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31	Chemistry Education	ABS-60
Implementation of PCT (Paper Chromatography Techniques) Practicum Media on Student Learning Outcomes on Mixed Separation Materials Mellyta Uliyandari- Emilia Candrawati Universitas Bengkulu Abstract This study aims to see the effect of implementing PCT (Paper Chromatography Techniques) practicum media on student learning outcomes on mixed separation materials. This research is a type of research and development (Research and Development). Based on the results of the study, it is known that there has been an increase in student learning outcomes after using PCT (Paper Chromatography Techniques) Practicum Media, this can be seen from the comparison of students^ pretest and posttest scores. The average pretest score of students before using PCT practicum media was 50.84 while the average posttest score of students after using PCT media was 81.32. The results of the students^ pretest and posttest were tested for gain or gain score by comparing the students^ average pretest and posttest scores. The gain score obtained is 0.61 in the ^medium^ category. Keywords: learning media, PCT, android based, mix separation Share Link | Plain Format | Corresponding Author (Mellyta Uliyandari)

32	Chemistry Education	ABS-71
CONNECTING STUDENTS CRITICAL THINKING SKILLS WITH CONCEPTUAL KNOWLEDGE IN LEARNING THE ORGANIC COMPOUNDS STABILITY BY USING MARVINSKETCH AS A TOOLS TO ADJUST THE ERA OF SOCIETY 5.0 Lusia Narsia Amsad1, Liliasari2, Asep Kadarohman2, Ratnaningsih Eko Sardjono2 1Universitas Cenderawasih 2. Universitas Pendidikan Indonesia Abstract In order to learning about organic compound stability in era of society 5.0, students have to integrate their conceptual knowledge and ability to work with technologies as a tools. It is also need plentiful skill, such as critical thinking. This research want to find the connection between students critical thinking and conceptual knowledge using Marvin sketch. The students must connect all the knowledge and skills with technologies using Marvin sketch to understand the stability of organic compound. The participant were 18 students from one state university in Indonesia. The study was using descriptive research, It used the nonparametric correlation test. The result show there is a connection between students conceptual knowledge with the critical thinking skill. It found that the Marvin sketch as a tools have the impact in learning the stability of organic compounds. Keywords: Conceptual Knowledge, Critical Thinking Skill, Stability of Organic Compound, Marvin sketch, Society 5.0 Share Link | Plain Format | Corresponding Author (Lusia Narsia Amsad)

33	Chemistry Education	ABS-77
The effect of using Chemdroid media on students^ self-efficacy in thermochemistry topic Febrian Solikhin and Andang Wijanarko 1 Program Studi Pendidikan Kimia, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia 2 Program Studi Sistem Informasi, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia Abstract This study aims to determine the effect of using Chemdroid (Chemistry on Android) media on students^ self-efficacy in thermochemical topic. This type of research is a quasi-experimental research with a post-test only design. The class used is 2 classes. The first class is a control class with conventional learning as usual, while the second class is an experimental class with learning using Chemdroid media. The instrument used is a self-efficacy measuring instrument consisting of 22 statement items. The results of the analysis stated that the value of sig 0.002 < 0.05 means that there is an average difference between the control class and the experimental class. Keywords: chemdroid media, quasi-experiment, thermochemistry Share Link | Plain Format | Corresponding Author (Febrian Solikhin)

34	Chemistry Education	ABS-81
DEVELOPMENT OF ANDROID-BASED MOBILE LEARNING TO IMPROVE STUDENTS^ SCIENCE LITERATURE IN CHEMISTRY LEARNING Meydia Afrina (a*), Harry Firman (b), Septian Karyana (b) (a) SMA Negeri 9 Bengkulu Selatan Jl. Raya Kelutum Bengkulu Selatan, Bengkulu, Indonesia *afrinameydia[at]gmail.com (b) Seameo Qitep in Science Jl. Diponegoro 12, Bandung, Indonesia Abstract The subject of colloid system taught in class XI is a subject matter that is very closely related to phenomena in everyday life. For that we need a media that is able to convey information accurately, clearly and pleasantly so that the concept of the material is conveyed to students so that students understand the colloid system material. Mobile learning developed is an Android-based learning media that uses smart apps creator software. In this mobile learning there are several features, namely competencies, materials, videos, evaluations, libraries and developers that can be accessed with Android. This study aims to determine the characteristics of Android-based mobile learning that was developed, to determine the effect of Android-based mobile learning to student activity, and to determine the effectiveness of Android-based mobile learning to improve students^ scientific literacy in chemistry learning. This type of research is research and development with a development model of analysis, design, development, implementation, evaluation (ADDIE). Data were collected by means of response questionnaires, validation questionnaires, and scientific literacy tests. The data were analyzed with the percentage that met the requirements, qualified categorization, and the N-gain test. Practitioner and student responses were highly qualified with 80.95% and 89.02%, respectively. The effectiveness trial obtained 0.62 N-gain with medium category. It can be concluded that android-based mobile learning is effective for improving students^ scientific literacy on colloidal system material. Keywords: Mobile Learning, Android, Colloidal System, Scientific Literacy Share Link | Plain Format | Corresponding Author (Meydia Afrina)

