THE EFFECTIVENESS OF PROBLEM BASED LEARNING MODEL BASED ON ETHNOSCIENCE ON STUDENT’S CRITICAL THINKING SKILLS

The purpose of this study was to determine the effectiveness of the problem-based learning model based on ethnoscience on students' critical thinking skills on colloidal material. Experiments were conducted on a sample of 36 experimental class students with an ethnoscience-based problem-based learning model and 36 experimental class students with a convention learning model. This research method is a quasi-experimental design with a nonequivalent control group design. The instruments used are essay tests and observation sheets. The results of this study indicate that the average posttest in the experimental class is 76.08, which is higher than the control class, which is 69.33. These results indicate that the use of ethnoscience-based learning problem-based learning models on colloidal material is effective in improving students' critical thinking skills compared to using conventional models.

The effect of colloids practicum e-module to improve students’ interest on virtual lab during the covid-19 pandemic

Practical learning which is generally carried out in the laboratory is one of the important lessons in the science learning process, especially chemistry. The Covid-19 pandemic has caused practical learning activities to not be accommodated in real laboratories. This situation encourages the creation of practical learning innovations, namely the use of virtual labs. In this study, students' learning interest in the use of virtual labs is described which is integrated with the use of e-modules on colloidal material. Based on the results of data analysis, 74.55% of students were interested in using the virtual lab, 10.90% very interested, 12.73% quite interested, and 1.82% lack of interested. These data indicate that the majority of students can make good use of the virtual lab and are able to optimally elaborate on the learning process. However, virtual labs are not intended to replace real laboratories but can be used as supplements and media to support learning in real laboratories.

The development of flashcard learning media based on make a match on colloid

This study aimed to determined the feasibility of the Make a Match-Based Flashcard learning media on colloidal material. The subjects of this study were the students of the State Senior High School 1 Muara Batu and the Private High School Jabalnur as many as 25 students. This study refers to the type of Research and Development (R&D) with a 4D model. This research was carried out until the limited trial stage. The stages carried out in this research are Define, Design, Develop. In the Define stage, concept analysis is carried out, at the design stage, the design of learning media to be developed is carried out, at the Develop stage the development of Make a Match-Based Flashcard media is carried out and limited trials on research subjects. The results showed that the Make a Match-Based Flashcard media was valid with a media validity percentage of 88% (very good), and material validity of 85% (very good). The results of data analysis showed the feasibility with a percentage value of 92.30% (very feasible). Based on the results of the study conducted, it can be concluded that the Make a Match-Based Flashcard media is very suitable to be used as a learning medium on colloidal material.

Research on the Damping Performance of Mining Highly Efficient Water-Retaining Colloidal Material Against the Spontaneous Combustion of Coal

In order to solve the shortcomings of the traditional mining anti-extinguishing gel material such as low strength and poor water retention, a high hydrocolloid anti-extinguishing material was developed with sodium alginate and light calcium carbonate as the base material and gluconolactone as the retarder, which was mixed and reacted. The base material ratio of highly efficient water-retaining colloidal material for coal void filling was determined as 2% SA + 0.5% PCC + 1% GDL with a moulding time of 4.5 min, while the base material ratio of highly efficient water-retaining colloidal material for extinguishing high temperature fires was 2.5% SA + 1% PCC + 1% GDL with a moulding time of 2.5 min. The highly efficient water-retaining colloidal material was found to reduce the concentration of signature gas and delay the characteristic temperature point and increase the activation energy of coal oxidation, which indicates that the highly efficient water-retaining colloidal material can effectively inhibit the spontaneous combustion process of coal at low temperature stage. Infrared spectroscopy experiments were conducted to investigate the microscopic resistance mechanism of the highly efficient water-retaining colloidal material, and the results showed that the highly efficient water-retaining colloidal material mainly reduce the activity of Ar-C-O-, -COO-, -CH3, -CH2 and -OH in coal to inhibit the spontaneous combustion of coal.

Concept Understanding Analysis of Coloid Materials After Application of Joyful Learning Problem Based Learning

Learning without strengthening understanding of concepts can cause misconceptions and learning to be less meaningful. This study aims to analyze students' understanding of the concept of colloidal material. The research design uses quantitative descriptive methods. The research subjects were students of class XI MIPA Islamic High School Plus Bina Insani Susukan 2018/2019 academic year. Data collection using three tier multiple choice tests. The results of data analysis showed 43% of students understood the concept, 39% of students experienced misconceptions and 15% of students in the category of lack of understanding and 3% of students guessed the answers. The highest percentage of indicators shows interpreting the data and giving examples of colloidal material. This shows that most of the students were able to interpret the data and set examples well. Problem-based learning with a joyful learning approach is enough to help students in understanding students' concepts.

