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Rudy Setiawan, Elita Mega Selvia Wijaya, Maria Tanggu Todhu
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 209-220; https://doi.org/10.33541/edumatsains.v7i1.3971

Abstract:
This study aims to improve student learning outcomes based on Student Worksheets using the Realistic Mathematics Education approach. Realistic Mathematics Education is a learning concept that presents a material in the form of problems that must be solved by students based on understanding the concepts of everyday student life. This research is a research development or Research and Development (R&D) adapted from the ADDIE development model, with 5 stages of development, namely: 1) Analysis (analysis); 2) Design (design); 3) Development (development); 4) Implementation (implementation); and 5) Evaluation. Based on the analysis of the assessment data from the questionnaire results of teaching materials filled out by students of SMPN 16 Malang class VIIIA, the results showed that the teaching materials developed were in the very good category with an average score of 87%. This shows that the teaching materials developed are very valid.
Melinda Rismawati, Marli Hidayat, Anggista Septiani Saputri, Rupinus Isa
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 131-138; https://doi.org/10.33541/edumatsains.v7i1.3930

Abstract:
The research results obtained are variations in the contribution of urea used as fillers is 15%. Based on this research, it can be said that diaper waste has the potential to control the release of urea. Furthermore, it can explain the rate of release of urea in chili plants. The purpose of this research is to develop comic-based teaching materials in algebraic forms to improve students' literacy skills. this research method is research and development (Research and Development). In developing teaching materials, researchers use 6 stages, namely (1) analyzing the product to be developed, (2) making comic scripts, (3) developing initial products, (4) expert validation and revision, (5) field trials and product revisions, and (6) manufacture of the final product. The subjects of this study consisted of expert validators, teachers and students of class X IPS 1 SMAN 1 Sintang which consisted of 20 people. The instruments used are validation, questionnaires, and questions. Based on the research, the results of the media and material validation have very feasible interpretation criteria of 86.36%, the teacher's response results have an interesting interpretation criterion of 75%, the results of the student response questionnaire have an interesting interpretation criterion of 79.75%. The conclusion of this research is; Mathematical literacy ability of students of class X IPS 1 SMAN 1 Sintang is high with an average value of 71.08%. Comics teaching materials can improve the mathematical literacy skills of high school students.
Nurul Kurnia, Subhan Ajiz Awalludin
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 153-166; https://doi.org/10.33541/edumatsains.v7i1.3934

Abstract:
The purpose of this study is to develop multimodal-based mathematics teaching materials on row and series materials using assistance media in the form of Power Point, iSpring Suite 10 and Website 2 apk builder. The method used in this study is the Waterfall model. A tool used to analyze compilers using Unified Modeling Language (UML). The result of this research is an android application from the development of mathematics teaching materials on multimodal-based lineups and series materials. Multimodal is a way of learning by combining several techniques, be it sound, visual and also writing. Testing this application uses a black box test, which is testing an application, which can be tested on anyone and the android media used in this test is the Samsung Galaxy A51. Based on the test results, all the buttons in the application work as intended. Then it can be concluded that the application of mathematics to the material of rows and series can be used to train students' mathematical reasoning skills, especially in row and series materials. For this application, it is hoped that it can be developed again in various ways, be it animation, design, features, practice questions, various and more varied quiz questions and more effective programming so that it becomes more interesting.
Nurfika Ramdani, Mariaulfa Mustam, Hijrah Amaliah Azis
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 1-10; https://doi.org/10.33541/edumatsains.v7i1.3454

Abstract:
The problem of disposable diaper waste is a serious problem that challenges the environment. Therefore, the researchers sought the utilization of diaper waste in agriculture. Efficiency of fertilizer absorption in plants in the environment by 30-40%, remaining in the air and evaporating into ammonia gas. Utilization of baby diaper waste as a matrix and urea as a filler was carried out in this study. This is expected to be able to control the release of nitrogen in fertilizers in accordance with the amount and amount needed by plants (desorption) and maintain nitrogen requirements in the soil, so that the amount of fertilizer given is more efficient than conventional methods. How the purpose of this research is how to make fertilizer based on diaper waste, determine Nitrogen adsorption capacity into the matrix and determine the fertilizer requirements for growing chilli seedlings. The study was divided into 5 stages, the processing of baby diaper waste; second, the manufacture of urea larvae (fillers); three, filling the filler into the matrix; Rate, determine the Nitrogen adsorption capacity into the matrix; discuss, test on plants. The research results obtained are variations in the contribution of urea used as fillers is 15%. Based on this research, it can be said that diaper waste has the potential to control the release of urea. Furthermore, it can explain the rate of release of urea in chili plants.
Imelda Agustin Rostiana, Indrie Noor Aini
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 139-152; https://doi.org/10.33541/edumatsains.v7i1.3956

Abstract:
This research is to describe the mathematical understanding ability of high school students on exponential material based on the achievement of each indicator of mathematical understanding. This type of research is a qualitative descriptive research. The subjects in this study were high school students Class X for the academic year 2021/2022 in the Karawang area which consisted of 3 students. The research sample was obtained through a purposive sampling technique, namely taking samples with certain considerations. The data collection technique used a test instrument which consisted of 3 description questions. Data were analyzed descriptively. The data analysis technique used is qualitative data analysis with data reduction steps, data presentation and conclusion drawing. The results of the analysis of this study indicate that the ability of students to solve exponential problems based on indicators of understanding is quite good. The results showed that on average students were able to understand the problem, students were able to understand the concept of the exponential equation, and students were able to adjust the exponential equation formula to the problem solving. However, there are errors where students have not been able to determine the set of solutions correctly.
Rais Nur Latifah, Nurmilatillah
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 77-90; https://doi.org/10.33541/edumatsains.v7i1.3917

Abstract:
Food is a product that is synonymous with packaging techniques to protect the quality of the food. The packaging technique used edible film. This study aims to make a food protective coating from corn cobs and cherry leaf extract. The research method used the preparation of edible film, functional group analysis with FTIR instrument, mechanical properties analysis, pH testing and antibacterial properties analysis. The results showed that the edible film contains flavonoid compounds with antibacterial activity. The results of the analysis of the identification of functional groups on edible films are the presence of typical absorption of hydroxide groups, C-H groups, carbonyl groups and glycosidic bonds. Analysis of the mechanical properties of edible film for the thickness level is 0.224 mm and the tensile strength is 3.855 N/cm2. Meanwhile, based on pH testing, edible films were at a neutral pH during a 10-day storage period.
Putri Agustina, Adi Ihsan Imami
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 39-50; https://doi.org/10.33541/edumatsains.v7i1.3852

Abstract:
The study was intended to determine the ability to solve the mathematics problems of students in public school 2 kutawaluya using the Polya steps. The methods used in this study are qualitative, describing the ability to solve a student's problem. Data collection techniques conducted in this study include tests, interviews, and documentation. From tests done by students, 3 research samples are divided into high, moderate, and low categories. From these three samples will be interviewed, and then will be picked up documenting during research as evidence that researchers have observed. After data collection, researchers will perform a data analysis with the following step: classifying data, classifying data, disposing of unused data, the presentation of data by compiling what has already been obtained, and the last to draw conclusions in the form of a sentence, which is obtained from the data's menu. Research shows: the student with the high problem-solving capability category is poorly researched in determining formulas, the student in the category is not reexamining the established completion and is also inmeticulous in writing conclusions at one problem, and the student with low valve-problem solving capabilities, is still less able to understand the problem, plan the problem, solve the problem and reexamine it.
Aisyah Rahmayantri, Nanang Priatna
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 197-208; https://doi.org/10.33541/edumatsains.v7i1.3920