35	Chemistry Education	ABS-82
Implementing the powerpoint 2010 and phet simulation media with modification of reciprocal teaching approach in inorganic chemistry materials Wiwit* and H Amir Program Studi Pendidikan Kimia, Universitas Bengkulu, Jalan W.R. Supratman, Kota Bengkulu 38122, Indonesia Abstract This study aims to improve the learning outcomes and responses of undergraduate students in implementing the PowerPoint 2010 and PheT Simulation media with modification of reciprocal teaching approach. This study was conducted on classroom action research. The subjects were forty-four undergraduate students of the Chemical Education Department of the University of Bengkulu who took the Inorganic Chemistry course in academic year 2016/2017. This research was addressed in three cycles, where each cycle consisted of four stages: plan, action, observation, and reflection. Quantitative data was gathered from the test, while the qualitative data were from the observation sheets. The results showed an increase in learning outcomes of the students from the first to the third cycle, which were 72.1, 73.6, and 80.7. On the other hand, the responses to the media and approach used in this study for three cycles were in good categories. Thus, it showed that the improvement of the knowledge of undergraduate students in Inorganic Chemistry materials. Keywords: learning outcome, response, PowerPoint 2010 and PheT Simulation media, modification of reciprocal teaching approach Share Link | Plain Format | Corresponding Author (Wiwit Alwi)

36	Chemistry Education	ABS-84
The Development of Android-based Learning Media for Organic Chemistry I Dewi Handayani (a*), Sura Menda Ginting (a), Muzanip Alperi (b) a) Program Studi Pendidikan Kimia, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu. Indonesia *d.handayani[at]unib.ac.id b) LPMP Provinsi Bengkulu, Jl. Zainul Arifin Bengkulu. Indonesia Abstract Industrial revolution 4.0 has a distinct feature which is utilization of technology in learning process, and electronic media (android based) usage is being one of them. The aim of this reasearch is to analyzing android-based learning media feasibility which was developed using Microsoft Office PowerPoint, in combination with iSpring Suite 10 and Website 2 Apk Bulider. The research was conducted in University of Bengkulu with the subjects were chemistry education students that are enrolled in Organic Chemistry I, 2021/2022 academic year. The research used three out of 4-D type of development model which were Define, Design, Develop and Disseminate. The Disseminate part of the model was left out due to time constriction. The research instrumentation were validation questionnaires for both organic chemistry content and the media itself. The questionnaires were given to 4 experts, which 2 being the expert of organic chemistry subject matter and the other two were learning media practitioners. The results of questionnaire analysis shown that the android-based media on Organic Chemistry I subject is a feasible learning media with the scores of 89,2% and 87,5% for content and media category respectively. The scores fall into very good category which suggested that the media can be used in a larger scale. Keywords: Organic Chemistry 1, Learning Media, Android Share Link | Plain Format | Corresponding Author (Dewi Handayani)

37	Chemistry Education	ABS-101
APPLICATION OF BRAIN-BASED TEACHING APPROACH TO ENHANCING STUDENT LEARNING ACHIEVEMENT OF CHEMICAL EQUILIBRIUM Nurhamidah1*, Eduwin Saputra1, Dewi Handayani1, Salastri Rohiyat1, Nadia Amida1 and Ice Dwi Karlisa2 1) Chemistry Education, Faculty of Teacher Training and Education, Bengkulu University 2) Senior High School 5 Bengkulu City Abstract The purpose of this study was to find out the effectiveness of Brain-Based Teaching^s learning approach to student learning achievement of chemical equilibrium subject matter. This research uses the demonstration method with Randomized Control-Group Pretest-Posttest Design. The population of this research is all students of grade XI science program of SMA Negeri 5 Kota Bengkulu semester I of the 2020/2021 school year consisting of 8 classes. The sampling technique used in this study is Cluster Random Sampling, which is taking a random group of samples from the population to be taken as a control class and experimental class. The data collection method used is an objective test method for cognitive aspect learning achievement data. Data analysis techniques used include Normality Test, Homogeneity Test, and Independent sample t-Test. The results showed that the application of Brain-Based Teaching learning approach is effective to improve students^ learning achievement in the subject matter of Chemistry Equilibrium grade XI semester I SMA Negeri 5 Bengkulu semester I school the year 2020/2021 from cognitive aspects. Based on the results of the independent sample t-test obtained significance value (2-tailed) of 0.000 < 0.05, it can be concluded that there is a difference in average student learning outcomes between the experimental class and the application of brain-based teaching approach with control class. Where the experimental class that applies the brain-based-teaching approach has an average post-test score of 85.36 higher than the control class of 76.22. Keywords: Education, Brain-based learning, Learning outcomes, Chemical equilibrium Share Link | Plain Format | Corresponding Author (Nadia Amida)

