bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effectiveness of Problem-Based Flipped Classroom Model in Improving Chemistry Learning Outcomes of Buffer Solution
Authors: Musva Nurul Lestari , Erna Maria , Abdullah Abdullah
Published: March 2024

The concept of buffer solutions is ubiquitous in everyday life, encompassing macroscopic, symbolic, and microscopic representations. Effective learning of these concepts requires students to understand the subject matter, analyze it, and apply their knowledge to real-life situations. This study aimed to assess the impact of problem-based learning in a flipped classroom model on the learning outcomes of 11th-grade science students studying buffer solutions at SMAN 12 Pekanbaru. The study employed a quasi-experimental design with a pretest-posttest control group. The sample consisted of two groups of 11th-grade science students: Group 3 served as the experimental group and Group 4 as the control group. Data was collected through a test and analyzed using t-test in SPSS 22. The results revealed that the problem-based learning approach in the flipped classroom model effectively improved the learning outcomes of 11th-grade science students studying buffer solutions at SMAN 12 Pekanbaru. The experimental group showed an average improvement of 7.394 over the control group, with a significant (α) t-value of 0.013.
Enhancing Students' Visual-Spatial Abilities through the Use of Bonat Berakal Media in Understanding Shapes of Molecules
Authors: Winata Anggun
Published: March 2024

Students in 10th grade often get low learning outcomes on one of the chemical concepts, the shapes of molecules. Based on the test results, it can be seen that most students have difficulty on understanding and drawing the shapes of molecules. Many students have difficulty drawing shapes of molecules because shapes of molecules cannot be observed directly using the sense of sight, so students cannot project molecular images on their minds. The inability of students to understand molecular drawings in predicting the shape of molecules may be related to spatial visual abilities. The study aimed to investigate the effectiveness of using Bonat berakal media in enhancing tenth-grade students' visual-spatial abilities in understanding shapes of molecules. The students from classes A, B, and C in academic year 2022/2023 at SMAN 1 Tuban participated in the study. The research design was one group pre-test post-test. The instruments used were a teaching module on shapes of molecules and a spatial visual test. The data was analyzed using N-Gain score. The results showed that the pre-test average of students' spatial visual abilities was low but improved to a high category post-test. The study concluded that the use of Bonat berakal media was effective in improving students' visual-spatial abilities in shapes of melecules concepts, as indicated by an N-Gain score of 0.620.
Application of Problem-Based Learning (PBL) on Hydrocarbon Compound Lesson to Increase Student Learning Outcomes
Authors: Karepesina Nur Gaib , Manuhutu Julita B.
Published: March 2024

This study aims to improve the learning outcomes of 11th grade Science 4 state senior high school (SMAN) 3 Ambon on the subject material of hydrocarbon compounds by using the Problem-Based Learning model. This research was conducted with 37 11th-grade Science 4 students as the research sample. The data was collected by tests, observation sheets, and worksheets. Data were analyzed descriptively by percentage and n-gain with categories. The results of the research showed that the student’s learning outcomes were achieved with different qualifications. There are 2 students (5.41%) who had very good qualifications, 27 students (72.97%) were in good qualifications, 5 students (13.51%) are in fair qualifications, and 3 students (8.11%) are in poor qualifications/failed. N-gain achievement of 28 (75.68%) students was in the high category and 9 (24. 32%) students were in the medium category. The results of the analysis of the average normalized gain score for all students are 0.77 which is in the high category. Therefore, the Problem-Based Learning (PBL) model can improve student learning outcomes.
Analyzing Misconceptions of Acid-Base Topic among Chemistry Education Students in Online Learning Settings: A Case Study
Authors: Djarwo Catur Fathonah , Kafiar Frans Pither
Published: March 2024

This study aims to identify the misconceptions of 11 third semester Chemistry Education students at Cenderawasih University in relation to online learning during the Covid-19 pandemic. Online learning poses various challenges for both students and lecturers, resulting in incomplete explanations and hindering students' understanding of the material, leading to possible misconceptions. A descriptive qualitative method was employed, utilizing diagnostic tests with a Certainty or Response Index (CRI) and interviews. The findings revealed that 41% of the students had a clear understanding of the acid-base concepts, 30% lacked understanding, and 29% had misconceptions. The students' misconceptions related to six subconcepts in acid-base materials, including acid-base theory, acid-base indicators, acid strength (pH), weak acid-base equilibrium constant (Ka/Kb), calculation of solution pH, and the concept of pH in the environment, with a range of misconceptions from 9-45%. This study highlights the need for addressing misconceptions in online learning, specifically in the acid-base topic, to ensure effective understanding and learning outcomes for students.
Screening of Rhodomyrtus tomentosa (Aiton) Wight (Karamunting) Compounds that Have the Potential for Breast Cancer
Authors: Hadi Samsul , Nastiti Kunti
Published: March 2024