Abstract:
The purpose of this research is to describe students’ problem solving ability through mathematics subject. The focus is especially at narrative questions in social arithmetic material on VII grade students. Seeing as the problem solving ability has four indicators such as: 1) the identification of problem, 2) formulating strategy, 3) conducting strategy, and 4) evaluating solution, this description is also considering the type of adiversity quotient (AQ). The research subject involved 28 students on VII grade level of Mts Negeri 8 Majalengka who have studied social arithmetic material. Then, the subjects are classified according to the type of AQ which are Climber, Camper, and Quitter. The data collection technique used is questionnaire, problem solving test, and interview. In analysing the data, the researchers used data reduction, data serving, and drawing conclusion or verification. This research focused on problem solving ability through social arithmetic material that wrapped into narrative questions which closely related to students’ daily activities. The result shows that students with Climber type accomplish all indicators of problem solving ability. However, the Camper type of students reached only three indicators, and students with Quitter type showed only get as far as one indicator draw up.
Adilah Aliyatulmuna, H.W. Wijaya, M. Murti, M. Rafli
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 11-20; https://doi.org/10.33541/edumatsains.v7i1.3760

Abstract:
The application of the enthalpy balance in solving the calorific value calculation has substituted the application of equation of DU = m(C)(DT). The energy balance refers to (accumulation) = (total energy entering the system) - (total energy leaving the system) + (heat entering the system) - (work done by the system) + (work to enter mass into the system) - (work to remove mass of the system), which produces an enthalpy balance of DH1m1 =DH2m2 generating several assumptions. The assumptions include: first, the system is in a steady state condition; second, the system work (W) is quite small; and third, neglect (Dng)RT results in internal energy (DU) of the nickel wire, having a value almost equal to the enthalpy from the oxidation reaction of the nickel wire. The application of the enthalpy balance requires data on the enthalpy of combustion from a standard material, such as benzoic acid. The result of the enthalpy balance is the positive capacity of the bomb calorimeter. In determining the heat of a material, the enthalpy balance equation requires the value of the calorimeter capacity. This experiment examines the calorific value of black cumin in the form of oil, seeds, and a mixture with 20% coconut oil. The test results indicate that black cumin oil has the highest calorific value, which is in accordance with the referred literature reporting that black cumin oil has a high calorific value, while dried black cumin or seeds and palm oil have a similarly low calorific value.
Anna Angela Sitinjak, Toni Tumangger
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 33-38; https://doi.org/10.33541/edumatsains.v7i1.3820

Abstract:
The quality of Crude Palm Oil is known from the level of impurities and oil losses. Many factors cause the quality of CPO is not as expected, one of which is temperature. This study aims to know the relationship between temperature and levels of impurities. The research method used is descriptive corellation research and then look for the correlation coefficient to see the relationship between these two variables. The results showed that at a temperature of 900C - 950C, an impurity contents of 0.22% - 0.37% and r = -0.9584 which means that there is a strong negative relationship, namely the temperature. higher, the lower the level of impurities.
Maduni Ismu Qolbi, Indrie Noor Aini
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 99-112; https://doi.org/10.33541/edumatsains.v7i1.3772

Abstract:
This study aims to describe the mathematical communication skills of high school students in class XI on linear program material. The research method used is descriptive research. The subjects in this study consisted of 5 students of class XI one of the public high schools in Karawang Regency which were determined using purposive sampling technique. The research data collection technique was obtained from a test instrument in the form of 3 validated description questions which contained 3 indicators of mathematical communication ability. The results of this study indicate that the mathematical communication ability of class XI high school students in Karawang Regency in understanding linear programming material is still very low. This can be seen from the average percentage of the three questions of mathematical communication skills is 48.3℅. In indicator 1, students have not been able to express mathematical ideas through writing, demonstrate and visually describe them. For indicator questions 2 students are able to understand, interpret, and evaluate mathematical ideas both in writing and in other visual forms, but there are still some errors. Meanwhile, on indicator questions 3 students have not been able to use terms, notations, mathematical symbols and their structures to present ideas, describe relationships with various situation models.
Alaya Diwimuri, Joko Soebagyo
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 113-130; https://doi.org/10.33541/edumatsains.v7i1.3916

Abstract:
The purpose of this study is to design and build an educational game based on android thinking math using the Kodular web-based tool with block programming language. This educational game is needed as an effort to train one's mathematical reasoning skills, and eliminate boredom and fear for those who want to learn mathematics. The results of five studies related to mathematics educational games, generally stated that mathematics educational games could increase one's interest in learning mathematics which were used effectively and interestingly. The method used is the Waterfall educational game development method. The tool used to analyze the compiler uses the Unified Modeling Language (UML). The result of the study is an Android-based math learning game. Based on the test results, it can be concluded that the implementation of the thinking math educational game to train mathematical reasoning skills was successfully carried out. For this educational game itself, it is hoped that it can be further developed in terms of animation, design, features, music, various quiz questions with more varied subject matter and more effective programming so that it becomes more interesting.
Teni Suriani, Yulia Rahmawati Z
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 221-230; https://doi.org/10.33541/edumatsains.v7i1.3941

Abstract:
This study aims to describe students' mathematical abilities assisted by LKS with the STAD type cooperative learning model through the Hand On Mathematical technique. Researchers used a quantitative approach in the form of Quasi Experiment. The study population was class VIII SMP N 43 Padang and the samples of this study were students of class VIII.1 as the experimental group who received treatment with the STAD type cooperative learning model through hand on mathematics techniques and VIII.2 as the control class who received conventional learning. The research instrument is in the form of a final test to see the understanding of mathematical concepts and problem solving. The results of the analysis show that: 1) The understanding of mathematical concepts taught by the STAD-type cooperative learning model through the hand on mathematics technique with LKS-assisted is better than that taught by conventional learning, 2) The mathematical problem-solving ability taught by the STAD-type cooperative learning model through the STAD-type cooperative learning technique. Hand on mathematics assisted by LKS is better than what is taught with conventional learning in class VIII SMP N 43 Padang.
Melisa Yolanda, Sri Benti Etika, Riga Riga
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 91-98; https://doi.org/10.33541/edumatsains.v7i1.3924

Abstract:
Andrographis paniculata (Sambiloto) was reported to produce secondary metabolites with various biological activities including antibacterial. The antibacterial compounds from sambiloto can also be explored from other sources. One of them is their endophytic fungi. The purpose of this research was to determine the antibacterial activity of endophytic fungi cultivated in red rice media. The steps of this research were isolation, cultivation, extraction, antibacterial test and test the content of secondary metabolites from endophytic fungi derived from the twigs of A. paniculata. An endophytic fungus labelled with RS-1 has been isolated from the twigs of A. paniculata. The results of the antibacterial activity test showed that the ethyl acetate extract of the fungus RS-1 had the ability to inhibit the growth of all tested bacteria at concentrations of 1%, 3%, and 5%. The ethyl acetate extract of the endophytic fungus RS-1 isolated from the A. paniculata has potential to produce antibacterial compound.
Susan Belipati, Thomas Lapenangga, Stormy Vertygo
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 21-32; https://doi.org/10.33541/edumatsains.v7i1.3805