38	Chemistry Education	ABS-102
EXPERIMENT OF ANALYSIS PROTEIN FOR ENHANCING STUDENTS SCIENCE PROCESS SKILLS USING LOCAL MATERIAL BASED ON MODULE DIGITAL Nadia Amida (a*), Hermansyah Amir (a) (a)Chemistry Education, Faculty of Teacher Training and Education, Bengkulu University nadia.amida[at]unib.ac.id Abstract Education era 4.0 demands innovation in the use of technology so that learning can be widely accessed. One way is by using a digital module. Biochemistry is a compulsory subject which includes a practicum that can train students^ skills but so far it has been presented in the form of a cookbook. This study aims to improve students^ science process skills in the qualitative analysis of protein practicum using digital modules based on local materials. The digital module was developed using the 3D Page Flip Professional application. The research method is a quasi-experimental design with ^pretest-posttest non-equivalent control group design^. This research was conducted at Bengkulu University involving students of the chemical education study program, which consisted of 24 people in the experimental class and 24 people in the control class. The instrument used in the form of 7 items of description, student worksheets and observation sheets. The results of the study stated that the use of digital modules based on local materials could significantly improve students^ science process skills between the experimental class and the control class. Six indicators of science process skills are classified as high (classifying, predicting, observing, hypothesizing, planning experiments, and communicating) with N<gain> values &#8203-&#8203-of 0.82- 0.79- 0.92- 0.80- 0.78- and 0.90). Two indicators of science process skills are in the medium category, namely interpreting and applying concepts with N<gain> 0.58 and 0.59 values. Keywords: science process skills, experiment, analysis of protein, local material, module digital Share Link | Plain Format | Corresponding Author (Nadia Amida)

39	Chemistry Education	ABS-118
Peer reflection for students as an affective assessment instrument in chemistry learning Salastri Rohiat (a*), Rina Elvia (a), Rohiat (b) a) Chemistry Education, Faculty of Teacher Training and Education, Bengkulu University *salastri[at]unib.ac.id b) Rohiat Education Foundation, Bengkulu Abstract Teacher skills determine quality of learning process. Chemistry learning has quite complex characteristics. Teachers need to hone skills in supporting achievement of students^ cognitive, affective and psychomotor aspects. Chemistry teachers tend to find it difficult to assess students^ affective aspects. Purpose of research is to describe affective instrument model that can be used by teachers in learning chemistry. Data obtained from interviews and analysis of affective assessment instruments made by teachers. Research subjects were 20 chemistry teachers. Results showed that electronic form-based peer reflection model is one of effective instruments used in assessing affective aspects of chemistry learning. Keywords: student, assessment, affective, chemistry, learning Share Link | Plain Format | Corresponding Author (Salastri Rohiat)

40	Chemistry Education	ABS-119
THE DEVELOPMENT OF GUIDED DISCOVERY LEARNING-BASED E-MODUL ON BUFFER SOLUTION SUBJECT Elvinawati1, Rima Mayesmi Harahap2, Nurhamidah3 Program Studi Pendidikan Kimia FKIP Universitas Bengkulu Abstract This research on making a Guided Discovery Learning (GDL) based chemistry E-module aims to help students understand the buffer solution material more easily and is oriented towards creating meaningful learning. E-module creation using the ADDIE development model. The research was conducted at SMA Negeri 4 Bengkulu City with a research sample of 12 students of class XII MIPA 4 for small-scale trials. The research data were obtained from interviews, material and media validation questionnaires and student response questionnaires. From the research results obtained (1) the feasibility level of the E-module on the material aspect was 93.11% while from the media aspect it was 88.33% so that based on the results of the validation by the E-module validator it was declared very valid, (2) the percentage of E-module achievement increating meaningful learning was 90% with very valid criteria, (3) the percentage of conformity of the E-module component with the cognitive level of Bloom^s taxonomy was 100% with high criteria. and (4) student response to the E-module was 84,16% with very interesting criteris, so it was known that the E-module that has been made interesting and feasible to use because it can make it easier for students to understand learning materials and can create meaningful learning. Keywords: E-module, Guided Discovery Learning, Buffer Solution, ADDIE. Share Link | Plain Format | Corresponding Author (Nadia Amida)

41	Mathematics	ABS-35
Some Factors affecting First Year Student Academic Achievement at SMA Negeri 03 Seluma Bengkulu Ani Gustia Dewi, Sigit Nugroho, Dian Agustina Program Studi Statistika, FMIPA Universitas Bengkulu Abstract This study aims to determine what factors affect the academic achievement of class X students of SMA Negeri 03 Seluma and the dominant variables in each of the factors that influence it. Variables suspected of influencing academic achievement consist of health, intelligence, interest in learning, learning motivation, learning methods, family environment, learning facilities, teachers, and community environment. The method to identify these factors is factor analysis. Factor analysis is a statistical method to analyze a number of variables in terms of their intercorrelation. Based on the results of the study, of the 10 variables used, 2 factors were formed that affect student academic achievement where each factor has an eigenvalue > 1. Factor 1 is Internal Students with an eigenvalue of 4.651 and a variance of 46.508. Factor 2 is Student Environment with eigenvalues and variance of 1.016of 10.162. The dominant variable in each successive factor is interest in learning with variable weights 0.804 and communities with variable weights 0.802. Keywords: Factor analysis, academic achievement, students^ internal, students^ environtment Share Link | Plain Format | Corresponding Author (Ani Gustia Dewi)

