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All Journal Jurnal Tadris Kimiya J-PEK (JURNAL PEMBELAJARAN KIMIA) Unnes Science Education Journal JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Riset Pendidikan Kimia (JRPK) JCER (Journal of Chemistry Education Research) Abdimas Altruis: Jurnal Pengabdian Kepada Masyarakat
Johnsen Harta
Program Studi Pendidikan Kimia, Fakultas Keguruan Dan Ilmu Pendidikan, Universitas Sanata Dharma
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Social Sciences Other

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ANALYSIS STUDENTS’ SCIENCE PROCESS SKILLS IN SENIOR HIGH SCHOOL PRACTICUM BASED ON SMALL SCALE CHEMISTRY (SSC) Harta, Johnsen; Pamenang, Fransisca Ditawati Nur; Listyarini, Risnita Vicky; Wijayanti, Lucia Wiwid; Hapsari, Natalia Diyah; Ratri, Monica Cahyaning; Asy'ari, Maslichah; Lee, Wonkoo
Unnes Science Education Journal Vol 8 No 3 (2019): December 2019
Publisher : Department of Integrated Science, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang in Collaboration with Perkumpulan Pendidikan IPA Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/usej.v8i3.31857

Abstract

Experiment is integral part of chemistry. Through experiments, everyone can verify and or find something new as an alternative solution to attract interest in meaningful chemistry learning. Innovative experimental packaging can be done with Small Scale Chemistry (SSC) to establish the importance of understanding and application related to the use of small amounts of reagents and reduce waste produced during chemistry practicum. This study aims to explore and analyze the science process skills of the second semester students of Chemistry Education Study Program, Sanata Dharma University, which focused for chemistry grade 12 in water electrolysis using straws and mini test tubes as physical chemistry’s experiment and formation reaction of silver mirror uses vial bottle and mirror media as experiment of organic chemistry. The results show that students’ science process skills which includes observation skills with good average score, prediction skills with good enough average score, skills in interpreting data with good average scores, and communication skills with good average score for two kind of experiments conducted. In general, students were enthusiastic in carrying out the two SSC experiments. The students also evaluate the experiments to be able to help develop and improve their soft skills in chemistry learning. Keywords: science process skills, senior high school practicum, small scale chemistry
Development of Inorganic Molecular Shape Model Using 3D Printer to Strengthen Student's Conceptual Understanding Rizal Galih Pratama; Johnsen Harta
Jurnal Tadris Kimiya Vol 6, No 2 (2021)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v6i2.12988

Abstract

This research aims to develop a product in the form of an inorganic molecular shape model using a 3D printer, analyze the validity, practicality, effectiveness of the product, and strengthen students' conceptual understanding using the product. The method is Research and Development (R&D) based on the Analysis, Design, Development, Implementation and Evaluation (ADDIE) model. The supporting instruments for this research are product and instrument validation sheets, product readability questionnaires, pretest-posttest questions, question during the trial, observation sheets for students' conceptual understanding, and student response questionnaire to the product. The results showed that the product developed was following the ADDIE model because the five stages were carried out systematically; the product being developed has very high validity with an average percentage of 96.88%; the average percentage of practicality is 95.17%  which is categorized as very practical, and the average percentage of effectiveness is 94.69% which is categorized as very effective; the product developed can strengthen students' conceptual understanding shown on the average percentage of conceptual understanding indicators achievement during the trial was 90.61% and the observation result was 94.69%, both of which belong to very high category. There was an increase in the average pretest value of 33.93 and post-test of 63.99. The results of the Rasch analysis after using this product showed that the consistency of students' answers was 0.71 (quite good), the quality of the items was 0.93 (very good), and the interaction between the consistency of students' answers was 0.68 (quite good). The product can be used to strengthen students' conceptual understanding on the topic of molecular shape.
PENGEMBANGAN MEDIA PEMBELAJARAN ASAM BASA INOVATIF BERBASIS GREEN LABYRINTH UNTUK SMA Johnsen Harta; Stella Afrilita Limbong; Ester Elinawati Waruwu
J-PEK (Jurnal Pembelajaran Kimia) Vol 5, No 1 (2020): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um026v5i12020p017