Abstract:
The study was conducted to determine the difference in immersion time in cow urine on the percentage of germination, the average germination rate and the rate of germination growth. This study used a completely randomized design (CRD) with 4 treatments and 4 replications. The treatments were P0: Immersion in cow urine without time, P1: Immersion in cow urine for 30 minutes, P2: Immersion in cow urine for 60 minutes and P3: Immersion in cow urine for 90 minutes. The parameters in this study were the percentage of germination, the average germination rate and the growth rate of germination. Data on percentage germination, mean germination rate and growth rate of germination were analyzed using Analysis of Variance (ANOVA) and for growth rate of germination continued using Duncan's test. The results showed that the immersion time of lamtoro seeds in cow urine had a significant effect (P0.05) on the percentage of germination and growth rate of germination. The best result was given by P3 treatment that gave the highest germination rate of 0.525 seed/day compared to the control which was only 0.428 seed/day. Nonetheless, it is still recommended to use cow urine to immerse seeds for 90 minutes particularly to enhance its germination rate. This research could hopefully give a useful reference for farmers as an alternative method of technology in cultivating animal feed plants for a better and improved productivity.
Nursanti Yuliani, Sophia Grace Sipahelut, Vita Novalin Lawalata
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 51-64; https://doi.org/10.33541/edumatsains.v7i1.3865

Abstract:
Hand sanitizer as a medium to maintain hand hygiene is becoming a trend among the community today, especially because of the COVID-19 pandemic. Hand sanitizers with active ingredients of essential oils are considered safer than alcohol. The purpose of this research was to examine the addition of cajuput oil in the manufacture of aloe vera hand sanitizer on the physical quality, antiseptic and organoleptic activity of the hand sanitizer produced. The research design used a completely randomized design (CRD) with one factor, namely the addition of cajuput oil, with five treatment levels, namely 0 mL, 16 mL, 20 mL, 24 mL, and 28 mL with each treatment in three replications. The hand sanitizer produced was then tested for physical characteristics (density, spreadability, pH, and homogeneity), antiseptic activity, and organoleptic characteristics (color, texture, aroma and non-sticky impression). The results showed that the aloe vera hand sanitizer sample with the addition of 28 mL cajuput oil had a stronger antiseptic effectiveness among other samples and had physical characteristics that met the quality requirements of SNI hand sanitizer including pH 7.33, spreadability 6.96 cm, density 1.1546, homogeneous without any coarse grains and organoleptically acceptable and favored by the panelists.
Luvi Antari, Syaifudin, Nia Pusvitasari
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 183-196; https://doi.org/10.33541/edumatsains.v7i1.3931

Abstract:
This study aims to produce worksheets based on the ICARE approach that are valid and practical and have a potential effect on algebraic arithmetic operations material. This research is a development research or Development Research. The LKPD development process goes through two stages, namely the preliminary stage and the formative evaluation stage. The LKPD was declared valid after being validated by three experts based on: 1. ICARE characteristics, 2. The suitability of the material to basic competencies and indicators of competency achievement, and 3. Grammatical compatibility according to the General Guidelines for Indonesian Spelling (PUEBI). While the practicality of LKPD is seen from the responses of students in small groups in answering questions. The potential effect is seen from the results of students' final ability tests. student learning outcomes obtained an average final grade of 85.35 which means that student learning outcomes are classified as very good. So it can be concluded that the ICARE approach-based worksheets that have been developed have a potential effect on student learning outcomes.
Nella Audina Kusuma Citra, Alfi Laila, Rian Damariswara
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 167-182; https://doi.org/10.33541/edumatsains.v7i1.3958

Abstract:
The background of this research is the observation that 30% of students KKM and 70% KKM, students who are less disciplined in doing and collecting assignments, speak impolitely, do not care about the troubles of their friends. The aims of this study are (1) to determine the validity, practicality and effectiveness of the product development of teaching materials for students with the sub-theme of the beauty of cultural diversity in my country to improve the character of love for the homeland in fourth grade elementary school students in the 2020/2021 academic year? Research and development (research and development) ADDIE model. Subjects 40 students. The research site is Lirboyo 2 Elementary School, Kediri City. Statistical analysis analysis techniques. It was concluded that: 1) The validity of the product development of student teaching materials with the sub-theme of the beauty of cultural diversity in my country to improve the character of love for the homeland in students, with a score of 92-96. 2) The effectiveness of the product development of student teaching materials with the sub-theme of the beauty of cultural diversity in my country to improve the character of love for the homeland in students, with the average score of student test results being 83.12 > 75 above the KKM. 2) The practicality of product development of student teaching materials with the sub-theme of the beauty of cultural diversity in my country to improve the character of love for the homeland in students, with a score of 88.
Nurhikmah Hikmah
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 7, pp 65-76; https://doi.org/10.33541/edumatsains.v7i1.3869

Abstract:
Used cooking oil (Jelantah's oil) is a frying rest oil which can't be used again to fry because it contains compounds that are quite dangerous for human health, which can be destructive for humans healthy. Beside to reduce an ambient contamination, used cooking oil can be recycled as an alternative fuel, in this case as to replace kerosene. The purpose of this study was to determine the effect of the primary Air Fuel Ratio on the combustion process in pressurized stove oil and knowing whether or not the direct combustion process of used cooking oil as an alternative fuel. The filth on used cooking oil must be removed to avoid a streaming gagging on koil. Analyzing used cooking oil water rate. Fuel tank loaded with used cooking oil. Fill the compressor with an air to pressurize the fuel tank. Used cooking oil streamed inside the tank by manages flow rate then stream air with regulatory crane so up to scale which particular on flowmeter gases. Ruled air flow rate with scales regulatory crane flowmeter until up to stable state on appreciative given. Measuring temperature on burn tool with positioning different one (Spuyer, burner, burner's tip, kindled tip). The larger the primary Air Fuel Ratio, the better the mixing so that the total conversion of triglycerides into CO2 and CO products is greater. Used cooking oil may be directly used as an alternative fuel into an oil stove, especially pressured oil stove.
Anjela Noya, Djoko Rahardjo, Vinsa Cantya Prakasita
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 267-280; https://doi.org/10.33541/edumatsains.v6i2.3429

Abstract:
The purpose of this study is to determine the potential extract of areca nut (Areca catechu L.) seeds, skin and the combination of the two extracts in killing the Aedes aegypti larvae. This study used a Completely Randomized Design in the seed extract test with a concentration of 16000, 17000, 18000, 19000 and 20000 ppm and skin extract with concentrations of 7000, 8000, 9000, 10000 and 11000 ppm. The factorial design was used in the combined extract of 0:100; 25:75; 50:50; 75:25 and 100:0. Each treatment used 4 replications. Data were analyzed by ANOVA and then continued by Tukey, LSD and Duncan tests. The last, data were analyzed by probit analysis to determine LC50 and LC90. The result indicates that areca nut seed and skin contain flavonoid, alkaloid, palmitic acid, phenols, terpenoids and steroids which are toxic. The killing power of seed extract was 64-97% (24hours) and 100% in all treatments (48hours). Skin extract was 52-88% (24hours) and 58-93% (48hours), while the combination extract was 55 -93% (24hours) and 95-100% (48hours). Concentration of 19000 ppm of seed extract with 95% mortality at 24 hours was effective when compared to the WHO standard (2005), while the skin extract had a lower LC value than the other two extracts.
Minarsih Maria Sambo, Guruh Prihatmo, Dwi Aditiyarini
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 245-256; https://doi.org/10.33541/edumatsains.v6i2.3134