42	Mathematics	ABS-83
Prediction Farmer Exchange Rate: Comparative Method of Analysis Holt-Winters Eksponential Smooting and Seasonal ARIMA Harizahayu (a*), Amin Harahap (b), Muhammad Fathoni (b), Hari Sumardi (b) (a*)Politeknik Negeri Medan Jl. Almamater NO.1 Kampus USU Medan *harizahayu[at]polmed.ac.id (b)Universitas Labuhan Batu rectorat[at]ulb.ac.id (b)Politeknik Unggula LP3M JL. Iskanda Muda NO.3 ABCDF, Medan fathoni[at]lp3m.ac.id (b)Universitas Bengkulu Abstract This study aimed to predict seasonal time series data using the Holt-Winters exponential smoothing additive model and Seasonal autoregressive integrated moving average (ARIMA). The data used in this study is data on farmer term of trade at Nort Sumatera in 2016-2020, the source of the data obtained from thes Social website of the Central Statistics Agency. The results showed that the comparing of the Holt-Winters exponential smoothing method and SARIMA on farmer term of trade from 2016 to 2020 contained trend patterns and seasonal patterns by firrst determining the initial values and smoothing parameters minimize forecasting errors and get forecasthing from the best model. The best model to prec farmer term of trade is SARIMA (2,1,1) (0,1,1)_12 because The model fits the observed data well and shows no residual autocorrelation. The results of forecasting farmer term of trade at Nort Sumatera in 2016-2020 have increased continuously every month. Keywords: Holt-Winters eksponential smoothing, SARIMA, Error, Best model, Forecasting Share Link | Plain Format | Corresponding Author (Harizahayu Harizahayu)

43	Mathematics	ABS-106
Graceful and &#961- &#770- labeling on the maximum A-star graph H Sumardi (a*), A Susanta (a), Z Amri (b), Harizahayu (c) a) Program Studi Magister Pendidikan Matematika, Universitas Bengkulu, Jl. W. R. Supratman, Kandang Limun, Muara Bangka Hulu, Bengkulu 38371, Indonesia b) Program Studi Magister Pendidikan Matematika, PPs Universitas Muhammadiyah Sumatera Utara, Jl. Denai No. 217, Kota Medan 20226, Indonesia c) Politeknik Negeri Medan, Jl. Almamater NO.1 Kampus USU Medan Abstract A graph \(G(V,E)\) is called graceful graph if there is an injective mapping \(f\) from \(V(G)\) to \(\{0,1,...,|E|\}\) and bijective mapping \(f^\) from \(E(G)\) to \(\{1,2,...,|E|\}\) such that for each \(uv\in E(G)\) which \(u,v\in V(G)\), \(f^(uv)=|f(u)-f(v)|\), along with a modification graceful graph, namely \(\hat{\rho}\) labeling. The maximum A-star graph is formed of the alphabet A for which each vertex is assigned a star graph \((S_n)\). This paper purpose is to construct the formula of graceful and \(\hat{\rho}\) labeling on the maximum A-star graph. Keywords: Graceful labeling- &#961- &#770- labeling- The maximum A-star graph Share Link | Plain Format | Corresponding Author (Hari Sumardi)

44	Mathematics	ABS-109
Handling imbalanced dataset using ensemble methods on poverty datasets in Bengkulu Province Winalia Agwil, Dian Agustina, Herlin Fransiska, Nurul Hidayati Program Studi Statistika, FMIPA Universitas Bengkulu Abstract Poverty is a global issue that concerns the entire world. This is evident in the SDGs statement, which places poverty at the top of the priority list. Poverty reduction will aid in the resolution of other global issues such as hunger, health, prosperity, education, clean water, and sanitation. Of course, an investigation of the characteristics of impoverished households is required to fulfill the goal of dealing with poverty promptly and effectively. So that, a specific program may be developed based on the characteristics of low-income households. A classification tree, such as the Classification and Regression Tree (CART), is one of the statistical methods that can be used. However, this method has a weak classifier if there is an imbalanced dataset- in this case, the rate of poor households compared to the rate of non-poor households is unequal. Because of the skewed dataset, the minority class will have poorer accuracy. To solve this problem, we^ll need a method called the ensemble technique. There are numerous ensemble methods that can be employed, including the boosting algorithm and the random forest algorithm (RF). The top classifier was chosen based on its sensitivity value. The results revealed that the ensemble technique outperforms the CART method in terms of accuracy. Keywords: Proverty, Classification, CART, Ensemble, Accuracy Share Link | Plain Format | Corresponding Author (Winalia Agwil)

45	Mathematics Education	ABS-2
THE EFFECT OF BLENDED LEARNING MODEL WITH REALISTIC MATHEMATICS EDUCATION (RME) APPROACH ON CONCEPT UNDERSTANDING AND MATHEMATICS PROBLEM SOLVING ABILITY OF STUDENTS OF JUNIOR HIGH SCHOOL 11 BENGKULU CITY Yetti Widiarti, Hanifah, Saleh Haji UNIVERSITAS BENGKULU Abstract This study aims to determine the effect of the learning model Blended Learning with the Realistic Mathematics Education (RME) approach on students^ conceptual understanding and problem solving abilities. This type of research is an experimental study with a quasi-experimental design which was carried out at SMPN 11 Bengkulu City in the even semester of the 2020/2021 school year with the research population being all students of class VIII totaling 248 students and the research sample totaling 60 students consisting of 2 classes namely class VIII.E as the experimental class and VIII.F as the control class. The instrument of this research is a test of concept understanding and a test of problem solving ability. Based on the Mancova statistical test, the results showed that there was an effect of thelearning model Blended Learning with the Realistic Mathematics Education (RME) approach on understanding mathematical concepts and mathematical problem solving abilities together by controlling students^ initial abilities. Keywords: Blended Learning, Realistic Mathematicss Education (RME) Approach, Conceptual Understanding, Problem Solving Abilities Share Link | Plain Format | Corresponding Author (Yetti Widiarti)