Abstract

Media pembelajaran merupakan salah satu bagian yang esensial dalam menunjang keberhasilan proses belajar mengajar. Kebermaknaan suatu pembelajaran dapat ditingkatkan menggunakan media pembelajaran yang inovatif dan menyenangkan. Selama ini, pembelajaran eksperimen asam basa di SMA selalu identik dengan reagen kimia dan kurang meminimalisir limbah, sehingga perlu terobosan produk berupa media pembelajaran berbasis Green Labyrinth dari limbah sayur dan buah lokal yang sangat potensial dan eco-friendly. Penelitian ini bertujuan untuk menghasilkan, menganalisis kualitas, dan menyelidiki efektivitas penggunaan produk untuk SMA. Pengembangan produk mengacu pada model pengembangan 4-D yang dimodifikasi dengan menganalisis kebutuhan media pembelajaran asam basa di kelas XI SMA, merancang konsep dan penggunaan media, mengembangkan media, melakukan validasi dan penilaian dari ahli, guru kimia, dan peer reviewer, dan uji coba skala kecil dengan mahasiswa dan siswa SMA. Data kuantitatif dan kualitatif dianalisis dengan model Rasch dan deskriptif. Hasil penelitian menunjukkan bahwa produk yang dikembangkan telah memenuhi kriteria valid dengan rata-rata koefisien validitas 0,85, reliabel dengan nilai Cronbach Alpha 0,78, respon sangat baik dari mahasiswa dan siswa SMA terhadap produk, efektif, dan praktis sebagai media pembelajaran dan permainan edukatif untuk SMA. 
Developing Small Scale Chemistry Practicum Module to Identify Students’ Ability in Predict-Observe- Explain (POE) Implementation Johnsen Harta; Risnita Vicky Listyarini; Fransisca Ditawati Nur Pamenang; Lucia Wiwid Wijayanti; Wonkoo Lee
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 1 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (906.671 KB) | DOI: 10.20961/jkpk.v5i1.38537

Abstract

Chemistry practicum does not have to be complicated and requires expensive apparatus and chemicals, and is considered not environmentally friendly. The concept of small scale chemistry practicum is one of appropriate technology that is packaged elegantly to introduce and embed the principles of green chemistry in every chemistry experiments, and also to enhance the concepts of chemistry through verification and scientific discovery. This study aims to create the newest product, the small scale chemistry practicum module to identify the ability of the students of chemistry education study program, Sanata Dharma University, Yogyakarta in formulating predictions on phenomenon based on the insights they have, making direct observations through small scale chemistry practicum, and explaining the results of observations and emphasis on concepts in detail and depth. This research is the development research with the model of Analysis, Design, Develop, Implement, and Evaluate (ADDIE). Data were analyzed by descriptive analysis and Rasch Model. The results of the study show that the product developed has a perfect and feasible level of readability to be tested. From the content aspect, it presented in perfect criteria, as well as the construction aspect and aspect of language, also shows good value. The students already have quite an excellent ability to predict (average score= 76), observe (average score= 88.5), and explain (average score 87.5). Also, it was noted that students enthusiastically applied POE, and the results of POE students show good person reliability value (0.88) in small scale chemistry experiments. The product developed has been valid, effective, and practical for use in experiments according to experts and teachers, and good student responses (Cronbach's alpha value= 0.92) to the product.
DEVELOPMENT OF ASSEMBLR EDU-ASSISTED AUGMENTED REALITY LEARNING MEDIA ON THE TOPIC OF EFFECT OF REACTANT’S CONCENTRATION AND CATALYST ON REACTION RATE: PENGEMBANGAN MEDIA PEMBELAJARAN AUGMENTED REALITY BERBANTUAN ASSEMBLR EDU PADA SUBTOPIK PENGARUH KONSENTRASI REAKTAN DAN KATALIS TERHADAP LAJU REAKSI Laurensia Octaviani; Johnsen Harta; Gevin Yeri Winarta
JCER (Journal of Chemistry Education Research) Vol. 6 No. 1 (2022): Volume 6 No. 1 June 2022
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v6n1.p58-71

Abstract

The level of submicroscopic representation can be cause of difficulty in learning chemistry, so that interest and understanding of chemistry concept is low. In overcoming this, innovative learning media are needed that are able to visualize and make it easier to understand abstract concepts, especially on the subtopic of the effect of reactant’s concentration and catalyst on the chemical rate reactions. This research aims to create product in the form of Augmented Reality assisted by Assemblr Edu that is valid, effective, and practical. This study is Research and Development that uses ADDIE development model and involves 10 prospective chemistry teacher students. Research instruments include validation sheets, test items, and response questionnaire. Data were analyzed using Aiken's V and descriptive statistic. The results showed that: (1) product have fulfilled very valid criteria with average percentage of 92% with aspect of product presentation and use are 92% (very valid), content aspect of 94% (very valid); language aspect by 92% (very valid); (2)average test score of respondents after using the product is 70 which indicates that product is classified as effective; and (3)average response to the product is 90% indicating that the product is very good and classified as very practical. The product is feasible to use and can support the mastery of technology-based concept, especially in the subtopic of the effect of reactant’s concentration and catalyst on chemical rate reactions.
DEVELOPMENT OF ASSEMBLR EDU-ASSISTED AUGMENTED REALITY LEARNING MEDIA ON THE TOPIC OF EFFECT OF SURFACE AREA AND TEMPERATURE ON REACTION RATE Briel Batis Tuta; Johnsen Harta; Sarah Sani Purwasih
JCER (Journal of Chemistry Education Research) Vol. 6 No. 1 (2022): Volume 6 No. 1 June 2022
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v6n1.p44-57