Abstract:
This study aims to determine and compare the concentration of Pb in Fuji apples from traditional markets and supermarkets. Samples were obtained from the outer Demangan market, the outside and inside Kranggan market, Superindo and Mirota Kampus. Samples were extracted using aqua regia HCl: HNO3 (3:1, v/v). Analysis of Pb concentration using Atomic Absorption Spectrophotometer (AAS). Data processing using SPSS with ANOVA test to determine the ratio of Pb concentration from each location. The average concentration of Pb in Fuji apple samples was obtained from the Demangan outside market (0.213 mg/kg), Kranggan outside market (0.208 mg/kg), Kranggan inside market (0.162 mg/kg), Superindo (0.147 mg/kg) and Mirota Campus (0.168 mg/kg). Based on the BPOM quality standard (2018), the concentration of lead in the outer Demangan market and the outside Kranggan market has passed the quality standard. As for the quality standard of SNI (2009) all concentrations are still within safe limits. So from the results of this study it can be said that the sales location is important to the lead content in Fuji apples, especially those sold near the highway, this is indicated by the highest lead concentration sourced from open sales locations and close to the highway, that is Kranggan outside market and the Demangan outside market. The treatment of washing fuji apples also showed a decrease in lead levels in fuji apples.
Dyah Aniza Kismiati, Ucu Rahayu, Mery Novianti, Zakirman, Yos Sudarso
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 333-342; https://doi.org/10.33541/edumatsains.v6i2.3592

Abstract:
The Covid-19 pandemic caused many significant changes in the learning system. By the implementation of online learning policies, it raises its own problematics until the emergence of ghosting phenomena in learning. The ghosting phenomenon is seen as the inactivity of students in online learning. This study is a type of quantitative descriptive research using survey method with a sample of 1,974 tutors at the Open University. The data was collected through questionnaire instruments shared online with tutors. The questionnaire instrument is an open question and there is also a likert scale. As a support, also conducted interviews with several tutors. The sampling technique used is a random sampling technique. The results of this study inform that 94.43% of tutors have experienced the phenomenon of ghosting carried out by students while 5.57% stated that there is no ghosting phenomenon in online learning. Of the 94.43% who stated the occurrence of the ghosting phenomenon, 31.05% of them think that ghosting is a phenomenon of student inactivity in online learning (not responding when called and invited to discuss), 20.62% of other tutors believe the same thing even admits that the ghosting phenomenon is common in online learning, other tutors also revealed some things related to ghosting in online learning. Thus, learning strategies are needed to overcome the phenomenon of ghosting in online learning.
Dinda Risdayani, Alpha Galih Adirakasiwi
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 343-362; https://doi.org/10.33541/edumatsains.v6i2.3613

Abstract:
Mathematical connection is one of the mathematical ability that need to be possessed and developed in students. Mathematical connection ability will help students build a much better understanding of mathematics. This research is a qualitative descriptive study that aims to describe students' mathematical connection ability in solving straight line equations. The research subjects in this study were three students of class VIII-D at SMPIT Nurul Husna Bekasi Regency, from 14 people. Subject selection based on written test results. The data collection technique described the mathematical connection ability test questions and interviews. Then, the data analysis technique used was data reduction, data presentation, and conclusion drawing. The study results showed that students with high mathematical connection ability had met the three indicators of mathematical connection, in contrast to students with low and medium ability who had not completed the three indicators of mathematical connections.
Jitu Halomoan Lumbantoruan
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 231-244; https://doi.org/10.33541/edumatsains.v6i2.3297

Abstract:
The research method used is descriptive qualitative. Collection of primary data and secondary data. Analysis with data reduction, presentation, conclusion and verification. Research at SMA Yadika 11, SMK 4 and SMA 7 Bekasi. The results of the analysis, 1) 95% of the online learning process is still from curriculum 13, the school facilitates teachers. However, when the implementation was not in line with expectations, this was because the material provided was not prepared with the standard of the initial ability of students, the books provided were not strong enough to build concepts, educators had difficulty writing symbols, student responses to professional competence were 79%, 70% of participants students assess that teachers do not have teaching materials and modules used as learning aids, observing 4 teacher materials have difficulty explaining related to writing symbols and proof. 2) The form of readiness by providing textbooks as the main source, however, books with cognitive dimensions. Lots and not hot books, this is not in line with curriculum 13. 3) The assessment method is prepared by the teacher, however, the assessment method is not given and the material tested is more difficult than what is taught and 60% disagrees with the teacher's assessment method.
Mariaulfa Mustam, Nurfika Ramdani, Irfan Syaputra
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 219-230; https://doi.org/10.33541/edumatsains.v6i1.2998

Abstract:
Given the existence of plastic waste in the environment is very dangerous, therefore it is necessary to conduct research to handle it. The development of technology for plastic processing to produce something useful continues to be carried out by various groups, ranging from scientists, academics, and students. One of them is the utilization of plastic waste into fuel oil (BBM) using the pyrolysis technique which will be installed to process plastic waste. The purpose of this study was to determine the fuel oil from processing plastic waste and compare the fuel with kerosene and diesel oil with the parameters of density, burning time and water temperature when heating using the three fuel oils. The research method used is data collection techniques including pre-treatment, the process to determine the density of each fuel sample, the process of burning time, temperature during heating, analysis of the density of pyrolysis oil, kerosene and diesel fuel by measuring the volume and the mass of each sample. Comparison of the quality of Fuel Burning Time, namely Oil from recycled plastics 4.01 minutes, Diesel Oil 4.45 minutes, and Kerosene 3.02 minutes. Comparison of the quality of water temperature with a volume of 20 ml of water and a heating time of 5 minutes, it is found that recycled plastic oil is 0.77oC, diesel oil is 0.73oC, kerosene is 0.84oC. plastic waste processing is under kerosene but above diesel oil based on density indicators, burning time, water temperature when heating.
Alfian Djafar, Muhammad Gilang Kentjana, Reza Kristiyanto, Yusuf Afudin
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 175-186; https://doi.org/10.33541/edumatsains.v6i1.3020

