Development of problem-based science practicum instructions of Junior High School Students

This study aims to develop problem-based science practicum instructions intended for grade VIII junior high school / MTs students in the odd semester. The problem-based approach was chosen because it has been proven effective in improving students' critical thinking and problem solving skills. This research uses the 4D method which includes the Define, Design, Develop and Dissaminate stages. The results of this study indicate that the problem-based practicum instructions developed are valid, practical and effective. The validity value is 4.2 which means that the problem-based practicum instructions are included in the valid criteria. The practicality value is 4.6 which means that the problem-based practicum instructions are classified as practical criteria. The problem-based practicum instructions developed have also been classified as effective by looking at the results of positive responses from students which reached 84.8%. The final product resulting from this research is expected to be a reference for teachers in teaching science with a problem-based approach, so as to improve the quality of science learning in schools. Keywords: practical guidelines, science learning, junior high student

Critical Thinking Ability Based on Student Gender in Biology Learning at SMA Negeri 4 Pekanbaru

One of the goals of 21st Century education is to develop students' thinking skills, one of which is critical thinking skills. The diversity of student problems in schools is one of the topics of discussion and research in the world of education. One of the main learning processes is student differences, especially gender differences. The influence of gender or gender differences on various student abilities has been revealed in previous research. This research was conducted at SMA Negeri 4 Pekanbaru. The population in this study were students of class XI MIPA. The research method used is descriptive method, which is a research method used to describe problems that occur at the present time or are ongoing, aiming to describe what happened as it should have been when the research was conducted. According to the graphic data above, the highest score interpretation is found in female students, namely the range of values 79-65 in the moderate category and the number of female students who get this range of values is 10 out of 19 people. Meanwhile, only 8 out of 17 male students obtained a score range of 65-79. Based on the results of the research that has been carried out and the discussion that has been presented, it can be concluded that there are gender differences, female students get a percentage of 26.7% with 3 indicators of critical thinking skills while male students get a percentage of 14.5% with 2 indicators of critical thinking skills. So the percentage of female students has a higher critical thinking ability than male students.Keywords: critical thinking ability, gender, learner

Identification of Microflora Diversity and Its Influence on the Organoleptic Quality of the Traditional Dayak Food Tempoyak in Central Kalimantan

Tempoyak is a traditional fermented food of the Dayak ethnic group in Central Kalimantan. The production of tempoyak remains highly traditional and lacks innovation. Research on tempoyak is still limited, resulting in a lack of documentation of this food as part of Indonesia’s local wisdom and cultural heritage. Therefore, exploring preferences and the appeal of tempoyak’s organoleptic qualities among the millennial generation is essential. This study employed a one-shot case study design. The variables examined include the diversity of microflora in tempoyak and its effect on organoleptic quality and the level of preference among millennials. Isolate identification was conducted using API-50CHL, biochemical tests, and physiological tests. Organoleptic quality was assessed using a hedonic scale. A total of 120 panelists participated in the study, consisting of individuals from Dayak, Madurese, Javanese, and Banjar ethnic groups. Data were analyzed using one-way ANOVA. The study identified 15 microflora isolates in tempoyak that influence its taste and organoleptic properties, including 8 lactic acid bacteria isolates: Pediococcus acidilactici, Lactobacillus curvatus, Leuconostoc mesenteroides, Lactobacillus plantarum, Streptococcus thermophilus, Lactobacillus pentosus, Enterococcus faecium, and Weissella paramesenteroides; 1 non-lactic acid bacterium isolate (Micrococcus varians); 2 yeast isolates (Saccharomyces cerevisiae and Kluyveromyces marxianus); and 4 mold isolates, including Rhizopus, Monilia sitophila, and Mucor roxii. All identified microflora could produce lactic acid, except Aspergillus repens. Statistical analysis showed a significant effect on all sub-variables of organoleptic quality—color, taste, aroma, and texture of Tempoyak. These findings suggest a preference for the color and texture, and a liking for the taste and aroma of Tempoyak. The study indicates potential for Tempoyak to be further developed in a more innovative and contemporary manner, making it more appealing to the millennial generation.Keywords: tempoyak, organoleptic, microflora, Daya

