluation. The research used validity and practicality instruments to assess students’ worksheet. The validity instrument includes the assessment sheets for student worksheet and practical instrument includes student and teacher response questionnaires. The results showed that the students’ worksheet fulfilled criteria (1) valid within the average score 4.5 of 5 for students’ worksheets; and (2) practical with student response questionnaire average score of 88% and teacher response questionnaire average score 4.5 of 5.
Students’ metacognitive abilities in solving derivative problems
Authors: Anjelina Z , Usman  , Marwan  
Published: March 2020

Abstract
Students need skills and solving strategies to solve mathematical problems. One of the strategies that students should have is metacognition. Metacognitive ability plays an important role in avoiding errors and allows students to use their prior knowledge and certain strategies in solving mathematical problems. This research is a preliminary study that aims to describe students’ metacognitive abilities in mathematical problem solving. The participants in this study were 28 students of an Islamic senior high school in Banda Aceh, Indonesia. Data collection conducted in this study was tests and interviews analysed descriptively. This study found that most students satisfied the planning indicator of metacognitive abilities in mathematical problem solving. Furthermore, some students met the monitoring indicator, even though their answers were not perfect, and some reached the evaluation indicator. Students’ metacognitive abilities in solving mathematical problems can be improved; one of the ways is applying problem-based learning model.
The development of learning tools using treffinger model assisted by geogebra to enhance students’ creativity
Authors: Elvita A , Johar R , Abidin T F 
Published: March 2020

Abstract
The development of the Treffinger model learning tools in enhancing the creativity of high school students assisted by GeoGebra software aimed to produce valid, practical and effective mathematics learning tools. This study was development research adopted the development model of Dick and Carey. The subjects were 22 Grade 11 students in one of the Islamic High Schools in Aceh• The data was the validation results and the results of the practical and effectiveness tests. Based on the validity test, the average scores of the lesson plan, student worksheet and test of learning outcome were 3.89, 3.82 and 3.55, respectively, indicating that the tools developed were valid. Based on the results of the pilot test, the practicality criteria were met based on the results of the observer’s assessment of the learning implementation categorized as practical and the mean of the students’ activities also satisfied practical criteria. The effectiveness criteria were also fulfilled based on the scores of the group worksheet and the scores of the student learning outcome test (meeting the minimum criteria of mastery learning). Hence, the learning tools developed were valid, practical and effective.
The effectiveness of local instruction theory for solid geometry topic using a realistic mathematics education approach
Authors: Vazila M , Zubainur C M , Johar R , Ariani D 
Published: March 2020

Abstract
One of the efforts carried out to improve problem-solving in solid geometry is by using a realistic mathematics education approach. The Curriculum 2013 mandates the solid geometry learning in Year 5 of elementary school involving solving problems related to their traditions or local culture. This research aimed to examine the relevance of the LIT of solid geometry material between the Curriculum 2013 (revised 2016) and the Curriculum 2013 (revised 2014) and to review the effectiveness of LIT. This research employed a qualitative approach using the design research method consisting of three phases, namely: preparing, Hypothetical Learning Trajectory (HLT) test, and retrospective analysis. The pilot project was carried out in the Year 5 of three elementary schools located in Pidie District. The instruments involved student worksheet, student activity observation sheet, student conformity sheet comparing the observed and expected activity, problem-solving skill test, student questionnaire, and teacher questionnaire. The results indicated that: 1) The LIT of geometry topic of the Curriculum 2013 (revised 2016) was relevant to Curriculum 2013 (revised 2014), 2) The LIT developed satisfied six effectiveness indicators. Thus, the LIT developed can be disseminated to be used by elementary school teachers at schools.
The correlation between supervisor’s h-index and the number of PMDSU student’s publications
Authors: Rizal S , Puruhito  , Elfindri  , Nugroho W S , Ahza A B , Subekti A , Lakitan B , Soemardi B W , Irianto S , Mart T , Ikhwan M 
Published: March 2020

Abstract
Integrated Master-Doctor program for excellent undergraduate student (Pendidikan Magister Menuju Doktor untuk Sarjana Unggul hereafter PMDSU) is a government program in the effort to increase the number of doctors and the number of international publications for doctoral supervisors in Indonesia. The program has been running since 2013 and has received students in 4 batches until 2018. Based on the year of entry, PMDSU batch I should have completed the study and PMDSU batch II has entered its final year. From that endeavour, this paper describes the achievements of PMDSU student and supervisor’s publications. The hypothesis raised is the number of publications and supervisor’s h-index influences the number of joint scientific publications between students and supervisor for batch I and II. PMDSU students and supervisors batch I and batch II are spread across 12 educational institutions in Indonesia. The findings show that the highest number of student’s publication is 17 articles. The level of participation of PMDSU students in scientific articles reaches 60% of 323 registered students. Based on student participation, an increase in the number of supervisor’s scientific articles was influenced weakly by the participation of PMDSU students. At the other hand, the supervisor’s h-index is also very weak in influencing the number of publications published by PMDSU students. Based on the results obtained, student’s participation can slightly increase the number of supervisor scientific articles, and the supervisor’s h-index has no relation to the number of publications published by PMDSU students.
Pandanus amaryllifolius Roxb. leaf extract prepared by nanoemulsion technique as a natural mouthwash
Authors: Safrida S , Khairil K , Artika W , Rinaldi R 
Published: March 2020