Abstract:
Washbasin needs to be provided in a place that is generally visited by people. It is necessary to design an automatic hand washing machine to reduce direct contact. This study aims to design and manufacture a simple automatic hand washing device, using a microcontroller and equipped with sensors to regulate the faucets and also regulate the release of the soap dish. This research has 3 stages. The first stage of planning includes the selection of actuators, sensors, and microcontrollers. Second, the manufacture of tools in the form of mechanical manufacture, electrical circuits, and programming. The final stage is testing, responding to tools that will function properly, and monitoring those that still need to be developed. Based on the research, the Automatic Hand Washing Station design tool uses a frame in the form of steel angles with holes SA75 3.75 x 3.75 with binders in the form of Hex Bolt and Nut M10, Arduino Uno R3 Microcontroller, Relay Module, Buck Converter, 2 Infrared Sensors, 5 LEDs, the actuators used are Single pump DC 12V 4.5A, servo motor 9.4 kgf.cm, reservoir with a capacity of 19 liters, and Power Adapter 12V 5A. The electronic system affects the performance of the actuator which results in the less functioning of the actuator itself. This connected obstacle is caused by the condition of the jumper cables that accumulate and also the less than the optimal output power. The programming system uses the Arduino IDE and can run well in the simulation tool process.
Fitrah Amelia
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 187-196; https://doi.org/10.33541/edumatsains.v6i1.3039

Abstract:
The purpose of this study was to analyze and determine the levels of metal content contained in refill drinking water circulating in the city of Batam. To achieve this goal, research activities were carried out 2 times sampling at 6 refill drinking water depots in Batam City. The research was conducted at the chemical laboratory of the University of Riau Islands and analysis of metal contamination was carried out by analysts using the ICP-MS method at the Indonesian Surveyor Laboratory in Batam using the services of an analyst. The methods used in this study include descriptive methods to determine sampling techniques, and laboratory examinations. From the results obtained, it can be concluded that the levels of Cu, Cd, and Pb metals in the 6 refill drinking water depots are below the standard that has been set based on SNI and Minister of Health regulations No. 492/Menkes/Per/IV/2010. So that the refill drinking water is fit for consumption.
Annisa Kurniawati, Hanifah Nurus Sopiany
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 363-376; https://doi.org/10.33541/edumatsains.v6i2.3614

Abstract:
This study aims to determine the types of student misconceptions in simplifying multiplications and division operations algebraic form. The research method used is a qualitative method with a descriptive approach, subject in this research were students VIIK at SMPN 1 west Karawang for the 2020/2021 academic year with a total of 20 students in early stages of data collection using test and non test instruments is questionnaires. Then the data are proceed to the second stages, that is taking 4 selected objects by purposive sampling where each objects represents highest,middle,lowest class categories based on test and non-tes result. 4 objects were taken to analyze related to the types of students misconceptions that arise in solving problems by referring to Bruner’s cognitive processes. The result of this study indicates types of misconceptions experienced by students due ti incompability with Bruner’s cognitive processes including; (a) misconceptions of notation due to an error in the transformation stage ; (b) generalization misconceptions due to errors in the information stage ; (c) misconceptions about the application of the rules due to an error in the information stage; (d) Misconceptions about the meaning of letters due to errors in the information stage.
Risky Nugroho, Attin Warmi
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 407-418; https://doi.org/10.33541/edumatsains.v6i2.3627

Abstract:
Purpose of this study was to determine the effect of learning motivation to student mathematics learning outcomes at SMPN 2 Tirtamulya. The method used is a quantitative method. The population in this study were all students of SMP Negeri 2 Tirtamulya for the academic year 2021/2022, with 18 students of class VIII being the research sample. Data learning motivation and mathematics learning outcomes were obtained using questionnaires and documentation. The independent variable in this study is learning motivation, while the dependent variable is the result of learning mathematics. The data obtained were then analyzed using descriptive statistics and inferential statistics. The results showed that learning motivation had a significant positive effect to student mathematics learning outcomes at SMP Negeri 2 Tirtamulya. The level of closeness of the relationship between learning motivation and student mathematics learning outcomes is in the very strong category. The magnitude of the influence of learning motivation on students' mathematics learning outcomes is 95.84%. Meanwhile, the influence of other factors on the mathematics learning outcomes of SMP Negeri 2 Tirtamulya students is 4.16%.
Rahayu Yekti Maryanto, Donny Hiskia Turnip
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 293-302; https://doi.org/10.33541/edumatsains.v6i2.3546

Abstract:
Dental caries is the most common infectious disease in the oral cavity and is still a dental health problem in Indonesia. Lack of knowledge about dental and oral health can increase the risk of dental caries. This study aims to analyze the level of dental health knowledge on the incidence of dental caries in students of the Faculty of Medicine, Christian University of Indonesia Class of 2019. This study is a cross-sectional design study conducted from January to December 2021 with a total of 138 respondents. Knowledge of oral health and the incidence of dental caries was assessed using a questionnaire. The results of the study: there is a distribution of students who have a good level of knowledge of dental and oral health as many as 115 people (83.3%) and students who experience dental caries events are 99 people (71.7%). Bivariate analysis of Spearman correlation test and obtained p value = 0.462 > alpha value (0.05). The conclusion is that there is no relationship between knowledge of dental health and the incidence of dental caries in students of the Faculty of Medicine, Indonesian Christian University Class of 2019. Better knowledge about dental and oral health can change a better attitude in preventing dental caries. Many factors can cause dental caries that is a lifestyle of consuming sweet foods, the habit of brushing teeth after eating and before going to bed and the tooth structure is different for each person.
Aulidia Nauval Kurnia, Nita Hidayati
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 419-430; https://doi.org/10.33541/edumatsains.v6i2.3618

Abstract:
Geometry is a mathematical branch that deals with the shape of an object, the spatial relationship between various objects, and its properties. Learning geometry is essential to supporting logical thinking ability, perceptual intuition, and reading and interpreting mathematical arguments. But many middle school students do not reach the stage of deduction and precision. The research was to analyze a high school student's geometry ability based on Van Hiele's stages of thinking. They consist of five levels of visualizing, analysis, sequence, deduction, and precision. It is a type of qualitative study with a descriptive method. The sample consisted of 20 eighth-graders in the located in the Karawang district. Data collection is carried out using a written questionnaire and test. Research shows that stage-0 (visualization) is the student's most achievable point from a questionnaire at 55% and a written test of 65%. The third stage (deduction) and fourth (accuracy) are the most difficult for students to achieve, based on written tests only 9% of students reach the third stage and only 6% of students reach the fourth. Student difficulties in learning this geometry may be due to several factors in their understanding of prerequisite materials, ability to concepts and pale-building qualities is lacking, and limited skill in using geometry ideas to solve mathematical problems.
Adonia Felma Mosse, Aniek Prasetyaningsih, Dwi Adityarini
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 17-30; https://doi.org/10.33541/edumatsains.v6i1.2474

Abstract:
Maintaining hand hygiene is an important habit to prevent disease caused by microorganisms and viruses. Handsanitizer is one of hygiene products as antibacterial and practical use. However, the use of alcohol as its main ingredient could irritate skin. Therefore, the alternative of alcohol is urgently found to prevent this side effect in same effectiveness. in this research, Binahong (Anredera cordifolia (Ten.) Steenis leaf extract and lemongrass oil (Cymbopogon citratus (DC.) Stapf) are used to replace alcohol as the main ingredient. This study aims to know the potential antibacterial activity of binahong leaf extract, lemongrass oil and its combination against S.aureus and its effectiveness as an active ingredient in hand sanitizer spray. Binahong extraction using the maceration method. The secondary metabolites of both extracts were identified by phytochemical assay. Then, their antibacterial activity was determined using a disk diffusion test for S. aureus. The organoleptic of hand sanitizer spray was observed. The highest antibacterial activity was obtained from the combination of binahong leaf extract and lemongrass oil 100% at ratio 1:1. This combination was used to formulate the hand sanitizer spray. The highest inhibitory activity of hand sanitizer spray was shown in the formulation with 3% active ingredients (extracts). This product had dark yellow in colour, distinctive aroma, and liquid texture and effectively suppresses bacterial growth on the hands. According to the results, binahong leaf extract and lemongrass oil are potentially used as active ingredients for natural hand sanitizer sprays.
Handayani, Dedi Duryadi, Hadi Alikodra3
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 5, pp 239-248; https://doi.org/10.33541/edumatsains.v5i2.2248

