JCER (Journal of Chemistry Education Research)

DEVELOPMENT OF A PERIODIC ELEMENTARY SYSTEM MODULE FOR BOARDING SCHOOL STUDENTS IN IMPROVING VISUAL INTELLIGENCE

Anggia Ulfia Khusna, Shafna Nor Janah, Adam Al Halwi, Kusumawati Dwiningsih — Fri, 14 Jun 2024 00:00:00 +0700

The periodic system of elements is one of the complex chemical materials. The results of previous research show that the learning achievement of boarding high school students has an understanding that is only limited to the macroscopic level. Visualization of chemical representation level requires high visual intelligence. Therefore, researchers developed a module of periodic system of elements as an independent learning media for high school boarding school students in improving visual intelligence. This study aims to analyze the validity, practicality, and effectiveness of the module. The type of research used is the ADDIE method with five stages, namely Analyze (analysis), Design (design), Develop (development), Implement (implementation), and Evaluate (evaluation). The module in terms of content and construction showed a very valid category. The results of observations of module implementation show a very practical category. The module is very effective to improve students' visual intelligence with an n-gain value of 0.753434. The results showed that the periodic system of elements module is feasible to use as a solution to improve students' visual intelligence.

DEVELOPMENT OF POGIL-BASED E-WORKSHEET ON COVALENT BOND MATERIALS TO IMPROVE STUDENTS' LEARNING INDEPENDENCE

Fri, 14 Jun 2024 00:00:00 +0700

This research aims to create POGIL-based E-Worksheet learning media on Covalent Bond material to increase students' learning independence. This research uses R&D (Research and Development) research to produce and test the effectiveness of media by adapting the model developed by Plomp (2010). The subjects of this research were class XI students of SMAN 1 Menganti. The validity results based on assessments from experts were found to be 85.7% for content validity which was included in the very valid criteria and 90.7% for construct validity which was included in the very valid criteria. This E- Worksheet is also considered practical in terms of the student response questionnaire with a score of 77.3% or in the very practical category and the results of observations of student activities obtained a score of 88.9% or in the very practical category. Furthermore, the effectiveness results based on the learning independence questionnaire obtained an n-gain score of 0.71 or in the high category. Based on these results, this E- Worksheet can be used as a learning medium to increase students' learning independence.

VALIDITY OF ASSESSMENT SHEETS FOR IDENTIFYING CONCEPTIONS AND ARGUMENTATION SKILLS IN CHEMICAL EQUILIBRIUM MATERIALS

Fri, 14 Jun 2024 00:00:00 +0700

This research aims to determine the validity of the conceptual identification assessment sheet and argumentation skills on chemical equilibrium material. This research uses the Research and Development type of research. The development model uses the ADDIE model by applying the Analyze, Design and Develop stages. The research subject is SMAN 16 Surabaya. Later, this research will use qualitative and quantitative data analysis. The validation results of the product validity assessment show that the data on the material aspect is in the very good category which is get mode score 4, the construct aspect is in the good category which is get mode score 3, and the language aspect is in the good category which is get mode score 4. The results of the teacher's response to the assessment instruments developed are good and can be used.

Development of Augmented Reality-Assisted Interactive Student’s Worksheet on The Topic of Molecular Shape

Johnsen Harta, Filmonia Greslita Bili — Mon, 18 Dec 2023 00:00:00 +0700

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.

Analysis of Concepts and Propositions through Multi-Representation Based Inquiry Learning on Colligative Properties

Fri, 14 Jun 2024 00:00:00 +0700

Chemistry is a science that studies the composition, structure, and properties or changes of matter. In chemistry, there are three levels of representation namely macroscopic, submicroscopic, and symbolic. Chemistry is a branch of science that requires students to have an understanding of concepts and mathematical skills, one of which is colligative properties. The aim of this research is to analyze the concept of colligative properties so that students don’t have misconceptions and can enhance their understanding through a multi-representation approach. The method used is the scientific approach, based on a series of five main learning experiences: Observing, Questioning, Reasoning, Associating and Communicating. Information collection techniques include concept maps, concept analysis, and propositions. Colligative properties consist of vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure. The van't Hoff factor is present in most colligative properties where the solute is an electrolyte substance.