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Science process skills and conceptual mastery are two crucial aspects. Conceptual mastery involves understanding scientific concepts, while science process skills encompass the ability to conduct scientific work, apply concepts, predict and inquire, interpret and communicate, hypothesize, conclude, plan, and conduct experiments. The aim of this study is to determine the relationship between science process skills and conceptual mastery through practical methods. The research method employed is quantitative with a correlational design. The study population includes all 11th-grade MIPA students at SMA Negeri 1 Bumi Agung, Lampung, with cluster random sampling used to select Class XI MIPA 1 as the sample. Data collection involved observation sheets and tests. Data analysis was conducted using Pearson product-moment correlation coefficient. The correlation analysis began with testing prerequisites such as normality and linearity, confirming that the data were normally distributed and linear. The correlation between science process skills and conceptual mastery yielded an pearson correlation coefficient (r) of 0.940 with N = 32. The critical value (r-table) was 0.349. Since 0.940 > 0.349 and the significance value (2-tailed) was 0.00 < 0.05, H0 was rejected and H1 was accepted, indicating a very strong relationship between science process skills and conceptual mastery through practical methods. Theoretically, these findings affirm the importance of practice-based learning in strengthening conceptual understanding. Practically, the results recommend integrating structured laboratory activities to enhance students’ scientific inquiry skills and conceptual mastery.

This study aims to examine in depth the effectiveness of the application of the Children Learning in Science (CLIS) learning model in the Natural Science (Science) learning process. The background of this study stems from the problem of low active student participation in class, which is largely caused by difficulties in understanding abstract science concepts. The CLIS model offers a learning approach that emphasizes active student involvement through a series of systematic learning stages. The method used is a literature review with a qualitative descriptive approach. Analysis was conducted on 25 articles from national and international publications. Each article was reviewed based on relevance, research methods, main findings, and the suitability of CLIS application in various science learning contexts. The results of the study indicate that CLIS has proven effective in improving students' understanding of science concepts, developing science process skills such as observation, classification, measurement, and hypothesis testing, and encouraging active student participation during the learning process. In addition, this model is also able to improve critical thinking skills through exploration activities, experiments, group discussions, and reflection on learning outcomes. The CLIS stages, which include exploring students' prior knowledge, introducing new concepts through experiments, strengthening understanding through discussions, and strengthening concepts through reflection, enable students to construct knowledge independently and meaningfully. Based on these findings, CLIS is considered relevant and can be an effective alternative learning model to improve the quality of science learning at various levels of education.

This study aims to examine the problem of the lack of implementation of experiment-based learning in Biology subjects at SMA Nahdlatul Ulama Padangsidimpuan. The method used is descriptive qualitative with a case study approach, with data collection through interviews with Biology teachers and literature studies. The results showed that limited laboratory facilities, lack of practicum tools and materials, and limited learning time allocation were the main obstacles in the implementation of practicum. Although teachers realize the importance of experimental activities in improving students' understanding and science process skills, structural support from schools is still very limited. In response to these obstacles, several alternatives such as the utilization of virtual laboratories, the use of experimental videos, and simple experiments based on local resources have been attempted. This research recommends strengthening educational policies that support practicum-based learning through the provision of adequate infrastructure, continuous training for teachers, and development of alternative learning media. Thus, Biology learning can be more effective in fostering students' scientific skills and critical thinking according to the demands of the 21st century.

This research aims to analyze and develop students' science process skills, particularly in the use of measuring instruments, and their influence on understanding the concepts of quantities and units in physics. This research is motivated by the importance of mastering skills in using measuring instruments in physics learning, as well as the need for innovative teaching materials to improve students' understanding of fundamental concepts. This study employs a mixed-methods approach, combining both quantitative and qualitative methods. The quantitative approach is used to analyze data on students' skills in using measuring instruments and their understanding of concepts through tests. Meanwhile, the qualitative approach is employed to analyze data from observations and interviews with students and teachers regarding the effectiveness of using guided inquiry-based interactive multimedia teaching materials. The interactive multimedia teaching materials developed in this research are designed to facilitate learning about measuring instruments and measurement using a guided inquiry approach. A behavioristic approach is also considered in the development of these teaching materials to ensure students receive appropriate reinforcement throughout the learning process. Through this research, it is hoped that effective ways to develop students' science process skills and enhance their understanding of measuring instruments and measurement concepts in physics will be discovered, ultimately improving physics learning outcomes as a whole.

This article provides an explanation of how the use of LKPD using the guided inquiry learning model to train the science process skills of class X students at SMK Muhammadiyah 2 Pekanbaru. By using guided inquiry LKPD, it allows students to learn actively and be able to practice their science process skills. Students can improve their ability to observe, interpret observations, predict, apply concepts, communicate and ask questions. These are indicators that can be trained in science process skills. Data were collected through several techniques, including literature review and classroom observation. All data obtained in this article are based on the results of literature reviews and observations that have been made at SMK Muhammadiyah 2 Pekanbaru. The use of Guided Inquiry LKPD is expected to train students' science process skills, especially in science learning. The findings of this research include; lack of supporting learning media, such as infocus and speakers and inadequate networks that disrupt the learning process. The results showed that students' science process skills were well trained.