Abstract:
The family Rhinocerotidae is distinct and well defined, but systematic relationships among the four genera evaluated on the basis of geographical distribution of the different genera. The purpose of the research is to find out the genetic distance of rhinos in the world. Samples of Sumatran rhinoceros (Indonesia) are from SRS (Sumatran Rhino Sanctuary) Way Kambas National Park, while for Indian rhinoceros and white African rhinos. Amplification of cytochrome oxidase 1 (CO1) genes in mitochondrial DNA ( mtDNA) uses a specific primer for COI. The two primary pairs are Primer to amplify the partial CO1 sequence (RHCO1F & RHCO1R). CO1 amplification process PCR conditions used are: predenaturation at 940C, followed by the main cycle denaturation stage at 940C for 45 seconds, primary annealing stage (annealing) at 580C. analyzed provides genetic distance ranging from (0.016) to (0.147) for each species. Analysis of 711 bp of rhino DNA sequences can be shown in the form of a matrix of genetic differences. The genetic distance of the white African rhinoceros (Ceratorium simum) with the Sumatran torgamba rhinoceros is (0.142), while with the Indian rhinoceros (0.147) and the genetic distance between the Sumatran rhinos themselves there is a difference that the Sumatran rhino Bina differs by (0.136-0.147) with the other three individuals, while Torgamba has a genetic distance with Rosa of (0.014) but with a very close genetic distance (0.007), and Andalas (0.017), while the genetic distance is close to Bina (0.014) with Rosa (0.014).  
D. Desi, J. H. Lumbantoruan
Published: 31 December 2020
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 1, pp 23-34; https://doi.org/10.33541/edumatsains.v1i1.2452

Abstract:
This study aims to determine the feasibility of developing an mathematics story book. The method used in this study is "Research and Development". Meanwhile, the data collection technique in this study was a validator questionnaire from the experts, then quantitative and qualitative data were analyzed descriptively.Based on the results of research and development that has been done, it shows that: mathematics story books get a very decent percentage value. This percentage is obtained from the results of the validation of each expert i.e. Material experts with a percentage of 80.92%, experts in presenting material with a percentage of 79.16%, media experts giving a score of 93.75%, and linguists giving a score of 81.25%. So it can be concluded that the average value of the percentage of experts is in the very feasible category with a percentage value of 83.77%. Based on the explanation above, it can be concluded that the electronic mathematics storybook is very suitable to be used as a learning tool in class VII SMP in comparison material. Keywords: development, mathematics storybook, comparison.
Y. Isnaini, H. Pujiastuti
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 5, pp 51-64; https://doi.org/10.33541/edumatsains.v5i1.1630

Abstract:
  The ability to solve mathematical problems is an important part of learning mathematics that links daily life. The importance of having good mathematical problem solving skills, so understanding mathematics is also good, especially on the pythagoras theorem material. Material related to the construction of this triangle can be applied in calculations in real life. To be able to construct the concept of the pythagoras theorem problem, it needs an ability that can represent imagination into an object, this ability is called spatial visualization ability. This research will discuss the students' mathematical problem solving abilities on the pythagoras theorem material based on the spatial visualization abilities possessed by students. The research method used was a qualitative research with a descriptive approach to students of class VIII MTS 38 Jakarta. The test instrument was a matter of pythagoras theorem description and spatial visualization intelligence test. The results showed that students who have low spatial visualization skills tend not to be able to solve problem solving problems well, students who have moderate problem solving abilities can solve problem solving problems even though there are still steps that are not right, while students who have high spatial visualization abilities can solve problem solving problems with the right steps and answers.
Tara Inastu Kandarp, Aniek Prasetyaningsih, Vinsa Cantya Prakasita
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 31-46; https://doi.org/10.33541/edumatsains.v6i1.2798

Abstract:
Sunscreen is needed as protection against the skin from exposure to UV rays, because it will cause erythema, aging skin, blistering, and skin cancer, in skin that is not protected by sunscreen. This study aims to determine the in vitro and in vivo ability of epicarpium A. heterophyllus extract sunscreen cream preparations. This research was conducted in vitro and in vivo, beginning with the extraction process with the maceration method using 70% ethanol, identification of compounds in the extract, TLC, GC-MS, total flavonoids test, physical quality of cream preparations, SPF values ​​of extracts and creams, and in vivo sunscreen activity tests were conducted. The yield percentage produced from 450 grams of simplicia powder was 47.61%. The compounds in A. heterophyllus epicarpium extract are flavonoids, tannins, saponins, terpenoids, steroids, fatty acid groups, alcohol groups, and alkanes. Crude extract contains total flavonoids of 43.625 mgQE / g extract. The 75% concentration in the cream preparation had the highest SPF value of 8.173. The in vivo test used the MED (Minimal Erythema Dose) method of erythema scoring. A concentration of 75% gives the lowest MED value of 0.25. This research is expected to provide information on alternative uses of natural ingredients as the main ingredient of sunscreen so that the use of chemicals as the main ingredient will be reduced.
Ryan Nizar Zulfikar, Eva Dwika Masni
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 1-16; https://doi.org/10.33541/edumatsains.v6i1.2304

Abstract:
The purpose of this study was to analyze students' metacognitive strategies in understanding and solving math problems in terms of gender differences. This type of research is based on a qualitative approach with a descriptive research design. Purposive sample technique is a technique of determining the subject based on certain criteria to make it easier to obtain the desired information. Data collection techniques in this study consisted of interviews, tests, documentation and observations. The data analysis technique in this study consists of reducing data, presenting data and making conclusions. For data validity, this study used triangulation. Triangulation is done by triangulation method. Method triangulation in this research uses two methods, namely interviews and documentation. Based on the results of data analysis, it shows that four aspects of metacognitive strategies, namely the awareness aspect, cognitive aspects, planning aspects and re-checking in understanding and solving mathematical problems in the material of the two-variable linear equation system show that the metacognitive strategies of female and male students in class X SMA 8 Kupang can be said to be good in accordance with the minimum completeness criteria set at school. Even though in the awareness and evaluation aspects, it was still seen that male and female students did not use metacognitive strategies, because understanding the concept in solving story problems was still not understood about the differences in collecting known data and being asked by mathematical modeling. Overall, male and female students were able to understand and solve problems using metacognitive strategies.
Y.Y. Dhiki, L. Suryani
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 5, pp 1-8; https://doi.org/10.33541/edumatsains.v5i1.1591

