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Keamanan makanan dan minuman remaja sangat penting untuk kesehatan mereka, terutama mengingat peningkatan konsumsi makanan siap saji dan minuman berpemanis. Ketidaktahuan tentang kandungan gula dan keasaman minuman dapat meningkatkan risiko penyakit apabila dikonsumsi secara berlebihan. Melalui praktikum dan penyuluhan dasar literasi sains, kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pengetahuan dan kesadaran siswa tentang makanan dan minuman yang aman untuk dikonsumsi. Di SMK Ma'arif NU 2 Ajibarang, kegiatan dilakukan melalui metode penyuluhan interaktif, demonstrasi, dan praktikum untuk mengidentifikasi gula menggunakan reaksi Fehling dan Benedict serta pengujian pH minuman. Hasil kegiatan menunjukkan bahwa siswa memahami konsep dasar keamanan pangan; mereka tahu bahwa minuman mengandung gula yang lebih sedikit; dan mereka tahu tingkat keasaman beberapa sampel minuman yang diuji. Sasaran Pembangunan Berkelanjutan (SDGs), terutama SDG 3 tentang kehidupan sehat dan sejahtera, SDG 4 tentang pendidikan berkualitas, dan SDG 12 tentang konsumsi yang bertanggung jawab, akan dilaksanakan melalui kegiatan ini. Selain itu, inisiatif ini sejalan dengan program Asta Cita yang bertujuan untuk meningkatkan kualitas sumber daya manusia melalui pendidikan kesehatan dan sains terapan. Kegiatan ini diharapkan akan membantu siswa menjadi lebih cerdas dalam memilih makanan dan minuman yang sehat dan aman untuk dikonsumsi setiap hari.

This study aims to evaluate the validity, effectiveness, and practicality of developing problem-based teaching materials for improving student learning outcomes. The research focuses on a practical module for the subject of electric motor installation at SMKN 1 Driyorejo, where interviews and needs assessment revealed issues such as teacher-centered learning and limited student resources, primarily relying on notebooks. These factors have hindered optimal learning outcomes. The development of problem-based learning modules was intended to address these issues and improve cognitive, affective, and psychomotor learning outcomes. The research follows a Research & Development (R&D) approach with four steps: 1) Define, 2) Design, 3) Develop, and 4) Disseminate, using a one-shot case study trial design. The study involved 30 students of grade XI TITL 1 at SMKN 1 Driyorejo. Results showed the module’s validity at 3.66, practicality based on student responses at 89.25, and effectiveness with cognitive, psychomotor, and affective outcomes of 84.93, 89.40, and 94.00, respectively. These findings suggest that the problem-based practical module is valid, practical, and effective for improving student learning outcomes across various domains.

Histology practicum, as one of the compulsory practicum courses, offers a great opportunity to practice various aspects of science process skills through microscopic tissue observation activities, identification of cell and tissue structures, and analysis of tissue functions in organisms. This study aims to analyze the science process skills biology education students through histology practicum activities. This study uses a quantitative descriptive approach with a survey method to analyze the science process skills of biology education students through histology practicum activities. Data collection in this study used three main techniques, namely science process skills tests, direct observation, and analysis of practicum report documents. Furthermore, the data were analyzed descriptively quantitatively using descriptive statistics to describe the profile of students' science process skills. Analysis per aspect revealed that students had good skills in the aspects of observing (78.50%), classifying (76.33%), interpreting data (71.67%), applying concepts (73.25%), and communicating results (73.40%), which indicates that histology practicum is effective in developing basic science process skills. However, the aspects of formulating hypotheses (58.17%) and planning experiments (54.83%) were still in the sufficient category, indicating that students experienced difficulties in integrated science process skills that require higher-order thinking skills. The findings this study provide important implications for the development of more comprehensive histology practicum learning strategies, including the integration of inquiry approaches, the use of continuous formative assessment, the application of differentiated learning, and strengthening the connection between theory and practice to optimize the development of all aspects of science process skills of prospective biology teachers.  