Breast cancer is the highest disease in the world beating lung cancer, so various alternatives are needed to find a treatment. Screening drug discovery against breast cancer by targeting BCL-2 occupies the main position and is the goal of this study. The method used is insilico. the material used is 10 compounds from R. tomentose, 2w3l protein from RCSB, PLANT docking software, the docking coordinate used is X: 39.8057 Y: 26.9355 Z: -12.4145 with a radius of 11.1871, then to find out the type of bond and residue involved using discovery studio. The results of this study were docking scores from -91.3871(5'-Desgalloylstachyurin) to -65.4754 (Afrormosin), activity predictions from PASS online from 0.174 (Rhodomyrtosone C) to 0.799 (Lupeol). Based on the docking score, three compounds that have the potential to inhibit the work of BCL-2 were obtained namely 5'-Desgalloylstachyurin, Rhodomyrtosone B and Rhodomyrtosone D.
The Effect of Using Zenius.Net-Based Learning Video Media on Student Chemistry Learning Outcomes at MA Anshor
Authors: Safitri Baiq Rina Amalia , Pahriah Pahriah , Putrayadi Wawan
Published: March 2024

The purpose of this study was to determine the effect of the use of Zenius.Net based learning video media on student chemistry learning outcomes. This type of research is descriptive quantitative. This research was carried out using the One Group Pretest-Posttest Design method which means that there is only one research group used. This research was conducted at MA Anshor with a total of 15 students, namely 10th grade as many as 8 people, and 11th grade as many as 7 people. Learning outcome data is taken based on students' cognitive tests. The data analysis technique used in this study combines descriptive data analysis for mean measurement and inferential statistics for significance testing of t-test values. The significance of the N-gain value is tested using a t-test (paired samples t-test). The average score obtained by students after using zenius.net-based learning videos of 76.47 is greater than the average score obtained by students before being given.
Development of Student Worksheet Based on Learning Cycle 5E on Stoichiometry Material
Authors: Lydra Iqbal Abdan , Mawarnis Elvy Rahmi , Herman Mimi
Published: March 2024

This study addresses the insufficiency of teaching materials in the learning process and its negative impact on students' comprehension of provided material. To alleviate this issue, student worksheets based on Learning Cycle 5E were developed to be used as a learning resource for 10th-grade students studying stoichiometry at State Senior High School (SMAN) 1 X Koto Singkarak. The aim of this research was to create a valid and practical Student worksheet based on Learning Cycle 5E. Development research with the 4-D development model (define, design, development, and disseminate) was employed, with the first three stages executed. The define stage was conducted to identify the school's conditions and problems, while the design stage was used to create the initial student worksheet based on Learning Cycle 5E for stoichiometry material. The develop stage was carried out to refine the worksheet. Data were gathered using validation sheets and practicality questionnaires filled out by two chemistry lecturers, one chemistry teacher, and 10th-grade students of SMAN 1 X Koto Singkarak. Data analysis was conducted using a quantitative descriptive method. Results indicated that the Student worksheet based on Learning Cycle 5E met the valid criteria with a validation score of 91.37% and the practical criteria with a student response questionnaire score of 82.09%. Thus, the worksheet can be used as a learning resource.
Development of Articulate Storyline 3-Based for Chemical Bonding Teaching Materials
Authors: Lestarani Dewi , Tanone Kalista L.K. , Parera Lolita A.M. , Lalang Arvinda C. , Naat Johnson N.
Published: March 2024

The development of Articulate Storyline 3 (AS3)-based chemistry teaching resources on chemical bonding is the aim of this research. the subject of research was 10th-grade senior high school students. This research was conducted to investigate the form of creation and viability of chemical bonding teaching materials using the AS3 application. Minor modifications are made to the Borg and Gall method for instructional design for the production of AS3-based chemical bonding teaching materials. The technique consists of five steps: preliminary studies, product design plan (planning and development), product validation (validation design and revision), field trials, and final product dissemination. The instruments used in this study were interview sheets, questionnaires in the form of instrument validation for material experts, and media experts, tests for students, and documentation. Material expert data, media, and student responses were obtained and analyzed to describe the validity and feasibility of teaching materials. The findings indicated that the optimal percentage was 96.42%, while the very excellent percentage was 96.66%. The results of the evaluation of the feasibility of teaching materials by material specialists and media specialists were 83.07% and 84.61 %, respectively, in the very excellent category. According to the findings of expert evaluations and field testing of chemical teaching materials based on AS3, this chemical bond material is very appropriate for use in educational settings.
A Characterization of Virgin Coconut Oil Obtained via Extraction Utilizing Tamarind Seed Skin Waste
Authors: Ilyas Muhammad Ali , Multazam Ahmad , Hidayatulloh Alpiana , Fajri Nefi Andriana
Published: March 2024