Abstract

Understanding concepts at the submicroscopic and symbolic levels becomes challenge in studying subtopics of the effect of surface area and temperature because some parts are still abstract and difficult to understand. Creative and innovative learning media are needed to help learn concepts through visualization. This research aims to create product in the form of Augmented Reality assisted by Assemblr Edu that is valid, effective, and practical. This study is development research that adopts the modified Borg & Gall development model. The research subjects were 12 students of pre-service chemistry teachers. The research supporting instruments were validation sheets, test items, and response questionnaires. Data were analyzed using descriptive statistics and Aiken's V. The results showed that: (1) product fulfilled very valid criteria with average percentage of 91% with the results from the presentation and product use aspects of 90% (very valid), content aspect of 92% (very valid); language aspect by 92% (very valid); (2) the average test score of respondents after the trial is 75 which indicates that the results are good and the product is classified as effective; and (3) the average response to the product is 89% indicating that the product is very good and very practical for further use. This digital product is feasible to use and is recommended to support the understanding of the subtopic of the effect of surface area and temperature on the rate of chemical reactions.
PELATIHAN PRAKTIKUM KIMIA SKALA KECIL ELEKTROLISIS AIR UNTUK GURU KIMIA DI WAE NAKENG, LEMBOR, NUSA TENGGARA TIMUR Pamenang, Fransisca Ditawati Nur; Harta, Johnsen; Ratri, Monica Cahyaning; Wijayanti, Lucia Wiwid; Octaviani, Laurensia; Anggreni, Viktoria Cosinta; Surianti, Yosefina Ermi
ABDIMAS ALTRUIS: Jurnal Pengabdian Kepada Masyarakat Vol 6, No 2 (2023): Oktober 2023
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/aa.v6i2.5520

Abstract

Practicum is an activity that cannot be separated from chemical learning. Chemistry learning can be more meaningful through attractive practicum activities. One obstacle that arises in the implementation of the practicum is the availability of adequate practicum materials and tools. Small-scale chemistry practicum can overcome this obstacle, which is in the form of the use of materials that are environmentally friendly and available in the surrounding environment, as well as simple practicum tools that can be used. One of the small-scale chemistry practicums trained is the water electrolysis practicum. Simple practicum using sodium sulfate and water, able to explain the electrolysis of water well. Through this small-scale chemistry practicum training, teachers are expected to have the skills to carry out simple practicums and develop other practicum topics while still paying attention to the scientific field. Through this small-scale-based chemical practicum training, there is an increase in the mastery of the concept shown by an increase in the average score from 30.67 to 73.33. The teachers give a positive response regarding the implementation of this training activity.
Development of Augmented Reality-Assisted Interactive Student’s Worksheet on The Topic of Molecular Shape Harta, Johnsen; Bili, Filmonia Greslita
JCER (Journal of Chemistry Education Research) Vol. 7 No. 2 (2023): Volume 7 No. 2 December 2023
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v7n2.p267-276

Abstract

Chemistry learning at SMA Negeri 1 Kalasan still uses conventional teaching materials. Teachers have never developed and used interactive LKPD. Molecular shape is one of the topics that is considered difficult, abstract, and challenging, so teaching materials are needed that can visualize the concept well, one of them through using Augmented Reality technology. This research aims to: (1) create product that fulfill the development feasibility criteria; and (2) find put the response of students to the product during trial. This study is Research and Development (R&D) that refers to the 3D development model, namely Define, Design, and Develop. The instruments used in this study were interview sheet, survey questionnaire, validation sheets, questions item in the product, and questionnaire for students' response to the product. A number of 10 students of X MIPA class were selected through purposive sampling technique as research sample. The research data obtained were analyzed descriptively. The results showed that: (1) product has fulfilled the criteria of being very feasible and very valid with average percentage of 87%, very effective with average score of 99 that also supported by the acquisition of average percentage of completeness of working on questions of 97%, very practical with average percentage of 93%; and (2) students' response to the product is very good. The average percentage of student’s responses per aspect item in the questionnaire was 92.81%. About 70% students stated that product is interesting and easy to understand.
Analisis Keterampilan Metakognitif Mahasiswa dalam Mengkaji Implementasi Kurikulum Kimia di SMA melalui Project Based Learning Harta, Johnsen
Jurnal Riset Pendidikan Kimia (JRPK) Vol. 9 No. 2 (2019): Jurnal Riset Pendidikan Kimia (JRPK), Volume 9 Nomor 2 (2019)
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.93 KB) | DOI: 10.21009/JRPK.092.06