Analysis of Learning Style Characteristics of Class X2 Students in Biology Subject at SMA Negeri 2 Sukoharjo

Student has different characteristics in receiving an education and teaching, including different learning styles. Learning styles owned by students affect the achievement of learning objectives. A teacher needs to understand the learning styles of students in order to create effective learning. The purpose of this study was to determine the learning styles of students. The subjects of this research were X grade students of senior high school Sukoharjo. The research method used in this research is descriptive qualitative. Data collection in this study was carried out using observation instruments and questionnaires about learning styles. Observations were made and the learning style questionnaire was filled in by 33 class X students. The data from observations and filling out the questionnaire were analyzed using the percentage method and then described. The results of the analysis of learning styles show that there are 3 types of learning styles in class X2, namely visual, auditory and kinesthetic learning styles. The tendency of the learning style of class X2 students is kinesthetic learning style with a percentage of 61%.Keywords: learning styles, visual, auditory, kinestheti

CAS-Plan: Civitas Academic of School - Differentiated Learning to Optimize Science Learning Oriented to Increasing Scientific Literacy in Class VII-B of SMP IT Ar Raihan Bandar Lampung

This research aims to determine the effectiveness of using CAS-Plan to improve students' scientific literacy skills in science learning. This Classroom Action Research was carried out on students in class VII-B SMP IT Ar Raihan Bandar Lampung which consisted of 24 students. Data on mastery of scientific literacy was collected using scientific literacy test instruments using test instruments that have been tested for validity, and reliability and have good distinguishing power. PTK is carried out in 2 cycles. In each cycle, there are two learning meetings. This research is declared successful if it meets all the specified criteria, namely (1) the student's scientific literacy test results increase from the previous cycle, (2) the student's mastery of scientific literacy skills is ≥ 75, class completion reaches ≥ 85% and the average score class ≥ 80. The results showed that 9 out of 24 students completed the scientific literacy of students before the action (pre-cycle) (37.5%), the class average was 58.0. After the action was taken, the results of the scientific literacy test showed that 22 students had completed it (91.6%), with a class average of 87.5. So, based on the research results, it can be concluded that the use of CAS-Plan in science learning has proven effective in increasing students' scientific literacy

The Effect of the Scientific Inquiry Learning Model on the Topic of the Respiratory System on the Critical Thinking Skills of Grade XI Senior High School Students

This study aims to determine the effect of the application of the Scientific Inquiry learning model on students' critical thinking skills on the subject matter of the respiration system in XI grade. This research methodology uses quantitative methods with the type of quasi experiment. The study population amounted to 150 students from XI grade Senior High School 1 Sei Suka. The sample of this study consisted of 2 classes determined by cluster random sampling technique, namely X grade as an experimental class using the Scientific Inquiry learning model and X grade as a control class using conventional learning. The instruments used in this study are critical thinking ability test instruments totaling 11 essay test questions that have been validated by one validator and have been tested for item validity. The results showed that the average critical thinking skills of students in the experimental class taught using the Scientific Inquiry learning model were in the high category and the average critical thinking skills of students in the control class taught using the conventional learning model were in the low category, this is based on the average postest value of the experimental class which is 77.3443 and the control class which is 37.4957. The results of hypothesis testing using Independent Sample t-test statistics show that there is an effect of the Scientific Inquiry learning model on students' critical thinking skills on the material of the respiration system in XI grade.Keywords: critical thinking skills of students, scientific inquiry learning model, conventional learnin

The Effect of the Search, Solve, Create, and Share (SSCS) Learning Model on Students’ Scientific Reasoning Ability