This study aims to provide a characterization of virgin coconut oil obtained through the acidification method, using tamarind seed skin as an oil extractor. The utilization of tamarind seeds is motivated by the fact that they are considered a waste product and are not commonly used by the community. Additionally, tamarind seeds contain organic acids, such as citric acid, tartaric acid, and malic acid, which can effectively hydrolyze the bond between oil and other substances in coconut flesh, such as proteins and carbohydrates. The characterization of virgin coconut oil includes a range of tests, such as organoleptic evaluation, density measurement, moisture content determination, free fatty acid analysis, and peroxide number determination, which are compared to coconut oil produced through heating. The virgin coconut oil is extracted from grated coconut flesh by mixing tamarind seed skin, which has been mashed, with grated coconut flesh in a 1:4 ratio. This mixture is then homogenized and incubated for approximately 10 minutes to extract the oil. The organoleptic evaluation results of the virgin coconut oil produced through acidification demonstrate a light yellow color with no detectable taste or odor, while the coconut oil produced through heating has a dark yellow color, a slightly rancid smell, and a distinct coconut oil taste. The density of the virgin coconut oil produced through acidification and heating is 0.870 g/mL and 0.868 g/mL, respectively. The moisture content of the virgin coconut oil produced through acidification and heating methods is 0.1713% and 0.1700%, respectively. The free fatty acid content for the acidification and heating methods is 0.14% and 3.252%, respectively. The peroxide number test shows that the acidification method yields a higher value of 27.41 meq O2 / kg compared to 5.694 meq O2 / kg for heating.
Implementation of Project-Based Learning: Utilizing Natural Rocks as Waste Absorbents
Authors: Manasikana Oktaffi Arinna , Hayati Nur , Af'idah Noer , Rasyidi Mulia
Published: March 2024

The current study explores the advantages of project-based learning, which involves using real-world problems as a basis for gathering and integrating new knowledge. Specifically, the study investigates the implementation of project-based learning in the Solid Interface course within the Natural Science Education program. Through direct practice, students are required to master the course material, making it more applicable to real-world situations. To assess the effectiveness of this approach, an experimental method was used, which involved students conducting experiments, observing and experiencing the process, and presenting their results to the class for evaluation. This method provides students with the opportunity to learn independently, follow a process, analyze objects, draw evidence, and draw their own conclusions from the process being carried out. The objective of this research is to apply the project-based learning model and explore the utilization of natural zeolite rocks as an absorbent for heavy metal ions, specifically Plumbum and cadmium waste. The study successfully implemented the project-based learning approach, and the stages were carried out successfully. The results showed that cadmium is a silvery white metal that can be forged, and exposure to this metal can cause paralysis and even death. The study investigated the adsorption of metal ions by chelate Zeolite-EDTA on variations of particle size, including 212 μm, 125 μm, and 90 μm, with an adsorbate/adsorbent ratio of 20 mL/g, 30 mL/g, 40 mL/g, and 50 mL/g. The results indicated that the best adsorption of lead waste occurred with Zeolite-EDTA chelate at a particle size of 212 μm, with an adsorbate/adsorbent ratio of 30 mL/g. For cadmium wastewater, the best adsorption was achieved with Zeolite-EDTA chelate at a particle size of 212 μm, with an adsorbate/adsorbent ratio of 20 mL/g. These findings contribute to the growing body of literature on project-based learning and the use of natural zeolite rocks as an absorbent for heavy metal ions.
Improving Students' Basic Chemistry Competences Through Implementation of Class-Based Assessments in Inquiry-Based Chemistry Learning
Authors: Suherman Suherman
Published: March 2024

This study aims to improve students' basic competencies in Chemistry subjects on Compound Polarity by implementing Authentic Assessment assessments in inquiry-based Chemistry learning. This type of research is classroom action research, which consists of two cycles. Each cycle consists of four stages: action plan, implementation, observation/evaluation, and reflection. This research was carried out in the 11th grade of science (IA) 2 class, state senior high school (SMAN) 2 Dompu involving 36 students in 2021. Data on students' cognitive competence are collected by the test method, data on students' affective competence are collected by observation method, and data on students' psychomotor competence are collected by observation method. Furthermore, the three data were analyzed descriptively. The findings of this study showed that (1) there was an increase in students' cognitive competence from an average score of 67.72 with classical learning completeness of 52.84% in cycle I to an average score of 77.60 with classical learning completeness of 87.29% in cycle II, (2) there was an increase in students' affective competence from an average score of 81.40 with a suitable category in cycle I to an average score of 86.80 with an excellent category in cycle II, and (3) there was an increase in students' psychomotor competence from an average score of 67.43 with good category in cycle I to an average score of 78.25 with good category in cycle II. Thus, it can be concluded that there is an increase in students' basic competencies in chemistry through the implementation of classroom-based assessment in inquiry learning.
Enhancing Students' Science Process Skills through the Implementation of POGIL-based General Chemistry Experiment Manual: A Quantitative Study
Authors: Aini Faizah Qurrata , Fitriza Zonalia , Iswendi Iswendi , Rivaldo Ifan , Mawardi Mawardi , Putri Annisa Khairani
Published: March 2024

This study focuses on the development of a POGIL-based experiment manual for general chemistry courses to enhance students' science process skills. The research and development (R&D) method, utilizing the Plomp model, was employed to create a valid and practical manual. Data were collected through a validity and practicality questionnaire, which was then analyzed using the Kappa Cohen's method. The manual's content was found to be highly valid, with an average score of 0.82, while its graphics had an average score of 0.84, also falling within the high category. Practicality was assessed through small group student testing, revealing high practicality scores in terms of user convenience, attractiveness, and benefits, with an average score of 0.77. Overall, the results indicate that the POGIL-based general chemistry experiment manual developed in this study is both valid and practical.
Development of an Electronic Supplementary Book on Water Pollution
Authors: Daniela Tya , Melati Husna Amalya , Erlina Erlina , Sasri Risya , Hairida Hairida , Lestari Ida
Published: March 2024