Abstract

Pandanus amaryllifolius Roxb. leaf has a natural mouthwash used as an alternative to commercial mouthwash. The purpose of this study was to determine the potential of giving scented Pandan leaf extract (Pandanus amaryllifolius Roxb.) using nanoemulsion technique as a natural mouthwash. This study used an experimental method with a trial of Completely Randomized Design (CRD) with five treatments and five replications. Data were analysed using Analysis of variance Test and Duncan at α=0.01 (99% confidence level). The result of giving 21-day natural mouthwash showed that P3 (4% extract) has the average salivary pH higher than the value of P1 (1% extract) and P2 (2 % extract), and the average salivary pH value of P3 (4% extract) approached the average salivary pH of P0+ (commercial mouthwash). Besides, there was a significant effect of 21-day of treatment to the respondents that is showed by F (4.20) = 20.57, ρ (0.01) = 4.43. The conclusion of this study is the administration of P amaryllifolius extract with nanoemulsion technique can be used as a natural mouthwash which is to maintain the salivary pH.
The importance of forests as microclimate refuges for mammals in Sumatra
Authors: Slater H , Abdullah A 
Published: March 2020

Abstract
The forests of Aceh are key habitat for several iconic, but critically endangered Sumatran mammals. Preserving these forests is vital to ensuring the continued survival of these species. In addition to the immediate threats of habitat loss and degradation, hunting and human-wildlife conflict, climate change will present further challenges to mammal conservation. A major focus of ecological research is to predict species ranges under future climate change using species distribution models, which correlate existing species distributions with environmental data. This enables us to identify and prioritise the most vulnerable habitats and species for protection, restoration or relocation and ensure the best use of limited resources. Producing these models in Sumatra is challenging due to a lack of species data and accurate environmental data. Furthermore, climatic conditions under tropical forest canopy are significantly cooler and less variable than background macroclimate conditions and can shield mammals from climatic extremes. This decoupling effect has been observed in both primary and secondary forests, although the full extent to which human activities is not known. Identifying microclimate refuges and characteristics which promote thermal buffering of forests will favour long-term mammal conservation under climate change by identifying key locations for habitat protection and restoration to protect climate sensitive species from climate extremes.
Trends, patterns, and the relationship of computer-based national examination of high school science students
Authors: Nasution M K , Surbakti A H 
Published: March 2020

Abstract
This study provides an initial statistical approach as an alternative model to detect the fraudulent practice estimation of national examination (NE). Trends, patterns, and relationships were analysed from the national examination (NE) scores and the national examination integrity index (NEII) on pre-and post-computer-based national examination (CBNE) of the 103,273 high school science students in Aceh Province. Looking at the trends and patterns of the pre-post CBNE implementation, descriptive statistics were used by comparing the average (Mean) of the NE, NEII, and the standard deviation of national examination (SDNE) in the group of regencies/cities. Picturing the relationship between the NE and NEII, linear regression and curve estimation was applied. The result shows that there are striking differences and gradual changes between the pre-post CBNE’s implementation in each regency/city. In the span of three years (2015-2017), a downward trend showed in the NE’s scores along with the implementation of CBNE which increased the NEII’s value. In the pre-CBNE period (2015), a striking pattern emerged in the form of low NEII, high NE, and low SDNE which indicated the existence of fraudulent practice estimation of the national examination.
Construct validity of digital media literacy instrument for student teachers
Authors: Sari C M W , Huda I , Pada A U T , Rahmatan H , Samingan  
Published: March 2020

Abstract
To measure the level of media literacy, a measuring instrument in the form of an assessment is needed. The instruments used in the study were adopted from Son which is a non-test in the form of a closed questionnaire that had been revised and validated with the conditions of students in Banda Aceh. The study aims to examine construct validity of digital media literacy instruments used. The population in the study was 242 student teachers in Biology Education Department at a public university in Banda Aceh. The sample were 168 students selected using purposive sampling. The study applied CFA method. The results of construct validity of the instrument that can be seen in the validity of all the observed variables were good with tvalue > 2 and SLF >0.3. Moreover, the construct reliability were categorized very high (0.80<CR 1.00) and high (0.60<CR0.80). This indicates that the instrument can be used to measure the level of digital media literacy of student teachers.
Human reproductive system module based on Qur’an and hadith to improve students’ motivation and learning outcomes
Authors: Agusti D , Rahmatan H , Sulastri S 
Published: March 2020