46	Mathematics Education	ABS-3
ETHNOMATIC EXPLORATION IN DANCE SILAMPARI KAYANGAN TINGGI Siti Aisyah, Hari Sumardi, Hanifah. UNIB Abstract Ethnomathematics is used to express the relationship between culture and mathematics. Ethnomathematics is formed from habits that are often carried out and then mixed with local environmental traditions in the form of mathematical practices. Like the dance of South Sumatra, namely the Silampari kayangan tinggi dance. The creator of the Silampari Kayangan Tinggi dance did not realize that he had applied mathematical activities and mathematical concepts as the basis for the formation of the beauty of the dance. This study aims to determine the ethnomathematical activities and mathematical concepts that exist in the dance movement of Silampari Kayangan Tinggi. The type of research used in this study is qualitative research with an ethnographic approach. The data obtained in this study were interviews. Observation, and documentation. The data validity technique used in this research is method triangulation and source triangulation. The results of this study indicate that in every dance movement of Silampari Kayangan Tinggi applies counting activities by adjusting the beat and in dance movements Silampari Kayangan Tinggi applies measuring activities when changing places to adjust the next floor pattern change. The concept of one-dimensional geometry, two-dimensional geometry, and reflection geomatri transformation. The conclusion of this study is that in the Silampari Kayangan Tinggi dance moves there are mathematical activities and mathematical concepts. Keywords: Tari Silampari Kayangan Tinggi, Etnomatematika Share Link | Plain Format | Corresponding Author (Siti Aisyah)

47	Mathematics Education	ABS-4
The Effect of Learning Motivation on Students Mathematical Communication Ability Dessy Anggreni, Zamzaili, Saleh Haji Universitas Bengkulu Abstract This study aims to determine whether there is an effect of student learning motivation on students^ mathematical communication skills at SMPN 16 Bengkulu City. This type of research is an ex-post facto research conducted at SMPN 16 Bengkulu City in the even semester of the 2020/2021 academic year with the research population being all students of class VIII totaling 224 students and the research sample totaling 64 students consisting of 2 classes, namely class VIII .A and class VIII.C . The results showed that there was an influence of students^ learning motivation on students^ mathematical communication skills. Learning motivation had a direct effect on mathematical communication skills, indicated by the path coefficient of &#12310-&#12310-&#961-yx&#12311-_ X_ =0,338 with a value of [t_count=2.758] > [t_table=1.998] at &#945- significant level. =0.05. The contribution of the influence is 11.42%. This shows that the higher the learning motivation of students, the higher the mathematical communication skills of students. Keywords: student learning motivation ,students^ mathematical communication skills Share Link | Plain Format | Corresponding Author (DESSY ANGGRENI)

48	Mathematics Education	ABS-5
The Effect of Habits of Mind on Mathematical Reasoning Ability of Undergraduate Mathematics Education Students in Bengkulu City during the Covid-19 Pandemic Inda Hudiria(*), Saleh Haji, Zamzaili Mathematics Education Program, Bengkulu University Jl. W.R. Supratman, Kota Bengkulu, Indonesia *indaria53[at]gmail.com Abstract This research aimed to determine the effect of habits of mind on students^ mathematical reasoning abilities. This research used an ex-post facto quantitative approach. The population in this research were Mathematics Education students in Bengkulu City who were taking Mathematics Statistics courses. Sampling is done by census method, which was taking all the population as research samples. The sample in this research amounted to 83 respondents. The research instrument consisted of a habits of mind questionnaire and a mathematical reasoning ability test. This research was conducted online during the COVID-19 pandemic. The data were tested for analytical requirements first, namely descriptive statistical tests, normality tests and linearity tests. Furthermore, the data were analyzed using regression analysis techniques using SPSS. With a significance level of 5%, the results showed that there was a significant direct effect between habits of mind on mathematical reasoning abilities of 0,813. The impact of habits of mind on mathematical reasoning ability was 66,2%, while 33,8% was the impact of other variables not examined in this research. So, it can be concluded that there was an impact of habits of mind on the mathematical reasoning ability of Mathematics Education students in Bengkulu City during the COVID-19 pandemic. Keywords: Covid-19 pandemic- Habits of mind- Mathematical reasoning ability- Online learning Share Link | Plain Format | Corresponding Author (Inda Hudiria)

49	Mathematics Education	ABS-6
The Effect of Zoom-assisted Problem Posing Model on The Mathematical Representation Ability for Junior High School Students Nadya Sospolita, Hari Sumardi, Haji Saleh Universitas Bengkulu Abstract The research aims to analyze the effect of the zoom-assisted problem posing learning model on the mathematical representation ability for junior high school students. This research is an experimental study with a pretest-posttest design. The population on this research are all of the students of SMPN 16 Bengkulu City. The sampling technique was group randomization with selected samples of class VII.F and class VII.E, and stand for 32 students everyclass. Data collection techniques and research instruments were tests in the form of mathematical representation ability questions in the form of descriptions. The data analysis was using ancova test. The results of the study found that there was an effect of the zoom-assisted problem posing learning model on the students mathematical representation abilities. The results also show that the achievement of students mathematical representation with problem posing learning was better than conventional learning models Keywords: Problem Posing, Representation Mathematics, Communication Mathematich Share Link | Plain Format | Corresponding Author (nadya sospolita)