Water pollution is a scientific study of environmental chemistry on the sources, impacts and fate of chemicals in the aquatic environment, as well as the effects of human activities on them. As a student, you are required to have broad insight and knowledge, especially in dealing with environmental problems in society, by creating a caring character of the environment and finding solutions as an effort to overcome these problems. The purpose of this study is to produce educational materials in the form of additional e-books about water pollution, raising real problems that exist in the surrounding community. In addition, feasibility test and student responses were also measured against the Electronic Supplement on Water Pollution Equipment. The method employed in this study is R&D with the ADDIE model. Research data were collected through speaker and student interviews, due diligence questionnaires and student response questionnaires. The results of the feasibility test conducted by the expert validator on the Electronic Supplementary Book on Water Pollution Material show that the feasibility test for material, language and graphics is 1.00 with a very high validity category. The results of student responses to the Electronic Supplement Book on Water Pollution Material in the limited trial produced a percentage of 86% in the very good category and field trials produced a percentage of 93%.
Deskripsi Pemahaman Konsep pada Materi Struktur Atom di Kelas X SMA Negeri 01 Ngabang
Authors: Diannisa Nyemas Firda , Erlina Erlina , Harun Andi Ifriany , Sahputra Rachmat , Ulfah Maria
Published: March 2024

Pemahaman konsep sangat penting bagi siswa agar mengerti pada materi yang dipelajari dan lebih mudah untuk mengikuti pembelajaran pada tingkatan yang lebih tinggi. Struktur atom memuat materidasar kimia untuk memahamimateri kimia yang lebih tinggi. Penelitian ini bertujuan untuk mendeskripsikan pemahaman konsep siswa pada materi Struktur Atom. Keterbaharuan dalam peneltian ini yaitu menggunakan indikator pemahaman menurut Anderson & Krathwohl dan kriteria pemahaman yang diadaptasi dari penelitian Akkuzu dan Uyulgan (2016). Metode penelitiannyaadalah deskriptif kuantitatif yang dilaksanakan di SMA Negeri 01 Ngabang, sampel penelitian adalah 35 orang siswa kelas X MIPA A.Teknik pengumpulan data yaitu teknik pengukuran berupa tes tertulisberbentuk esai. Dilakukan analisis data secara deskriptif kuantitatif. Hasil penelitianmenunjukkan sebanyak 52% siswa yang menjawab dengan benar pada konsep partikel penyusun atom yang menunjukkan kategori Menunjukkan Pemahaman (MP) dan sebanyak 73% siswa tidak memberikan tanggapan pada konsep sifat keperiodikan unsur yang menunjukkan kategori Tidak Ada Tanggapa (TA).Kata Kunci: deskripsi, pemaham konsep, struktur atomDescription of Understanding Concepts in Atomic Structure Matter in Class X of SMA Negeri 01 NgabangAbstractConceptual understanding is very important for students to understand the material being studied and it is easier to follow learning at a higher level. Atomic structure contains basic chemical material to understand higher chemical matter. This study aims to describe students' conceptual understanding of Atomic Structure material. The update in this research is to use understanding indicators according to Anderson & Krathwohl and understanding criteria adapted from research by Akkuzu and Uyulgan (2016). The research method was descriptive quantitative which was carried out at SMA Negeri 01 Ngabang, the research sample was 35 students of class X MIPA A. The data collection technique was a measurement technique in the form of a written test in the form of an essay. Data analysis was carried out in a quantitative descriptive manner. The results showed that as many as 52% of students answered correctly on the concept of atomic composing particles which indicated the Demonstrated Understanding (MP) category and as many as 73% of students did not respond to the concept of periodicity of elements which indicated the No Response (TA) category.
Development of Student Worksheets based Process Oriented Guided Inquiry Learning to Remediate Student’s Misconceptions on Acid and Base
Authors: Ummah Amalia Munjiatul , Nasrudin Harun
Published: March 2024

This study aims to describe the feasibility of POGIL-based student worksheets to remediate misconceptions in terms of validity, practicality, and effectiveness, with the object of research of 11th grade students of Al-Islam Krian High School. Validity was measured from the content and construct validation sheets. The responses and activities of students measure practicality. Effectiveness is measured by the percentage of misconceptions that turn toward understanding the concept. The development of this Student Worksheet refers to the development of Research and Development (R&D). The model used is the 4D model, which consists of 4 stages, namely define, design, development, and dissemination. The research that has been carried out is limited to the development stage in the trial step. The validation result data is ordinal data that can be analyzed by determining the mode of each assessment aspect. The validity of worksheet is reviewed from the validity of content and construct which obtained a mode score of 4 with a valid category. The practicality results show that the worksheet is efficient with the activity for each trial of 95.56%, 95.56%; and 97.22%. The practicality of worksheet based on the POGIL learning model in terms of student response questionnaires using a Guttman scale through positive and negative statements with the answers "Yes" or "No" with the results of positive student responses of 95.78%.The effectiveness of the worksheet in terms of the results of shifting misconceptions towards understanding concepts was 81.06% in the theory of acids and bases, 70.09% in the strength of acids and bases, and 69.86% in acid and base indicators, with a significance value of 0.000 in the Wilcoxon test. The results showed that the POGIL-based worksheet developed was feasible to be able to remediate students' misconceptions on acid and base materials.
21st Century Skills: The Perspective of Chemistry Teachers in Indonesia
Authors: Setiawan Nur Candra Eka , Putri Daratu Evina Kusuma , Marfu'ah Siti , Pramesti Indah Nur , Rosli Mohd Shafie
Published: March 2024