Abstract:
Government demands the universities as the highest education institution, to compulsory produce quality graduates equipped with good potential and skilful in their respective fields. Thus, the students are expected not only to absorb the course material given, but also are able to apply it creatively. Success or failure of a student in higher education will be influenced by high spirit of life, and strong optimism towards success. Therefore, this study is aimed to investigate the influence of learning media and students’ motivation toward the learning outcome of mathematics education program. Survey is the method chosen for this study with quantitative approach, and 40 students were chosen randomly for solid geometry course in mathematics education program, Universitas Flores. Likert scale was used in the instrument of data collection techniques. Quantitative analysis was used with descriptive statistics, and involved Bivariate (Pearson) Correlation, Classical Assumption Test, and hypothesis testing. The findings show that the learning media (X1) and learning motivation (X2) seen as positive influence on learning outcomes (Y), it can been seen through the correlation analysis from R hiring for X1 against Y for 0.529 and X2 For Y the calculated R value was obtained for 0.732 and the significance value between X1 and X2 for Y abtained two asterisks (**) so that there was positive influence with a significance level of 1%. In other words, the more increase or the better the learning media and students’ motivation are, the more increase and the better the students learning outcome.
Matthew Linardi, Ratih Restiani, Dwi Aditiyarini
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 443-458; https://doi.org/10.33541/edumatsains.v6i2.3331

Abstract:
Javanese ginseng (Talinum paniculatum) is a plant that is used as raw material in traditional medicine because it contains flavonoid as one of it’s secondary metabolites. Increasing the flavonoid content in Talinum paniculatum can be done by applying elicitation to in vitro culture. Salicylic acid is an abiotic elicitor that is often used in elicitation because it can increase the production of secondary metabolites. The aim of this study was to determine the effect of salicylic acid concentration and elicitation time on callus biomass and flavonoid content in Talinum paniculatum callus culture. Talinum paniculatum callus production was carried out on MS medium with a combination of 2 mg/L 2-4,D and 3 mg/L kinetin. Elicitation was carried out on callus that had entered the stationary phase on the interaction of variations in the concentration of salicylic acid concentrations of 5 ppm, 10 ppm, 15 ppm, and 20 ppm and elicitation times were 2 days, 4 days, and 6 days. Each variations were replicated three times. The callus was dried and extracted and then the flavonoids were identified and measured semi-quantitatively using thin layer chromatography (TLC). The callus biomass elicited by varying the concentration of salicylic acid and elicitation time (0.052 – 0.067) was not significantly different from the control (0.067). The most optimal concentration and elicitation time were found at 20 ppm salicylic acid concentration and 2 days elicitation time with the largest flavonoid stain area (1.570 cm2), color intensity 3, and Rf value similar to control (0.5).
Damaris Lalang, Mariam Lanmay
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 431-442; https://doi.org/10.33541/edumatsains.v6i2.3447

Abstract:
Prevention of the spread of the 2019 corona virus disease by vaccination has become a controversy in a long conversation on Twitter social media. One way to classify these conversations is to use fuzzy clustering means. Fuzzy clustering means is used to group data into several classes with a high degree of similarity, therefore in the study entitled "the application of the fuzzy clustering means method for trending data on corona vaccine cases on the Twitter social network" aims to apply fuzzy clustering means and determine the trending topic of vaccine cases corona. The data is taken and processed using the r studio program with documentation techniques. In the process of implementing the fuzzy clustering means, it was successfully applied by obtaining the optimal value for the validity of the fuzzy silhouette index x 0.520397533360261 and being able to classify the data in two clusters and display the words vaccine, covid and vaccination as the most talked about words in the case of corona virus disease 2019 on twitter.
Wahyu Dani Swari, Basry Yadi Tang, Stormy Vertygo
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 5, pp 165-178; https://doi.org/10.33541/edumatsains.v5i2.2220

Abstract:
The research aimed at determining the Germination Rate Index (ILG) and Coefficient Velocity of Germination (KLG) of Soybean treated with liquid smoke derived from different plant materials. The seeds were soaked with liquid smoke from 3 different plant sources: Kesambi wood, coconut shell, and rice husk with each source were then divided into six variety of concentration: 0%, 10%, 20%, 30%, 40% and 100%. Analysis was conducted by calculating the GRI and CVG based on the parameters observed which were : Germination Time (GT) and Mean Germination Time (MGT). Results showed that liquid smoke derived from Kesambi wood gave the best result in promoting Soybean germination. Based on its ILG and KLG value . Results showed that liquid smoke derived from Kesambi wood gave the best result in promoting Soybean germination. Based on its ILG and KLG value, Kesambi wood-derived liquid smoke with 10% concentration gave the best value which were 50,00 and 2,00 respectively. On the other hand, liquid smoke derived from coconut shell and rice husk inhibited Soybean germination starting from 10% concentration. It is suggested to use liquid smoke derived from Kesambi wood to promote seed germination with lower concentration.
Adam Supriatna, Rafiq Zulkarnaen, Dani Firmansyah
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 5, pp 191-202; https://doi.org/10.33541/edumatsains.v5i2.2198

Abstract:
Students’ who have low mathematical anxiety cause themselves more confidence in learning mathematics and solving given problems, while mathematical habit of mind is a key aspect of student success in learning mathematics. This study aims at investigating the association of mathematical anxiety and habit of mind of high school students’. This study is survey research and it was conducted in a public senior high school in Karawang, West Java, Indonesia. The sample of this research consists of the 11th grade were 501 students’ taken using the cluster sampling method. The instrument used in this research covers mathematical anxiety and habit of mind questionnaire, and the data were analysed by using confirmatory factor analysis. The results show that students' mathematical anxiety was negatively associated with habits of mind. However, the result of the research indicates that dominant aspects of mathematical anxiety are: negative perceptions of mathematics learning, low mathematical achievement, lack of confidence, and mathematics tests. Meanwhile, the dominant aspect of habits of mind are: persevering, thinking metacognition, and working carefully and precisely.
Asti Dewi Nurhayati, Laksmi Putri Ayuningtyas, Hikmah Yuliasari
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 5, pp 211-224; https://doi.org/10.33541/edumatsains.v5i2.2237

Abstract:
The purpose of this research was to observe the student’s collaboration of food technology department in 2019 through basic physics practicum. The research method used classroom action research which was divided into four parts, that is planning, action, observation, and reflection. This research was done into four groups and accompanied by each observer. They had to take responsibility to observe the collaboration skill of each student in the group. The results of this research showed that the collaboration skill increased in every part. Group one of the first part showed a result of 45% with moderate success criteria, it increased in the second part to 51.11% (moderate), it increased in the third part to 76.67% (high), and it increased in the fourth part to 92.78% with very high success criteria. So it happened in group two, group three, and group four. Group two of the first part showed a result of 42.22% (moderate), in the second part to 51.117% (moderate), in the third part to 71.67% (high) and in the fourth part to 90% (very high). Group three of the first part showed a result of 46% (moderate), in the second part to 52.67 (moderate), in the third part to 79.33% (high), and in the fourth part to 92.67% (very high). Group four of the first part showed a result of 39.33% (low), in the second part to 56% (moderate), in the third part to 82.67% (very high), in the fourth to 92% (very high).
Sondang Rosita Indah
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 123-136; https://doi.org/10.33541/edumatsains.v6i1.2796