50	Mathematics Education	ABS-7
Pengaruh Kemadirian Belajar Terhadap Kemampuan Pemecahan Masalah Matematika pada Masa Pandemi Covid-19 di SMA Kota Bengkulu Rizka Furqany, Hari Sumardi, Saleh Haji Universitas Bengkulu Abstract This study aims to determine the effect of learning independence on mathematical problem solving abilities during the covid-19 pandemic at Bengkulu City Public High School. The method used in this study is a correlational quantitative method using path analysis which aims to analyze the pattern of the relationship between learning independence variables and mathematical problem solving abilities during the covid-19 pandemic and if there is how big the relationship between the two is. The population in this study were in three high school schools in Bengkulu City with a sample of 115 students of class X. The instruments used in this study consisted of 40 statements on the learning independence questionnaire and 2 questions on the student^s mathematical problem solving ability test. Data collection is done online with the help of google form. Based on the results obtained, there is a positive and significant relationship between learning independence and mathematical problem solving abilities during the covid19 pandemic 31,8% with a significant level of 5%. Keywords: learning independence, mathematical problem solving ability, covid 19 pandemic Share Link | Plain Format | Corresponding Author (Rizka Furqany)

51	Mathematics Education	ABS-8
Effect of Concept Attainment Model Toward Mathematical Generalization Ability and Van Hiele^s Geometry Thinking Ability Desfa Lusiana, Zamzaili, Hari Sumardi Mathematics Education Study Program, Bengkulu University Jl. WR. Supratman Kandang Limun, Bengkulu 38371 A, Indonesia E-mail: dflusiana89[at]gmail.com Abstract This study intends to know the effect of Concept Attainment Model towards the students in the mathematical generalization ability and the Van Hiele^s geometry thinking ability. This study uses quasi experimental method. The population includes all student of SMP Negeri 16 Bengkulu, in the academic year 2020/2021. The sample consists of two classes selected using purposive sampling techniques. Mathematical generalization ability and Van Hiele^s geometry thinking ability is measured by a test that has been valid and reliable. Furthermore, the data obtained is analyzed using MANCOVA test with 5% significant level (&#945- = 0,05). The result of the hypothesis test indicates that there is a positive effect of Concept Attainment Model into mathematical generalization ability and Van Hiele^s geometry thinking ability. Keywords: concept attainment, mathematical generalization, Van Hiele^s geometry thinking Share Link | Plain Format | Corresponding Author (Desfa Lusiana)

52	Mathematics Education	ABS-10
The Development of Higher Order Thinking Mathematics Problems for High School in Bengkulu Context Agus Susanta (a*), Edi Susanto (b) a) Postgraduate Program in Mathematics Education Study Program, University of Bengkulu, Jl. WR Supratman, Bengkulu City 38122, Indonesia *agussusanta[at]unib.ac.id b) Undergraduate in Mathematics Education Study Program, University of Bengkulu, Jl. WR Supratman, Bengkulu City 38122, Indonesia Abstract One of the problems that often occurs in learning mathematics in schools was the difficulty of teachers in providing test instruments. The purpose of this study was to develop in higher order thinking mathematical problems for high school students in Bengkulu context. The higher order thinking level that focused on in this study were C4 (analysis), and C5 (synthesis) which were related to the Bengkulu context. The type of research used was research and development. The research instrument consisted of validity and practicality sheets. The validity of the questions was analyzed using the Aiken index based on three aspects, namely content, construct, and language. The practicality test was carried out in a small group trial with a pilot school at Senior High School 3 Bengkulu City. The results of the study was in the form of higfer oder thinking mathematics problem for high school for tenth grade in Bengkulu context as many as 10 short answer questions and 5 esay questions, C4 level was 5 questions (33.33%) and C5 was 4 questions (26.67%). The results of the trial on 24 students showed that the mastery of each level was the level of level of C4 (analyzing) of 31.09% and level of C5 (analysis) of 24.31%. Keywords: Development, Problems, HOTS, High School Share Link | Plain Format | Corresponding Author (AGUS SUSANTA)

53	Mathematics Education	ABS-13
Achieving the Triangle Principle of Junior High School Students Through Youtube-Assisted Learning During the COVID-19 Pandemic Nirwana, Wahyu Widada Mathematics Education Postgraduate Program, Bengkulu University Abstract The purpose of this study is to describe the Achievement of the Triangle Principle of Middle School Students Through Youtube Assisted Learning During the COVID-19 Pandemic. Based on the formulation of the research problem, the type of this research is exploratory research. This qualitative research is a procedure to reveal the Achievement of the Triangle Principle of Junior High School Students Through Youtube Assisted Learning During the COVID-19 Pandemic. The main instrument in this study was the researcher himself and was guided by other instruments in the form of a task sheet about mathematics problems based on local culture, as well as interview guidelines. In addition, other research instruments are: anecdotal sheets about notes on findings and observations of data sources. Each stage of subject selection is directly carried out by the data collection process through task-based interviews, and immediately followed by data analysis (in the form of genetic decomposition analysis). Based on data analysis, it is known that the Achievement of the Triangle Principle of Middle School Students Through Youtube Assisted Learning During the COVID-19 Pandemic. The conclusion of this research is that the process of achieving the triangular principle of junior high school students through YouTube-assisted learning during the COVID-19 pandemic is carried out through enactive, iconic and symbolic steps. Students are able to make a conjecture about the large number of angles in a triangle on a plane that is 180 degrees. Alternative learning syntax about triangles for junior high school students during the COVID-19 pandemic: Clarification of problems (Students have entered online classes via google meet for about 20 minutes)- Students learn to understand the material through youtube video shows. (30 minutes)- Information and data collection (Connection and Representation) (10 minutes)- Information and data sharing (20 minutes)- Conclusion (10 minutes, via Zoom Meeting)- Evaluat Keywords: Achievement of the triangle principle, Youtube Media Share Link | Plain Format | Corresponding Author (Nirwana Nirwana)