The 21st century provides many changes and challenges for teachers and students. The rapidly developing digital era broadly impacts learning development in Indonesia. The Ministry of Education and Culture of the Republic of Indonesia has promoted the implementation of an merdeka curriculum which provides flexibility for teachers to develop students' 21st century abilities. The new merdeka curriculum was established so that teachers are still adapting to these changes. This article reviews the perspectives of chemistry teachers on 21st-century skills that have developed in Indonesia. The research method used is descriptive qualitative with surveys, questionnaires, and interviews. Respondents were Chemistry teachers, totaling eighty-four teachers and scattered throughout Indonesia. Interviews followed this up with ten teachers deliberately selected from the overall sample. The results showed that 94% of Chemistry teachers understand the importance of 21st-century skills. The study reveals that optimizes 21st-century skills. Several ways can be taken, namely, using constructivist learning methods to improve skills, providing engaging learning media, making motivational learning videos, and providing more time for students to complete problem-based learning or projects. They mentioned several challenges that hindered them from applying 21st-century skills in their teaching practice. The reasons for time constraints and concerns about teaching chemistry concepts were not completed according to schedule; the assessment needed to be more optimal because it was still focused on written tests and limited resources and infrastructure. Despite the many challenges, most teachers are still keen to implement learning that applies 21st-century skills in their classes.
The Effectiveness of Student Worksheet Based on Scientific Literacy to Train Argumentation Skills on Factors that Affecting Reaction Rate
Authors: Batari Nirmala Puteri , Rusmini Rusmini
Published: March 2024

This study purposes to determine the effectiveness of scientific literacy-based worksheets to practice students' argumentation skills on the factors that affect the rate of reaction. The variables of this study were argumentation skill and science literacy. Subject and population of this study were 35 student of class XI IPA at SMAN 12 Surabaya. The analysis of this study used the N-gain and statistical tests including the Wilcoxon test and the Spearman test. The effectiveness of Student Worksheet was stated to be very effective in terms of the scientific literacy test with N-Gain score of 0.7 in the high category and an argumentation test with N-Gain  score of  0.8 in the high category. Supported by the Wilcoxon test with acceptance of H1 which showed an average difference in scientific literacy and argumentation before and after treatment, and the Spearman correlation test gets an rho of 0.873 which indicates a strong relationship between literacy and argumentation.
Validity of Student Worksheet Based on Scientific Literacy to Train Argumentation Skills on Buffer Solution
Authors: Kumalasari Maya , Suyono Suyono
Published: March 2024

The purpose of this research is to produce student worksheet based on scientific literacy to train argumentation skills on buffer solution seen from content and construct validation. The research subject were high school students grade XI. This research is development research with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation) which is limited to the development stage to find out the validation of student worksheet. The instrument used to obtain validity data (content and construct) is a validation sheet. The validity of the developed student worksheet is based on the assessment of three validators through expert judgment namely two chemistry lecturers and one chemistry teacher. Student worksheet based on scientific literay is declared the validity criteria if it gets a minimum assessment mode of 4 (valid) from a range of 1 to 5 on a Likert scale. The results showed that all components of the assessment both content validity (relevance) and construct validity (consistency) received an assessment mode of 4 with a valid category. So that the student worksheet based on scientific literacy was declared valid to train argumentation skills on buffer solution.
Implementation of Expository Learning Integrated with Active Students Learning Strategy to Improve Learning Outcomes in Stoichiometry
Authors: Wijaya Ion , Muchlis Muchlis , Mumpuni Ariwati Wahyu
Published: March 2024

Stoichiometry material is often still considered difficult for students in learning chemistry, causing low learning outcomes. This study aims to determine the effect of integrating the Expository Learning with the Active Student Learning  on student learning outcomes in stoichiometry material in class X-4 SMA Negeri 1 Kediri. This research involved 36 students of class X-4 SMA Negeri 1 Kediri as research subjects. This research used classroom action research method with two cycles. The results showed an increase in the average learning outcomes of students. Before the research (T0), the average score was 65.33, categorized as low, with a learning completeness rate of 55.56%. In cycle 1 (T1), the average score increased to 80.56, classified as good, with a learning completeness rate of 75%. In cycle 2 (T2), the average score increased to 88.47, classified as very good, with a learning completeness rate of 88.89%. Based on these results, the integration of the expository learning with active student learning can be considered for use in students who have a low understanding of chemical concepts in order to improve their learning outcomes on stoichiometry material.
Development of Problems for Higher Order Thinking Skill (HOTS) e-Test on Additive Substance Subject Material
Authors: Wulandari Ina , Hairida Hairida , Rasmawan Rahmat , Enawati Eny , Muharini Rini
Published: March 2024