Abstract

The existence of the curriculum not only emphasizes the importance of attention to education, but also our efforts to explore and interpret the vital role of curriculum that will bring Indonesian education to international level. Especially in chemistry learning, prioritizing the structure and implementation of the right curriculum is an essential part of introducing and reviving the role of meaningful chemical learning. This study aims to investigate the metacognitive aspects of students in reviewing the implementation of senior high school in Yogyakarta. This research is a quantitative-qualitative descriptive study with 3 project based learning. The research was conducted from August to December 2018. The research instruments used were interview sheets, test questions according to metacognitive level indicators, questionnaires in the form of Metacognitive Awareness Inventory (MAI), presentation-discussion assessment sheets, and reflection sheets. Data collection techniques include descriptive analysis of the results of metacognitive level tests, MAI questionnaire analysis using Rasch Model, analysis of interviews, observation, and reflection descriptively. The results show that students were good at analyzing curriculum structure and studying the implementation of high school and vocational chemistry curriculums in Yogyakarta with the acquisition of an average score of 82.65 for curriculum comprehension, component surgery and high school chemistry content in the curriculum having an average score of 89.57. Regarding the final value of the group project, the average value of the ability and analysis aspects in the chemistry teachers interview is 87.11; the average value for presentation design is 91.51; and the average value of presentation and discussion skills is 83.14. In the metacognitive test, 87.5% and 97.14% of students were completed and supported by Cronbach's Alpha Value of 0.94 for the results of the MAI questionnaire analysis using the Rasch Model. The five metacognitive levels have been achieved well. Keywords Project based Learning, Metacognitive Skills, Curriculum Implementation, Chemistry at Senior High School
PELATIHAN PRAKTIKUM KIMIA SKALA KECIL: PEMBUATAN INDIKATOR ASAM BASA BERUPA BOLA ALGINAT UNGU UNTUK GURU-GURU KIMIA DI SMA SANTA FAMILIA Harta, Johnsen; Nur Pamenang, Fransisca Ditawati; Wijayanti, Lucia Wiwid; Ratri, Monica Cahyaning; Anggreni, Viktoria Cosinta; Surianti, Yosefina Ermi; Octaviani, Laurensia
ABDIMAS ALTRUIS: Jurnal Pengabdian Kepada Masyarakat Vol 6, No 1 (2023): April 2023
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/aa.v6i1.5490

Abstract

The practicum management of chemistry teachers at senior high school on the topic of acid-base is quite good, although the majority are monotonous in testing acid-base properties using large amounts of solution. Some schools only limit the practical use of extracts from various flowers with certain color pigments, then tested on several samples and used as natural indicators, but have not paid attention to the number of reagents and estimated waste generated. The purpose of this activity is to improve the quality of classical practicum and the attractiveness of acid-base indicators from materials that refer to the principles of green chemistry. Service activities are carried out in training through the practicum method of making acid-base indicators using purple cabbage extract, sodium alginate, and 1% CaCl2 solution. This training provides a new and innovative description of the formation of purple cabbage extract gel as an acid-base indicator in the form of red balls under acidic conditions and green under alkaline conditions. Chemistry teachers were very happy and felt that this practicum was simple and interesting to be packaged and brought to the routine practicum conducted at schools.
Co-Authors Anggreni, Viktoria Cosinta Asy'ari, Maslichah Bili, Filmonia Greslita Briel Batis Tuta Ester Elinawati Waruwu Fransisca Ditawati Nur Pamenang Gevin Yeri Winarta Laurensia Octaviani Lee, Wonkoo Lucia Wiwid Wijayanti Monica Cahyaning Ratri Natalia Diyah Hapsari Nur Pamenang, Fransisca Ditawati Octaviani, Laurensia Risnita Vicky Listyarini Rizal Galih Pratama Sarah Sani Purwasih Stella Afrilita Limbong Surianti, Yosefina Ermi Wonkoo Lee