This study aims to determine the effect of using the Search, Solve, Create, and Share (SSCS) learning model on the scientific reasoning abilities of 12th-grade students in the topic of heredity. The sample consisted of 62 students from two classes, selected using purposive sampling. This research employed a quasi-experimental method with a non-equivalent pretest-post-test control group design. The data were analysed using an independent sample t-test at a 5% significance level. The results showed that the application of the SSCS model had a significant effect on improving students’ scientific reasoning, with a sig. (2-tailed) value of 0.000 < 0.05. The average N-Gain in the experimental class was 0.46, which falls under the medium category. The highest increase occurred in the probabilistic reasoning aspect (N-Gain = 0.42), while the lowest increase was in the combinatorial reasoning aspect (N-Gain = 0.36), both classified as medium. The effect size of the SSCS model on scientific reasoning was 1.47, which is categorized as large. Based on the questionnaire results, 78.43% of students agreed that the SSCS learning model made them more active in the learning process and helped them achieve a better understanding of heredity material. It can be concluded that the application of the SSCS model positively influences the improvement of students’ scientific reasoning skills and is well accepted by the students.Keywords: Search, Solve, Create, and Share Model; Scientific Reasonin

Implementation of Blended Learning Assisted by e-worksheets Focus on Enhancing Students Metacognitive Strategies

This research aims to analyze the improvement of metacognitive strategies and students' self-directed learning in the implementation of blended learning assisted by E-LKPD Liveworksheets in 10th-grade classes at SMAN 2 Gedong Tataan during the second semester, focusing on environmental change topics. The research was conducted at SMAN 2 Gedong Tataan using a quasi-experimental method with a Pretest-Posttest Equivalent Control Groups Design. The research sample consisted of 64 students from 10th-grade Science 1 (X MIPA 1) and 10th-grade Science 2 (X MIPA 2) classes, selected through purposive sampling. Data were statistically analyzed using the Independent Samples T-test with a 5% confidence level, utilizing IBM SPSS Statistics 25. The research findings indicated that the implementation of blended learning assisted by E-LKPD Liveworksheets significantly improved students' metacognitive strategies, with a significance value of 0.000 (p < 0.05). The highest indicator for metacognitive strategies was procedural knowledge (75.78%) with a very good rating, while the lowest was debugging strategies (71.09%) with a good rating.Keywords: blended learning, E-LKPD, Liveworksheets, metacognitive strategie

Analysis of the System Thinking Ability of Junior High School Students on the Main Material of the Digestive System

This research aims to describe students' systems thinking abilities on the main material of the Digestive System. The subjects of this research were 60 students of Junior High School 8 Bandar Lampung for the 2022/2023 academic year who were selected from a population of 275 students using a cluster sampling technique. This research uses an ex post facto design. System thinking ability data was obtained through description tests which were analyzed descriptively. The results of the research show that students' systems thinking abilities are in the sufficient category for 60% of students and in the deficient category for 40% of students. The highest systems thinking ability is in the indicator of the ability to examine the character of elements with an average value of 34.25 in the sufficient category, while the lowest systems thinking ability is in the indicator of correlating interconnections with an average value of 16.11 in the deficient category. Based on the results of data calculations, it can be concluded that in general students' systems thinking abilities are in the sufficient category.Keywords: system thinking ability, digestive syste

Improving Students' Critical Thinking Skills Using E-booklet Learning Media on Environmental Pollution Material

This study aims to determine the effect of using e-booklet media on the critical thinking skills of class VII students of SMP N 1 Way Tenong on environmental pollution. This research is an experimental research using design through pretest posttest quasi nonequivalent control group design experiment. The type of data used is quantitative and qualitative. The population in this study were students of class VII SMP N 1 Way Tenong and 2 classes were taken randomly using a simple random sampling technique. VII D class as the experimental class and VII E class as the control class. Data was collected through test instruments and questionnaires. The test instrument consists of 20 multiple choice questions which are made using four aspects of critical thinking indicators, namely: giving simple explanations, making further explanations, setting strategies, techniques, and concluding. The questionnaire instrument contains questions related to student responses learn using e-booklets. During learning process was performed using an independent sample t-test statistical test. The results of data analysis showed a significance value of 0.000 < 0.05, and the experimental class obtained an average n-gain result of 0.4184 in the medium category, while the control class obtained an average n-gain score of 0.2789 in the low category. The percentage of student response questionnaires obtained an average percentage of 70% in the well received category. This can be said that there is a significant influence of the use of e-booklet media on student’s critical thinking skills on environmental pollution materia