Indonesia is one of the countries with low PISA (Program for International Students Assessment) achievement levels based on survey results due to the low level of higher order thinking skill of students. The causes of the low level of higher order thinking of students in Indonesia include the question given have not met the criteria of HOTS questions and the lack of ability of educations in making Higher Order Thinking Skill (HOTS) questions. This study was conducted to determine the feasibility of HOTS e-questions. The aim of developing higher-order thinking Skill (HOTS) questions in electronic form in the conditions of transition from pandemic to endemic now is so that they are easily accessible to students anywhere and at any time. The method used in this research is research and development (R&D) with ADDIE model which has 4 stages, namely: Analysis; at this stage, needs analysis and performance analysis are carried out, Design; at this stage, the process of designing or creating learning tools occurs, Development; at this stage, learning tools are developed and validated from previously selected learning sources, Implementation, and Evaluation. The form of questions that have been developed consists of multiple choice and eesay questions and scring guidelines. The overall validation results of the HOTS e-questions amounted to 94.47% with very feasible criteria. Based on the validation results, HOTS e-questions on additive are suitable for use in learning activities and are tested during science subjects at school.
Ethnochemistry: Exploring the Silk Ecoprint Steaming of Kampung Sabbeta as a Source of Learning Chemistry
Authors: Yusaerah Nur , Anugra Novia , Anwar Desy , Nurfadillah Nurfadillah
Published: March 2024

Kampung Sabbeta is one of the community empowerment locations that is developing ecoprint techniques for natural materials as fabric dyes and eco-friendly motif printers in Soppeng Regency, South Sulawesi Province. Considering the importance of knowledge about the environment, it is necessary to provide environmental management using natural materials as an effort to foster awareness of learning that is integrated with local wisdom values. This research was carried out to reveal the chemical aspects contained in the process of making steamed ecoprint fabric starting from the scouring, mordanting, ecoprinting, steaming and fixation processes which can be used as a resource for learning chemistry. The aim of this research is to reveal the chemical aspects and fundamental chemical activities contained in the silk steaming ecoprint process in Kampung Sabbeta. This research uses a type of qualitative descriptive with ethnographic methods, observation, interviews, and documentation. Data analysis in this research uses source triangulation which was carried out inductively, so that in this study key informants, main informants and supporting informants were determined in each aspect that became the object of research. The results show that the fundamental activities involved in the process of making silk ecoprint steaming in Kampung Sabbeta include formulating, measuring, purifying, fabricating, and playing. The chemical concepts that can be uncovered are solution preparation, purification, unit conversion in chemistry, adsorption, natural oxidation reactions, heat transfer.
Pengembangan Model Pembelajaran Sains Berorientasi Literasi Sains bagi Mahasiswa Calon Guru Kimia
Authors: Junanto Tulus , Sartika Rody Putra
Published: March 2024

Pendidikan sains memiliki peran yang penting dalam menyiapkan siswa memasuki dunia kehidupannya. Tujuan yang ingin dicapai dalam penelitian ini adalah a) mendeskripsikan peningkatan aktivitas belajar siswa menggunakan metode pembelajaran pendekatan sains teknologi masyarakat (STM) yang berorientasi literasi sains, b) mengembangkan metode pembelajaran pendekatan sains teknologi masyarakat (STM) yang berorientasi literasi sains, c) mendeskripsikan efektifitas pengembangan metode pembelajaran pendekatan sains teknologi masyarakat (STM) yang berorientasi literasi sains. Metode penelitian ini adalah Education Research and Development (R&D) yaitu penelitian dan pengembangan. Penelitian dan pengembangan (R&D) dikhususnya pada pembelajaran IPA pada pengembangan metode pembelajaran pendekatan sains teknologi masyarakat (STM) yang berorientasi literasi sains. Berdasarkan hasil penelitian, model pembelajaran berorientasi literasi sains dinilai layak oleh pakar model pembelajaran karena sesuai dengan memenuhi kriteria model pembelajaran. Model pembelajaran ini praktis berdasarkan nilai kepraktisannya karena terstruktur jelas dan praktisi juga dapat dengan mudah menggunakannya. Model pembelajaran berorientasi literasi sains efektif diterapkan. Hal ini dapat dilihat dari nilai kelas ekperimen yang lebih baik dibandingkan nilai kelas kontrol.
The Analysis of Science Process Skills (SPS) of 11th Grade Science Students
Authors: Mawarnis Elvy Rahmi , Akbar Ilham , Herman Mimi
Published: March 2024