Gels in Medicine and Surgery: Current Trends and Future Perspectives

Gel is a two-phase elastic colloidal material, consisting of a dispersed liquid incorporated in the solid phase [...]

Intuitive Thinking Ability of Students of Grade XI Science at SMA Negeri 4 Palu through the Implementation of Discovery Learning Model on Colloidal Material

This study aimed to describe the intuitive thinking ability in Grade XI SMA Negeri 4 Palu through the implementation of discovery learning model on Colloidal material. This study was a One-Shot Case Study design. The population of this study was all students of grade XI Science at SMA Negeri 4 Palu, and the sample was Class XI Science 3 as the replication class 1 and class XI Science 6 as the replication class 2. The results obtain the intuitive thinking ability of replication class 1 is that the students who solved the problem with a reasonable answer, that is 86.43% in the very high category. Students who solved problems using prior knowledge and experience, that is equal to 77.14% in the high category, and students who solved problems based on generalization of examples or concepts, that is 84.46% in the very high category. While the intuitive thinking ability of replication class 2 is that the students who solved problems with a reasonable answer is 52.85%, in the medium category. Students who solved problems using prior knowledge and experience, that is equal to 76.42% included in the high category, and students who solved problems based on generalization of examples or concepts that is equal to 83.92% in the very high category.

Sparkol Videoscribe Usage on Colloid Material as a Media for Chemistry Education

This research method was research and development (R & D), which purposed to obtain the sparkol videoscribe designs of colloidal material and the validity of designs that were reviewed by experts as theoretical experts. The object of this study was sparkol videoscribe. Data collection was divided into two, namely media design data and media validity that were designed by using assessment sheets from 5 experts, 3 people were the learning media experts and 2 people were the chemical material experts. Data were analyzed descriptively to determine the justification of the validity of the research object. The results of the data analysis obtained that sparkol videoscribe design of material colloid had characteristics, namely images, moving hand animation, music, explanation of material in the form of sound and the composition of sentences incorporated in whiteboard animation. The designs were declared valid with a very good category according to experts and can be used as a chemistry education media with a score of 3.7 based on the total score of the instructional media experts and 3.45 based on the total score of the chemical material experts.

MODEL PROJECT BASED LEARNING BERBANTUAN MEDIA “CHEMONDRO”, MOTIVASI, DAN HASIL BELAJAR

This study aims to determine whether there are significant differences in learning motivation and learning outcomes in students between the use of PjBL learning models assisted by Chemondro android-based chemistry learning media with expository learning models. In addition, it is aimed to determine students' responses to Chemondro media on colloidal material. Classes becaming the sample were class X-TKJ A and X-TKJ B at SMK Negeri 2 Banjarmasin. The method used is a quasi-experimental with descriptive and inferential analysis techniques. This research shows that there are significant differences in motivation and student learning outcomes in classes using the PjBL model compared to the expository model. The use of Chemondro media for colloidal material perceived positive responses from students. Keywords: Project Based Learning (PjBL), Chemondro, motivation to learn, learning outcomes, Colloid Abstrak. Penelitian ini bertujuan untuk mengetahui apakah terdapat perbedaan motivasi belajar dan hasil belajar yang signifikan pada peserta didik antara penggunaan model pembelajaraan PjBL berbantuan media pembelajaran kimia berbasis android Chemondro dengan model pembelajaran ekspositori. Selain itu, untuk mengetahui respon peserta didik terhadap media Chemondro pada materi koloid. Kelas yang menjadi sampel penelitian adalah kelas X-TKJ A dan X-TKJ B di SMK Negeri 2 Banjarmasin. Metode yang digunakan adalah quasi-experiment dengan teknik analisis deskriptif dan inferensial. Penelitiian ini menunujukkan adanya perbedaan motivasi dan hasil belajar peserta didik yang signifikan pada kelas yang menggunakan model PjBL dibandingkan dengan model ekspositori. Penggunaan media Chemondro materi koloid mendapat respon positif dari peserta didik. Kata kunci: Project Based Learning (PjBL), Chemondro, motivasi belajar, hasil belajar, Koloid