54	Mathematics Education	ABS-17
Analysis of students problem solving ability in solving improper integral problems Hanifah FKIP UNIB Abstract This study aimed to determine the students problem solving ability using Polya stages in solving Improper Integral questions in online Integral Calculus Learning through zoom applying Student Centered Learning. The research method used in this study was ex post facto research. The research subjects were 14 students from class B in the 3rd semester of Mathematics Study Program FKIP UNIB AY 2020/2021 getting grade A and A- in Integral Calculus Learning. The test was conducted online via email on January 20, 2021. The analysis in Polya stages consisted of: P1) Understanding the Problem- P2) Making a Plan- P3) Carrying out the Plan- and P4) Looking Back. The instruments used to collect datas were improper integral test sheets, analysis guide sheets, and open questionnaires. The result showed the mean score of the students problem solving ability was 74.02. The mean value in each stage: P1) = 79.91- P2) = 79.46- P3) = 72.77- and P4) = 65.18. It was concluded that students already had very good abilities in understanding problems and planning solutions. Keywords: Improper Integral, Problem Solving Ability with Polya Stages Share Link | Plain Format | Corresponding Author (Hanifah Hanifah)

55	Mathematics Education	ABS-32
Influence of Anxiety and Perception on Learning Mathematics on Understanding Concepts Students Of Class VIII SMP N 16 In Bengkulu City Noke Hanif Afriani, Zamzaili, and Hanifah University of Bengkulu Abstract Influence of Anxiety and Perception on Learning Mathematics on Understanding Concepts Students Of Class VIII SMP N 16 In Bengkulu City N H Afriani1*, Zamzaili2, and Hanifah3 1,2,3 Faculty of Mathematics Education, University of Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia *nokehanif@gmail.com, zamzaili@unib.ac.id2, hanifah@unib.ac.id3 Abstract. This study aims to determine the relationship and influence of anxiety and perception on learning mathematics on understanding concepts. The research used is ex post facto and analyzed using path analysis. The instrument used an anxiety questionnaire, a perception questionnaire on learning mathematics, and understanding concepts. The population in this study was class VIII SMP Negeri 16 Bengkulu City for the Academic Year 2020/2021, with a research sample of 64 people, namely class VIII.D totaling 32 people and class VIII.E totaling 32 people. The results showed that anxiety affects understanding of concepts, perceptions of learning mathematics also affect understanding of concepts. Hypothesis analysis shows that there is a significant and significant relationship between the instruments. Keywords: 171 Share Link | Plain Format | Corresponding Author (Noke Hanif Afriani)

56	Mathematics Education	ABS-36
Direct and Indirect Effects of Self Confidence, Self Regulation Learning, Formative Evaluation on Understanding Geometry Concepts for Bengkulu City Junior High School Students Zamzaili* and B Swita** *FKIP Universitas Bengkulu **FMIPA Universitas Bengkulu Abstract The purpose of this study is to explain the direct and indirect effect of self-confidence, self-regulation learning, formative evaluation on understanding the concept of geometry. The sampling technique used is simple random sampling with a sample of 96 students. The research instrument is a test of the ability to understand geometric concepts, formative tests, self-confidence and self-regulation learning questionnaires. The instrument validation was analyzed using the aiken and hoyt formulas. The data analysis technique uses path analysis. The results obtained (1) there is a significant direct or indirect effect of self confidence on understanding the concept with the path coefficient. 0.196 and 0.229. (2) there is a significant direct or indirect effect of self-regulation learning on concept understanding with path coefficients. 0.335 and 0.074. (3) there is a significant direct effect of formative evaluation on concept understanding with a path coefficient of 0.219. It is concluded that self-confidence can improve students^ conceptual understanding by considering independent learning and formative assessment results. Keywords: Self Confidence, Self Regulation Learning, Formative Evaluation Share Link | Plain Format | Corresponding Author (Zamzaili Zamzaili)