This research is motivated by students who do not understand chemistry lessons, especially in explaining formulas and calculations. Even though the learning methods and models used by teachers are different so that students have a "mindset" that learning chemistry is a difficult subject to understand. Another problem experienced by the teacher during learning, only the teacher is actively involved during learning while students are more dominant in listening to the teacher's explanation. The purpose of this study was to analyze and find out the Science Process Skills (SPS) of 11th grade science students at SMAN 1 Pulau Punjung. This research method is qualitative (descriptive). The subject of this research was the class of Stage F.2 which consisted of 27 students. Data collection techniques in this study were observation techniques, interview questionnaires, SPS documentation and questionnaires.  The data obtained relates to the science process skills of students. Furthermore, researchers used data analysis techniques, namely the theory of Miles and Huberman which included data reduction, data presentation, and data verification and drawing conclusions, then the data was validated using the triangulation method. Based on the research that has been done, it can be interpreted that the results of the SPS analysis of Phase F.2 students of SMAN 1 Pulau Punjung on the observation indicator with a proportion of 89% and the experimental design indicator with a proportion of 82% both have very good categories. Then a classification indicator with a proportion of 77% and a predictive indicator with a proportion of 68% both have good categories. Then for the hypothesis delivery indicator with a percentage of 58% it is categorized as enough while for the hypothesis preparation indicator it has a proportion of 39% in the not enough category.
Student Perceptions of Science Subjects at State Vocational Schools in Central Lombok Regency
Authors: Azizi Asrorul , Jufri A. Wahab , Sarjan M. , Ariansani Yunita , Rokhmat Joni , Sukarso AA
Published: March 2024

Vocational High School (SMK) is an education that prepares students to become professionals according to their program of expertise. In addition to learning science in vocational education subjects, which is something new, the previous vocational subject curriculum did not study science. The purpose of this study was to describe students' perceptions of science learning at State Vocational High School (SMKN) 1 Praya, SMKN 1 Pujut , and SMKN 1 West Praya. This research includes descriptive research. The sample in this study was 20% of the tenth grade students of Paiwisata Vocational High School in Central Lombok district, totaling 37 students SMKN 1 Praya, 25 students of SMKN 1 Pujut, and 26 students of SMKN 1 West Praya . Sampling was done by simple random sampling, and the instrument used for data collection was a questionnaire. The data analysis technique used is percentage. Students' Perceptions of Research Results in Science Lessons show a percentage of 74.02% with sufficient criteria. It can be concluded that students' perceptions of learning science meet sufficient criteria.
Pengembangan VOLTA (Video Lagu Teori Kimia) pada Materi Teori Asam Basa dengan Strategi Chunking
Authors: Winel Khezya Merary , Rasmawan Rahmat , Ulfah Maria , Junanto Tulus , Harun Andi Ifriany
Published: March 2024

Pembelajaran kimia, yakni materi asam basa, dinilai sulit bagi siswa. Permasalahan ini ditemukan mengacu pada wawancara kepada guru dan siswa SMAN 2 Nanga Pinoh. Untuk mengatasi hal ini, media pembelajaran yang membantu siswa memahami dan mengingat materi, sesuai dengan karakteristik siswa sangatlah diperlukan. Tujuan penelitian ini yaitu untuk menghasilkan produk berupa VOLTA (Video Lagu Teori Kimia) pada Materi Teori Asam Basa dengan Strategi Chunking. Metode yang terapkan yakni penelitian dan pengembangan dengan model ADDIE yang terdiri dari tahap Analysis, Design, Development, Implementation, dan Evaluation. Penelitian ini hanya dilakukan hingga tahap Development. Video Lagu Teori Kimia pada materi Teori Asam Basa yang diujicobakan kepada siswa kelas XII SMA Negeri 2 Nanga Pinoh yang telah mempelajari materi teori asam basa merupakan subjek penelitian ini. Alat pengumpulan data berupa lembar penilaian kelayakan dan angket respon siswa. Penelitian ini menghasilkan media VOLTA (Video Lagu Teori Kimia) pada materi teori asam basa. Hasil validasi produk dari aspek materi dan media serta musik, masing-masing memperoleh skor 94,98% dan 96,08% sehingga sangat layak untuk digunakan. Hasil angket respon siswa pada uji respon awal dan utama mencapai rata-rata 89,09% dan 93,63% dengan kategori sangat baik. Disimpulkan bahwa VOLTA (Video Lagu Teori Kimia) pada materi teori asam basa dengan strategi chunking sangat layak digunakan sebagai media pembelajaran.
The Effect of Different Solvents on Total Tannin Content of Cengkodok (Melastoma malabathricum) Leaf Extracts
Authors: Masriani Masriani , Parawansa Khofifah Aditha , Sasri Risya , Sapar Ajuk , Erlina Erlina , Ersando Ersando
Published: March 2024