AbstractThis research was carried out on the development of learning modules about the human reproductive system based on the Quran and hadiths in West Labuhanhaji at a junior high school to improve students’ motivation and learning outcomes. The research and development method (R&D) with a Borg and Gall model was used in this study. The research population was students of class IX at in West Labuhanhaji, by a total of 92 students. A sample of 48 people was obtained through a purposive sampling technique. Data collection used test questions and motivation questionnaires. Data analysis was performed by using a t-test, with the acquisition of tcount> ttableat a significance level of 0.05 at 6.414>1.71, which means that there were significant differences in learning outcomes between the experimental and the control class. Learning motivation was assessed by using the self-determination method resulting in an average value of 4.69, meaning it is in a very good category. The results of the correlation between motivation and learning outcomes showed the value of tcount > ttable which was 4.227> 1.71 with the value of r approached +1 was 0.667 which means there was a positive correlation between motivation and learning outcomes.
Bioturbation of Thalassina anomala and microhabitat in mangrove ecosystem at Sungai Reuleung Leupung Aceh Besar
Authors: Ali S M , Zulfikar  , Saputri M , Frias J C 
Published: March 2020

Abstract
The purposes of this study are to determine daily amount of land transported by the Thalassina anomala species in the mangrove ecosystem at Sungai Reuleung Leupung and determine the characteristics of bioturbation, the correlation between body size and the amount of soil transported by T. anomala and also to see the characteristics of microhabitat. The research was conducted from July 2017 until August 2017. The observation was carried out by dividing into five stations through survey methods with purposive sampling technique. The Pearson Correlation formula was applied to analyzing the effect of biosturbation activities on the environment. Environmental factors in Mud Lobster habitat are water temperature around 25°C31°C, air temperature 25°C-33°C, salinity around 17-22 %o, and soil pH ranges from 5-7,2, and water pH ranges from 5-7,4. The results show that bioturbation activities were influenced by body size, soil density and the effect of microhabitat. The average of land transported by T. anomala was 163, 82 grams from a total of 95 excreted soils with a moderate correlation of 0,535. Based on the results, it can be revealed that the capacity of land transported by T. anomala has the potential to affect surface of the mangrove ecosystem.
The application of guided-inquiry-learning to enhance science process skills and student learning outcomes
Authors: Zahrina  , Gani A , Yusrizal  
Published: March 2020

Abstract
This study aims to identify the increase achieved in science process skills (SPS) and student learning outcomes after the implementation of guided-inquiry learning compared with the lecturing method. The SPS correlation to learning outcomes, along with the responses, was also determined. This study employed the experimental method with pretest posttest design with a control group. The sample of 61 students was selected by purposive sampling technique. The results obtained of the SPS hypothesis test data analysis and learning outcomes were tcount of 2.838 and 4.863>2.001 ttable, which means there are differences in SPS and learning outcomes of students between the group treated with guided-inquiry learning and that treated with lecturing method. There is a correlation between SPS and learning outcomes, as evidenced by tcount 3.12>2.04 ttable at the value of r2 0.509 in the medium category. Then, the students’ and teachers’ response with “yes” answers obtained a percentage of 87.22 (interested) and 100 (highly interested). It can be concluded that SPS and learning outcomes using guidedinquiry strategies are better than lecturing method; besides, and SPS method has a positive impact on student learning outcomes, and the students responded positively to the implementation of guided-inquiry learning.
The ability of biology teachers to manage a classroom based on Lesson Study learning model
Authors: Hasanuddin H , Nurmaliah C , Samingan S , Iswadi I , Artika W 
Published: March 2020

Abstract
Lesson study is a model of teacher professional development through the study of learning and capacity building of knowledge. This study aimed to determine the ability of a biology teacher at SMAN 1 Meureudu in implementing a lesson study in the classroom. The experiment was conducted from July to September 2015. The Data was obtained through the observation sheet of the learning process, including six indicators of introduction activity aspect, 28 indicators of core activities aspect, and four indicators of the final activity aspect. Learning management was carried out in three stages of lesson study. The results of the first stage of open and post activities were went less well with an average score of 2.33 and 2.25 respectively. An Improvement was being exposed at the introduction aspect during the second stage of the open lesson with an average score of 2.83 (good category). Then, the post-lesson aspect also improved at the third stage of open lesson with an average score of 3.0 (good category). It is concluded that the ability of the biology teacher at SMA Negeri 1 Meureudu to manage classroom had improved after the third stage of the open lesson implementation with good category (average score 2.88).