This study aims to determine the effect of the Snowball Throwing learning model assisted by simple experiments on students’ achievement motivation in colloid material. The independent variable in this study is the Snowball Throwing learning model assisted by simple experiments, while the dependent variable is students’ achievement motivation. The type of research used is a quasi-experiment with a post-test only control group design. The population of the study consisted of all 38 students of class XI MIA at SMA Negeri 16 Samarinda, all of whom were taken as samples using a saturated sampling technique. The research instruments were an achievement motivation questionnaire and an observation sheet. Data were analyzed using normality tests, homogeneity tests, and t-tests at a significance level of 0.05. The results showed that the average score of students’ achievement motivation in the experimental class was higher, at 83.68%, compared to the control class, which was 75.53%. Therefore, it can be concluded that the application of the Snowball Throwing learning model assisted by simple experiments has a positive and significant effect on students’ achievement motivation in colloid material at SMA Negeri 16 Samarinda.  

This study investigates the effect of added sugar on the stability of soap bubbles through a hands-on science activity titled “Magic Bubbles” conducted with third-grade students at SDN 1 Karangrejo. The activity was implemented collaboratively, where students observed, experimented, and drew conclusions together under teacher guidance, without the use of individual worksheets. Using a participatory observation method, the research described students’ engagement, reactions, and learning behavior during the process. Findings revealed that soap bubbles containing added sugar demonstrated greater stability and a longer lifespan compared to those without sugar. Students showed high levels of enthusiasm, curiosity, and active participation throughout the experiment. The activity not only fostered engagement but also enhanced students’ gross motor coordination, observation skills, and early scientific reasoning. Furthermore, it encouraged cooperative learning and communication among peers. The results highlight the effectiveness of simple laboratory-based learning as a medium to introduce scientific inquiry at the elementary level. The “Magic Bubbles” activity aligns with the inquiry-based learning approach in science education, emphasizing direct experience, experimentation, and concept discovery through observation and guided reflection. This study demonstrates that contextual, play-based science activities can meaningfully improve motivation and conceptual understanding among young learners.

Physics learning in high schools is often facing challenges due to lack of laboratory facilities, especially for abstract topics such as electron deflection. Limited equipment often results in a theoretical learning process without real-world practical experience. This community service activity aims to address this gap by assisting with electron deflection experiments at a high school in Surabaya. The methods applied included preparation and coordination, provision of equipment, inquiry-based learning design, classroom experiment implementation, and activity evaluation. During the program, the team brought the electron deflection experiment equipment to the school. Students were divided into small groups, and each group took turns interacting closely with the equipment brought by the team. Students were encouraged to propose hypotheses, observe carefully, and engage in discussions. A total of 58 students participated in this activity and had the opportunity to directly observe electron path in a cathode ray tube. The evaluation showed an excellent response from students with an average score of 3.48 (scale 1–4), where they felt this activity helped them learn theory with practice and increased their enthusiasm for learning. This program demonstrates that collaboration between universities and schools can be an efficient solution to overcome the lack of laboratory facilities and improve the quality of more meaningful physics learning.

Fermentation of seluang fish (Rasbora spp.) pekasam is a traditional method for extending shelf life and enhancing flavor, typically produced through spontaneous fermentation dominated by lactic acid bacteria (LAB). However, uncontrolled production processes lead to significant variability in product quality. This research aims to optimize the fermentation process of seluang fish pekasam through a series of controlled microbiology-based experimental practicums. The experiments were designed to investigate the impact of two main parameters: (1) the use of a LAB starter culture isolated from high-quality pekasam, and (2) the control of incubation temperature (e.g., at 25°C and 30°C). During the fermentation period, samples were periodically analyzed to measure changes in physicochemical parameters, including pH, moisture content, and salt concentration. Microbiological analysis was performed to count the populations of LAB and other spoilage microbes. The results showed that the use of a LAB starter culture significantly accelerated the pH drop within the first 24 hours, reaching a critical pH below 4.5, which effectively inhibited the growth of pathogenic microbes. Furthermore, the optimal raw material ratio and controlled incubation temperature resulted in pekasam with a firmer texture and a more balanced sour-savory taste, differing significantly from spontaneously fermented products. Organoleptic tests confirmed panelists' preference for the product made with the optimal treatment. The conclusion of this study is that optimization through microbiology-based experimental practicums is key to the standardization and improvement of the quality and food safety of pekasam products.