Abstract:
The application of a learning method will greatly affect the ability of students to understand a topic. The purpose of this study is to improve the learning outcomes of Biology of students by implementing cooperative learning model Gallery walk. This research was conducted at SMA Negeri 22 Jakarta in March to June 2019 using the action research method. Data collection is done through the provision of written tests to determine learning outcomes in studying ecosystems and environmental change. The data obtained were then analyzed by calculating the average value of the pretest and the average value of daily tests in cycle I and cycle II. The results showed that learning by applying Gallery walk cooperative learning can improve student Biology learning outcomes. Based on these results it can be concluded that Gallery walk cooperative learning can be used as an effort to improve Biology learning outcomes. The percentage of completeness of pre-cycle, cycle I, and cycle II respectively, namely 8.33%, 47.22%, and 88.89%. The learning outcomes of pre-cycle, cycle I, and cycle II respectively are 57, 68, and 76.
D. B. Sae, H. Sihotang
Published: 31 December 2020
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 1, pp 1-12; https://doi.org/10.33541/edumatsains.v1i1.2448

Abstract:
This study was to desribe the obstacles of Mathematics and Natural Sciences teachers at Christian Senior High School Rantepao in online learning during the Covid-19 pandemic. The study was a qualitative approach with descriptive analysis. Subjects in this study were 17 Mathematics and Natural Sciences teachers at Christian High School Rantepao. Data collection techniques using a questionnaire. The data were analized by descriptive percentage. The results of this study showed that Mathematics and Natural Sciences teachers at Christian Senior High School Rantepao experienced obstacles in online learning in the Covid-19 pandemic. Keywords: covid-19, , online learning, teacher, obstacles.
Setya Harianto, Aniek Prasetyaningsih, Vinsa Cantya Prakasita
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 47-60; https://doi.org/10.33541/edumatsains.v6i1.2799

Abstract:
Inflammation is protective response of vascular tissue to various harmful stimuli that characterized by pain, redness, and swelling. Empirically, stem bark of Ceiba pentandra has various chemical compounds that nutritious for health and have potential to be used as anti-inflammatory. This research will provide information the benefit of C. pentandra stem bark especially as anti-inflammatory agents and it’s correlation with the compounds. Maceration method with 70% ethanol was used in extraction and the yield was 75,54%. In phytochemical test, it was identified in crude extract contained flavonoids, tannins, saponins, steroids, β-sitosterol, 1,2-benzendiol, quinic acid, and octadec-9-enoic acid. On extract and ointment products C. pentandra has antioxidants activity with IC50 value of extract was 52,64 ppm and IC50 value of ointment products was 117,64 ppm. This research is included RAL experimental which was carried out on male mice that divided into 5 groups: negative control (ointment base), positive control (Betametasone valerate 0,1%), and 50%, 75%, 100% of C. pentandra ointment. The ointment was applied after the mice were induced by carrageenan, measured with the parameter of skinfold thickness of mice’s back every hour for 6 hours of observation. The result showed C. pentandra stem bark ointments has anti-inflammatory effect which %PI value in the 50%, 75%, 100% were respectively 10,85%; 18,99%; 30,84%.
Fira Nur Setiyana, Anggun Badu Kusuma
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 71-90; https://doi.org/10.33541/edumatsains.v6i1.2945

Abstract:
Information technology has a very important role in learning. YouTube is used as a teaching media to help overcome the difficulties of teaching and learning activities during the Covid-19 pandemic period. Providing sources of information in the form of materials and other additional information is very useful so students can understand the material optimally. The purpose of writing this article is to provide information so that it can be used as a source of readers about the potential for youtube utilization in mathematics learning. This research is a literature review that examines ideas, opinions, or findings contained in online articles and journals related to titles and research content so that it provides theoretical information. The results of this study concluded that the potential for youtube utilization in mathematics learning has a positive effect in increasing student learning interest and can motivate students to learn because information on YouTube is very diverse so that it will be useful in the current learning conditions.
Muhammad Shohibul Ihsan, Siti Wardatul Jannah
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 197-206; https://doi.org/10.33541/edumatsains.v6i1.2934

Abstract:
This study aims to determine the effect of blended learning-based interactive multimedia on students' scientific literacy skills. This type of research is a quasi-experimental study carried out with a non-equivalent control group design. This research was conducted in one of the high schools in Lombok, Indonesia, involving a control class and an experimental group. Pre-test and post-test were given by researchers to test students' scientific literacy skills in learning chemistry with the subject matter of oxidation-reduction reactions. The validity, reliability, and level of difficulty of the questions were tested using the Rasch Model. The statistical analysis used was the prerequisite test for data analysis and hypothesis testing using the t-test (Independent samples t-test) with the help of SPSS 20 for windows. The results showed that the average N-gain score of the experimental class students' scientific literacy was 78.5 with high criteria, the experimental class N-gain average score was 67.3 with medium criteria. So it can be concluded that the scientific literacy ability of the experimental class is higher than the control class and interactive multimedia based on blended learning affects increasing students' scientific literacy skills.
Chyntia Clarinda, Novalina, Mariana Gu, Faradiba Faradiba
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 257-266; https://doi.org/10.33541/edumatsains.v6i2.3339

Abstract:
Technological developments present many choices of learning media. The learning media that is the prima donna during the pandemic is a virtual laboratory. Virtual laboratories are used by teachers as a substitute for face-to-face practicum activities. There are many kinds of virtual laboratory applications that have been spread, one of which is the "PhET" simulation application. The purpose of this study was to determine the impact of using the PhET simulation application on improving student learning outcomes. This research was conducted at SMAN 54 Jakarta. The method used in this research is descriptive quantitative with the type of pre-experimental research. Data collection techniques used in this study were questionnaires and tests. Questionnaires and tests were used to obtain data on student learning outcomes. Data analysis used t test and N-gain test. The t-test was used to see if there was an effect of using a virtual laboratory on student learning outcomes. While the N-Gain test is to see how effective the use of virtual laboratories is to improve learning outcomes. The results of this study indicate an increase in student learning outcomes after using a virtual laboratory application.
Irma Rizki Amanda, Redo Martila Ruli
Edumatsains : Jurnal Pendidikan, Matematika Dan Sains, Volume 6, pp 389-406; https://doi.org/10.33541/edumatsains.v6i2.3616

Abstract:
Mathematical problem solving ability is one of the goals of learning mathematics that must be possessed by every student. This study aims to describe the mathematical problem solving ability of junior high school students in solving TIMSS questions on the topic of data and probability. This research uses a qualitative approach with a descriptive method. The research techniques used are tests, interviews, and triangulation. The results of the study were 6 students, 3 students met the indicators of identifying the adequacy of data, 4 students met the indicators of formulating a mathematical problem or making a mathematical model of a problem, 2 students meeting the indicators of applying strategies to solve mathematical problems, 1 student fulfilling the indicators of explaining or interpreting the results accordingly. the initial problem and re-examined the results of the answers, and 2 students fulfilled the indicators using mathematics in a meaningful way. The conclusion in this study is that the mathematical problem solving ability of junior high school students is still relatively low. This is due to several factors, namely students have not been trained to write down important points contained in questions such as what is known and asked, students are accustomed to directly answering questions without using mathematical calculations, in applying solving strategies students still find it difficult, and students are not accustomed to giving conclusions and recheck the results of the answers.
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