57	Mathematics Education	ABS-38
SCAFFOLDING APPROPRIATION FOR STUDENTS^ METACOGNITIVE FAILURE IN MATHEMATICAL PROBLEMS SOLVING Nizlel Huda , Jefri Marzal Jambi University Abstract This article aims to determine the appropriate scaffolding for students^ metacognitive failure in solving math problems. Metacognitive failures that occur in students^ metacognitive activities are metacognitive blindness, metacognitive vandalism, and metacognitive mirage. There are 3 levels of scaffolding that can be given to students^ metacognitive failures in solving mathematical problems: (1) Environmental Provisions, (2) Explaining, Reviewing and Restructuring and (3) Developing Conceptual Thinking. This research is qualitative research with case study approach. The students who were taken as prospective research subjects were grouped into two groups. The first group is students who solve problems with Horner^s Rules while the second group is students make the imagery approaches. The findings indicate that students who solve problems using Horner^s Rules experience metacognitive blindness and metacognitive mirage. This metacognitive failure occurs in metacognitive regulation activities by providing scaffolding level 2 (explaining, reviewing, and restructuring). Meanwhile, the group that makes imagery approaches experienced metacognitive vandalism. This metacognitive failure occurs in the activities of metacognitive regulation and metacognitive blindness by providing scaffolding level 3 as developing conceptual thinking. Keywords: metacognitive failure, mathematical problem solving, scaffolding Share Link | Plain Format | Corresponding Author (Nizlel Huda)

58	Mathematics Education	ABS-40
Validation and reliability of strategy instrument test the firing line with process oriented guided inquiry learning modified (POGIL) on problem solving abilities and mathematical representation of junior high school students Ayu Sekarsari Suharno1, Agus Susanta2*, and Hanifah22 1Student on the Mathematics Education Graduate Program, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 381371, Indonesia 2Lecturer in the Mathematics Education Graduate Program, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 381371, Indonesia Abstract The purpose of this study was to find out the validation and reliability of strategy instrument test The Firing Line with Process Oriented Guided Inquiry Learning (POGIL) Modified on the solving ability of junior high school students. The subjects of this study were 4 experts. The instruments used are RPP, LKPD, about problem solving abilities and mathematical representations. The results of the expert test using the Aiken^s Validation formula concluded that RPP 0.922, LKPD 0.924, problem solving questions 0.893, mathematical representation questions 0.896, while reliability using Anava Hoyt showed RPP 0.710, LKPD 0.730, problem solving questions 0.720, and mathematical representation instruments 0.752 with reliable interpretation tall. This shows that the results of the expert^s assessment of the RPP, LKPD, problem solving and representation instruments are feasible to use. Keywords: strategi the firing line dengan process oriented guided inquiry learning (POGIL), problem solving, mathematical representation Share Link | Plain Format | Corresponding Author (Ayu Sekarsari Suharno)

59	Mathematics Education	ABS-44
Analysis of Cognitive Levels of Competency Tests in Mathematics Textbook Published by Erlangga Grade VIII on First Semester Based on Revised Bloom Taxonomy Imelda Verina, Hanifah, Nur Aliyyah Irsal Program Studi Pendidikan Matematika, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38371 A, Indonesia Abstract This research aimed to describe the distribution of cognitive levels on competency tests in mathematics textbook published by erlangga grade VIII on first semester chapter of relation and function and also systems of linear equations in two variables based on revised bloom taxonomy. This type of research was descriptive research that analyze to describe Taxonomy Bloom levels on cognitive process dimension. Competency tests chapter of relation and function had 33 questions and competency tests chapter systems of linear equations in two variables had 30 questions. The competency tests chapter of relation and fuction had cognitive levels of understanding (C2) as many as 12 questions (36,36%), applying (C3) as many as 15 questions (45,46%), and analyzing (C4) as many as 6 questions (18,18%), and there was no cognitive levels of remembering (C1), evaluating (C5), and creating (C6). While the the competency tests chapter system of linear equations in two variables had cognitive levels of understanding (C2) as many as 1 question (3,33%), applying (C3) as many as 22 questions (73,33%), analyzing (C4) as many as 5 questions (16,67%), and evaluating (C5) as many as 2 questions (6,67%), and there was no cognitive levels of remembering (C1) and creating (C6). Keywords: Competency Tests, Mathematics Textbook, Cognitive Level, Bloom Taxonomy Share Link | Plain Format | Corresponding Author (Imelda Verina)

60	Mathematics Education	ABS-45
Analysis of students problem solving ability in solving the volume of a solid of revolution Ahbi Mahdianing Rum (a*), H Hanifah (b) a) Alumni Program Studi Pendidikan Matematika, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia *ahbimahdia[at]gmail.com b) Program Studi Pendidikan Matematika, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia Abstract This study aimed to determine the students problem solving ability in solving the volume of a solid of revolution questions in online Integral Calculus Learning through zoom implementing Student Centered Learning. The research method used in this study was descriptive qualitative method. The subjects were 32 students from class B in the 3rd semester of Mathematics Study Program FKIP UNIB Academic Year 2020/2021. The test was conducted online via Google Classroom on 8th September, 2020. The analysis in Polya stages consisted of: P1) Understanding the Problem- P2) Making a Plan- P3) Carrying out the Plan- and P4) Looking Back. The instruments used to collect datas were midterm test sheets including volume of a solid of revolution questions. The result showed the average score of the students problem solving ability was 1.54 out of 2. The mean value in each stage: P1) = 1.68- P2) = 1.63- P3) = 1.43- and P4) = 1.44. It was concluded that students had good abilities in understanding the problem and planning the solution but they still had difficulties in drawing graphs and calculating the volume. Keywords: Polya Stages, Problem Solving Ability, Volume of a solid of revolution Share Link | Plain Format | Corresponding Author (Ahbi Mahdianing Rum)

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