Solid waste from the tapioca processing industry, which is based on cassava (Manihot esculenta), is a medium rich in organic matter, particularly starch, that supports the growth of various types of microorganisms, especially fungi and bacteria. This study aims to isolate and observe the morphology of microorganisms from solid waste of cassava from the tapioca industry using Potato Dextrose Agar (PDA) medium in a series of pharmaceutical microbiology practicum. Waste samples were taken from the tapioca processing site, then underwent a serial dilution process and inoculation into PDA medium, which was incubated at 28–30°C for 5 days. The isolation results showed the growth of microorganisms with diverse colony morphologies, which are suspected to originate from the genera Aspergillus, Penicillium, and Rhizopus, based on macroscopic and microscopic characteristics. The presence of these microorganisms indicates the potential utilization of cassava waste as a source of microbial isolates for biotechnological and pharmaceutical applications, such as enzyme production and development of bioactive compounds. This practicum activity also contributes to increasing students' understanding of isolation techniques, microorganism characterization, and their role in biological-based waste management.

Lip balm is a cosmetic product designed to protect and maintain the moisture of the lips, especially from environmental factors that can cause dry, cracked, or irritated lips, such as low temperatures and wind. Dry lips can interfere with comfort and appearance, making protection with lip balm essential. This study aims to formulate and evaluate a lip balm preparation made from a combination of natural and chemical ingredients, such as cera flava, oleum cacao, nipagin, glycerin, lanolin, and the addition of powder dye. These ingredients were chosen because of their ability to maintain lip moisture, provide protection against external factors, and ensure long-term safety for use. The lip balm manufacturing process begins with heating the primary ingredients, cera flava and oleum cacao, which are melted first. After the primary ingredients have melted, additional ingredients such as nipagin, glycerin, lanolin, and powder dye are added gradually. The mixture is stirred carefully to ensure that all ingredients are evenly blended. Once all the ingredients are well-mixed, the liquid mixture is poured into molds and allowed to cool and harden. This process is crucial for achieving the desired lip balm texture, which should not be too hard or too soft and should facilitate easy application to the lips. Based on the analysis results, the formulated lip balm demonstrates good physical stability, without significant changes in color, odor, or texture during testing. The lip balm also provides ease of use, with a smooth texture that is easy to apply to the lips. The results of this study show that the combination of ingredients used can produce an effective lip balm product that maintains lip moisture and provides optimal protection against harsh environmental conditions, such as low temperatures.

Orthosiphon aristatus is a medicinal plant that has the potential as a natural antibacterial agent. This study aims to evaluate the effect of cat's whiskers leaf extract on microbial growth using Nutrient Agar (NA) media with variations in extract concentrations of 100 gr, 50 gr, and 25 gr. Antibacterial activity tests were carried out using the well diffusion paper disk method, and observations of microbial growth inhibition zones were carried out after incubation for 24 hours at 37°C. The test results showed that there was inhibition of microbial growth that varied according to the concentration of the extract used; a concentration of 100 gr gave the largest inhibition zone compared to 50 gr and 25 gr. Data analysis showed that increasing extract concentration was directly proportional to increasing antibacterial effectiveness. These findings indicate that Orthosiphon aristatus leaf extract has the potential as a natural antibacterial that is effective in inhibiting microbial growth in NA media, so it has the potential to be developed as an active ingredient in pharmaceutical formulations.

This report is entitled "Clean Environment Movement with Young People in Real Action in Pagar Gunung Village," which aims to increase public awareness of the importance of maintaining environmental cleanliness. Through initial observations, problems related to indiscriminate waste disposal were found. The methods used include problem identification, socialization, and implementation of the provision of temporary waste disposal sites (TPS) and mutual cooperation activities. The results of the activities show an increase in public awareness and active participation of young people in maintaining environmental cleanliness, which has an impact on cleaner and healthier environmental conditions. The conclusion of this activity is the importance of community collaboration in environmental conservation efforts, as well as the need for ongoing support to maintain village cleanliness.