Increasing student learning activity needs to use a learning model. In a lesson there are methods that are used systematically which become a unified procedure in the delivery of learning material so that the learning objectives are achieved. This study aims to determine the application of science process skills in science subjects to the activeness of students at MTs Muhammadiyah Parumaan. This research uses a descriptive method with a qualitative approach. This descriptive research method is used because it relates to the topics and problems that will be discussed, namely the application of science process skills in science subjects to the activeness of students at MTs Muhammadiyah Parumaan. The learning activity of VII B students at MTs Muhammadiyah Parumaan was based on the results of the supervision of the school principal when the teacher taught classes using conventional methods, not all students had active learning during the learning process. Researchers apply learning with science process skills. The results showed that the application of process skills to class VII B students at MTs Muhammadiyah Parumaan experienced an increase from the low category to the medium category    

The change in the Merdeka Curriculum has made learning tools in various subjects including biology in class X inadequate. This study aims to determine the feasibility of Problem-Based Learning (PBL) based LKPD (student worksheet) accompanied by Science Process Skills (KPS) on the material of environmental changes in class X. The development model refers to the research and development (R&D) method with 5 stages. The stages are potential and problems, data collection, product design, design validation, and design revision. The research instruments used were instrument validation questionnaires and validation sheet questionnaires. The validated aspects are the format, content, language, and benefits/usability of LKPD. Validation was carried out by 5 validators. Analysis of validation results using face validity Aiken's V with criteria V = 0.87. The results showed that the LKPD met the valid criteria with a total average of 0.947. It can be concluded that problem-based learning-based LKPD accompanied by science process skills is declared valid and ready to proceed to the trial stage.

. This research aims to determine the effect of an environmentally based guided inquiry model on students' science process skills. Quasi Experimental research was conducted with a Pretest-Posttest Control Group Design- nonequivalent control group. Saturated sampling technique was used to determine the treatment class, namely class VA as the control class and class VB as the experimental class. Data collection was carried out using a written test in the form of short answer questions. For the data results obtained by the experimental class, the average pre-test score was 56 and the post-test score was 70. Meanwhile, the data results obtained by the control class had an average pre-test score of 52 and post-test score 58. Based on statistical tests using the SPSS test. effect size (ES), probability value (significance) is 0.89, so the Ho hypothesis is rejected, meaning the guided inquiry model has a significant effect on students' Science Process Skills.

This study aims (1) to determine whether the guided inquiry learning model has an effect on the students' science process skills, (2) to find out whether the PBL learning model affects the students' science process skills, (3) to find out the differences in the students' science process skills. VII SMPN 5 Dusun Selatan which uses the guided inquiry learning model and the PBL learning model. The method in this research is comparative quantitative. The research design used was the Nondomized Control Group Pretest-Posttest Design. The instrument used was a test in the form of multiple choice questions totaling 25 questions and an observation sheet for students' science process skills. The research sample was students of class VII A and class VII B at SMPN 5 Dusun Selatan. The data collection technique was carried out using the observation method of students' science process skills and learning outcomes tests. The data were analyzed descriptively. The results of this study show that (1) the value of the science process skills of students using the guided inquiry learning model has an average value of 92%, (2) the value of the science process skills of students using the PBL learning model has an average value of 96 %, (3) the difference in the science process skills of students who are taught using the guided inquiry learning model and the PBL learning model, it can be seen from the results of the average value obtained that there are differences, where the PBL learning model has a higher average value than the learning model. guided inquiry. The learning outcomes of the guided inquiry class had an average score of 39 on the pretest and 68 on the posttest. Meanwhile, the average value of the pretest in the PBL class was 40.4 and the posttest score was 69.3. These results indicate that the guided inquiry learning model and the PBL learning model can improve students' learning outcomes and science process skills.

This research and development aims to develop a valid and effective Microbiology module based guide inquiry on research on Isolation and Identification of Endophytic Bacteria from Ciplukan. The microbiology module was developed in reference to the ADDIE research and development model. The module drafting phase includes:1) the analyzing step through interviews with lecturers and the questionnaire of needs analysis by student respondents; 2) The step of designing learning modules to improve cognitive knowledge and process skills; 3) The step of developing by using module validation; 4) The step of applying which consists of module implementation in learning; 5) The evaluation step which consists of evaluating the validity of modules, cognitive learning outcomes and student science process skills. The results of the study show that the microbiology module developed accordance with the standards of validity, feasibility and practicality.