The use of synthetic dyes as color enhancers or generators has caused various environmental and health problems. Plant tannin biomordants offer an alternative solution to address these issues. The sample used in this study were Cengkodok (M. malabathricum) plants that grow wild in places that get enough sunlight such as shrubs. Phytochemical screening on various parts of the cengkodok plant revealed that the highest tannin content is found in the leaf. However, until now there has been no scientific evidence that presents differences in tannin levels in cengkodok leaf with various types of solvents. This study aims to determine the yield and total tannin content of cengkodok leaf extract obtained through maceration process using methanol, ethanol, and ethyl acetate solvents. The extract yield was determined by comparing the weight of the dry extract with the powdered cengkodok leaf material. The total tannin content was analyzed using UV-Vis spectroscopy at a wavelength of 755.8 nm with Folin-Ciocalteu reagent and sodium carbonate. Tannic acid was used as a reference. The research results showed that the yield values for Cengkodok leaf extracted with methanol, ethanol, and ethyl acetate were 5.05%, 4.72%, and 1.59%, respectively. The total tannin content of cengkodok leaf extracts with methanol, ethanol, and ethyl acetate solvents was 0.47%±0.04, 0.37%±0.01, and 0.19%±0.04, respectively. Based on this research, it can be concluded that methanol is the most effective solvent in extraction and determination of total tannin content of Cengkodok leaf extracts.
The Influence of Solution Concentration and pH for Removal Indigo Carmine using Banana Stem as a Biosorbent
Authors: Zein Rahmiana , Arianti Yuliana , Emriadi Emriadi , Ramadhani Putri , Fauzia Syiffa
Published: March 2024

The textile industry is one sector that generates effluent containing a significant quantity of pollutants, including dyes, and thus has an effect on the environment. Synthetic dyes, which are toxic and difficult to degrade, are utilized extensively in the textile industry. Therefore, a new study utilizes banana stems as a cost-effective biosorbent to remove indigo carmine dye. This research aims to investigate the use of banana stem waste as a bisorobent in batch method to adsorption indigo carmine dye. The optimal concentration and pH values are 2 and 900 mg/L, respectively. The interaction between the indigo carmine dye and the banana stems is suggested by the FTIR analysis.  The solution's indigo carmine dye may be adsorbed by banana stem.
Integrasi Mitigasi Bencana Global Warming pada Materi Pembakaran Hidrokarbon melalui Pendekatan RBL-STEAM
Authors: Shabrina Annida Nurul , Karyadi Bhakti
Published: March 2024

AbstractThe primary objective of this paper is to address the mitigation of disasters resulting from climate change and global warming. Such disasters are the result of increased greenhouse gas emissions, primarily caused by human activities like deforestation and the use of fossil fuels. To analyze the concept of hydrocarbon combustion from basic competencies (KD) 3.3 and 4.3 of chemistry class XI, we employed a qualitative descriptive method supported by a literature review. The paper investigates the relationship between climate change, the greenhouse effect, the carbon cycle, and their effects on the environment and health. Furthermore, it proposes a learning design that combines the Research-Based Learning (RBL) model with the STEAM approach to enhance students' comprehension of climate change, the consequences of hydrocarbon combustion, and emergency response measures. One of the highlighted learning strategies is the creation of an interactive and engaging mini park mockup to facilitate student understanding. The use of technology, specifically machine learning, is recommended for decision making in global warming disaster mitigation. This paper stresses the significance of integrating chemistry learning for knowledge and skills development in KD 3.3 and 4.3, and for understanding global warming and disaster mitigation efforts. The goal is to provide students with science literacy skills as well as the ability to identify concrete actions in reducing the negative impacts of climate change.
Development of Chemistry Learning Media based on Joyful Learning with Snakes and Ladders Game on Stoichiometry material to Improve Student Learning Outcomes
Authors: Janah Miftakhul , Mitarlis Mitarlis
Published: March 2024

This research aims to obtain chemistry learning media based on joyful learning with the snakes and ladders game on stoichiometric material that is suitable for use to improve student learning outcomes based on the validity, practicality and effectiveness of the game. The research method used is the research development (R&D) method with the 4D model by Tigharajan which consists of 4 main stages, define, design, develop and disseminate. However, the development of Joyful Learing-based Chemistry Learning Media with the Snakes and Ladders game has only reached the development stage. The research was carried out at Surabaya State University and SMA Negeri 1 Menganti Gresik. Test the game media using the One Group Pretest-Posttest Design system. Validity is obtained from the assessment of the stoichiometric snake and ladder game media by the validator. Practicality is obtained from the results of observing student activities, observing the implementation of learning activities, and student response questionnaires. Effectiveness is obtained from student learning outcomes. The results of the research show that chemistry learning media based on joyful learning with the snakes and ladders game on stoichiometric material is suitable for improving student learning outcomes with a feasibility score of ≥ 4 in the feasible to very feasible category. The practicality of chemistry learning media based on joyful learning with the snakes and ladders game on stoichiometric material to improve student learning outcomes is said to be suitable for use in terms of the results of observations of student activities which obtained a percentage of 96.81%, the results of observations of learning implementation obtained a percentage of 93.98%, and Student responses obtained a percentage of 91.52%. Then, the effectiveness of chemistry learning media based on joyful learning with the snakes and ladders game on stoichiometry material to improve student learning outcomes which was developed in terms of pretest and posttest scores was declared effective. This is shown by the N-gain score of all students being in the medium to high category and meeting the KKM value, with an average N-gain value of 0.79 with high criteria. This shows that the stoichiometric snakes and ladders game is declared suitable for use as a chemistry learning medium based on joyful learning on stoichiometric material to improve student learning outcomes.