This study aims to describe the implementation of Shielded Metal Arc Welding (SMAW) techniques in practical training conducted by cadets of the Teknika Study Program at AMN Cilacap. The method employed is descriptive quantitative using a Likert-scale questionnaire (1–5). The research sample consisted of 40 second-semester cadets selected through purposive sampling. The questionnaire was structured based on four aspects: theoretical understanding, practical skills, compliance with safety procedures, and perceived obstacles. The results show that theoretical understanding was at a high level (average score of 4.1; 87.5%), practical skills were categorized as adequate (75%), and compliance with safety procedures was very high (90%). However, obstacles were still significantly perceived, with an average score of 2.88 and only 27.5% of respondents giving positive responses. The main obstacles faced by cadets included limited welding equipment, insufficient training in specific welding positions, and inadequate practice time. This study recommends improvements in practical facilities, diversification of training in various welding positions, and more effective management of practice schedules to support optimal learning outcomes.

  This study aims to analyze student activities and learning outcomes in the learning of Spermatophyta sub-material through practicum activities based on Exploring the Environment at SMP Negeri 4 Manado. The background of this study is based on the need for a contextual approach to biology learning and being able to increase student engagement actively. The method used was quantitative descriptive research with survey techniques, involving 20 grade VII students and 2 science teachers as respondents. The research instrument consisted of a closed questionnaire, an open interview, and an observation sheet. The questionnaire results showed that students responded very well to this learning method, with an average score of 83.4%. At the same time, teachers rated this approach as effective, with an average of 88%. Observations showed that students were active in practicum activities, enthusiastic in making observations, and involved in group discussions. The interview revealed that this environment-based learning strengthens students' understanding of biological concepts and increases scientific curiosity. The obstacles found include the accuracy of recording and the inequality of roles in group work. However, overall, exploring the Surroundings-based learning has been proven to positively impact student engagement and understanding, especially in connecting theory with real objects in the surrounding environment. The implications of this study emphasize the importance of applying contextual approaches in biology learning and suggest improving guidance strategies and recording of observations in the field for more optimal learning effectiveness.

This study aims to determine the extent of the influence of infrastructure management and understanding of sewing theory on the quality of practicum learning in the Fashion Department at SMK Negeri 1 Sangatta Utara. This study uses a quantitative approach with data collection methods through questionnaires, observation, and documentation. The research sample amounted to 107 students from a total population of 143 students in classes X, XI, and XII. The results of multiple linear regression analysis show that the management of infrastructure facilities has an influence of 16.26%, while the understanding of sewing theory has a greater influence, namely 71.53% on the quality of practicum learning. Simultaneously, the two variables contributed 87.9%, while 12.1% was influenced by other factors not studied. This finding confirms that the understanding of sewing theory has a more dominant influence than the management of infrastructure facilities in improving the quality of practicum learning in the Cosmetology department at the SMK.  

This study aims to analyze the strategy of natural science laboratory management in improving the quality of practicums in senior high schools. This study uses a literature review approach by examining various academic sources related to laboratory management. The results of the analysis indicate that effective laboratory management includes five main strategies, namely management of equipment, materials, data, laboratory personnel training, and cost budgeting. The success of implementing this strategy depends on the implementation of supporting factors such as work safety, infrastructure quality, personnel capabilities and excellent data management systems. However, there are still many obstacles, including limited facilities and infrastructure, lack of professionals, inadequate budgets, and optimal planning and implementation of practices. Comprehensive improvements in laboratory management are expected to enable learning science to be implemented in a more optimal and sustainable manner.

Green grass jelly (Cyclea barbata) leaves are one of the herbal plants found in Indonesia and have various potential health benefits. This plant is known to contain bioactive compounds such as flavonoids, tannins, and alkaloids that act as antioxidants, anti-inflammatories, and help regulate blood sugar levels in the body. The utilization of green grass jelly leaves is not only as a refreshing traditional drink ingredient, but also as a source of natural medicine that is environmentally friendly and easily accessible to the community.This activity aims to increase awareness and knowledge of students and teachers about the benefits of green grass jelly leaves, as well as teach simple but effective processing techniques to produce value-added processed products.The research method used descriptive qualitative method.The results of this activity showed an increase in participants' understanding and skills in processing green grass jelly leaves into products that are suitable for consumption, as well as fostering interest in utilizing herbal plants as part of a healthy lifestyle.

Understanding electric motors and transformers is crucial in the field of electrical power engineering education. To enhance practical learning, a trainer was designed for single-phase AC motors, incorporating an Earth Leakage Circuit Breaker (ELCB) safety system to prevent electric current leakage, which could pose a risk during experiments. The aim of this research is to design and develop a trainer module that serves as both an interactive and safe learning tool for laboratory practicums. The trainer is equipped with a safety circuit, along with controllers such as a voltmeter, ammeter, selector switch, pushbutton, relay, and potentiometer, allowing students to understand and control various electrical parameters. The tool underwent voltage measurements and functional tests at three distinct measurement points to evaluate its performance and safety features. The results demonstrated that the trainer performed effectively, significantly enhancing students' practical understanding of electric power systems and contributing to better hands-on learning experiences in electrical engineering.

Analysis of the preliminary research phase as the basis for developing a biology practicum guide based on a scientific approach. The purpose of this study was to describe the initial research stage data obtained as a basis for developing teaching and learning materials based on research results that will be made in the future. The development model applied in this study is the Plomp model, which has reached the initial data investigation stage. Instruments for collecting data include interviews, observations, and questionnaires. The results of the student needs questionnaire revealed that students agreed that it was necessary to develop a practicum guide based on a scientific approach with a percentage of 94.73%. The teaching materials that have been used in learning are less effective so that students are less able to understand the subject matter. So it can be concluded that it is necessary to develop teaching materials for practicum guides based on a scientific approach on the material of the circulatory system and respiratory system in class XI SMAN 15 Pekanbaru.

SMK Negeri 3 Jayapura is one of the vocational schools specializing in technology engineering in Jayapura City. There are three primary issues at SMK Negeri 3 Jayapura. First, the limited competence of teachers in microcontroller programming. Second, there is a lack of facilities and infrastructure for microcontroller practical work. Third, the low achievement and interest of students in the latest technological developments. The proposed solutions in this community service activity include: conducting training on Arduino Uno and Espressif microcontrollers using the Arduino IDE programming platform, developing practical modules for microcontrollers, sensors, and actuators, providing a master file for Arduino Uno programs, installing the necessary software on school computers, conducting robotics training for students. All five solutions were successfully implemented and received positive appreciation from both students and teachers at SMK Negeri 3 Jayapura.

Aplikasi digital learning merupakan bentuk aplikasi pengembangan dan implementasi yang dirancang untuk mata pelajaran Teknologi Informasi dan Komunikasi (TIK) pada SD Negeri 1 Fakfak. Aplikasi ini dirancang dengan tujuan untuk menarik perhatian para siswa-siswi dalam belajar dan memudahkan guru pengampu mata pelajaran TIK ketika mengajar. Aplikasi ini dirancang berbasis web sehingga dapat diakses menggunakan jaringan internet. Di dalam aplikasi ini menyediakan beragam materi yang berkaitan dengan mata pelajaran TIK dan tampilan dari aplikasi ini dibuat semenarik mungkin, yang dimana aplikasi ini berisi tentang materi teks, materi video, latihan soal, dan praktikum.  Selain itu aplikasi ini dirancang untuk mengukur tingkat kemampuan siswa-siswi sebelum dan sesudah belajar menggunakan aplikasi pembelajaran digital learning. Sehingga guru dan orang tua mengetahui perkembangan belajar anak didiknya melalui aplikasi digital learning. Selain itu aplikasi ini juga membantu para siswa-siswi untuk dapat belajar mandiri di rumah tanpa di damping oleh guru karena aplikasi ini dilengkapi dengan fitur penjelasan materi teks dan juga materi video, sehingga siswa-siswi dapat mengulang materi pembelajaran di rumah ketika ada materi yang belum di pahami. Dengan adanya aplikasi pengembangan dan implementasi digital learning ini diharapkan dapat memberikan kontribusi positif dan dapat meningkatkan kualitas kepada seluruh siswa-siswi SD Negeri 1 Fakfak dalam belajar.