This study aims to design and produce Student Worksheets (LKPD) based on the Student Teams Achievement Division (STAD) on class XI human respiratory system material. This type of research is Research and Development (Reasearch & Development) with the ADDIE model (Analysis, Design, Development, Implementation and Evaluation). The subjects of this study were 2 material expert validator lecturers and 2 learning expert validator lecturers, the assessment of 1 biology teacher, and the responses of class XI MIPA-3 students of SMAN 1 Labuhan Deli T.A. 2022/2023. Data analysis used quantitative and qualitative descriptive analysis. The results showed that the development of STAD-based LKPD obtained validation results by material experts of 96.88% in the "very feasible" category, validation by learning experts of 90.13% in the "very feasible" category, assessment by biology teachers of 93.42 % in the "very feasible" category, the student response was 94.96% in the "very feasible" category, and the results of the effectiveness test obtained an N-gain score of 0.72 which was included in the "high" category and was considered effective in being used in the learning process biology in the material of the human respiratory system.

This study aims to determine the effect of the Thinking Aloud Pair Problem Solving (TAPPS) method on students' mathematical communication abilities. The type of research used is a Quasi-Experimental type (pseudo-experimental) and uses the True Experimental Design research design with the Posttest-Only Controll form. The research was conducted at SMP Ikhlasiyah Palembang with a population of all students of class VII consisting of 2 classes. The sample were taken from all members of all population so that class VII.1 as the experimental class was given treatment, namely the Thinking Aloud Pair Problem Solving (TAPPS) method and class VII.2 as the control class which was not given treatment, namely the conventional method. Research data was collected through tests. Based on the analysis of the test results, it shows that the students' mathematical communication skills in the experimental class are higher than those in the control class. This means that the class that was treated with the TAPPS method affected students' mathematical communication skills. Statistical calculations obtained from the test results yield tcount = 2.944 and ttable = 2.013, so that tcount > ttable which causes H0 to be rejected and H1 to be accepted. Thus, it can be concluded that there is an influence of the Thinking Aloud Pair Problem Solving (TAPPS) method on the mathematical communication abilities of class VII students of SMP Ikhlasiyah Palembang.
 
 

The study focuses on how viral content on TikTok influences the Fear of Missing Out (FOMO) experience among Generation Z, particularly in the context of fashion product consumption behavior. This topic is important because Generation Z, as active social media users, are vulnerable to digital social pressure influenced by viral content. The research method used an online survey involving 38 Gen Z TikTok users, with data analyzed using simple linear regression via SPSS. The results indicate a positive and significant effect of viral content on FOMO, with a contribution of 53.7% (R² = 0.537). These findings affirm the role of social media in shaping consumer behavior based on digital trends. The implications are important for the fashion industry and digital marketing in designing effective promotional strategies while considering ethics and digital literacy. In conclusion, viral content on TikTok significantly contributes to increasing FOMO among Generation Z, highlighting the need to enhance digital education to help young consumers manage the influence of online trends.

The community service activity was carried out in Lima Puluh Subdistrict, Batu Bara Regency. The partner in this activity was the Regional Development Planning, Research, and Development Agency. The main problem faced by the partner is the absence of an official slaughterhouse building in Batu Bara Regency. Until now, only independently managed slaughterhouses owned by the community have been used as animal slaughtering facilities. However, these slaughterhouses can only accommodate a limited number of slaughters. Moreover, issues related to poor meat hygiene and cross-contamination during slaughtering and packaging processes for consumer distribution are still frequently encountered. The solution to this problem is to establish an official slaughterhouse in Batu Bara Regency that meets both administrative and technical requirements. The purpose of this activity is to provide understanding to the community and stakeholders regarding the utilization of an official slaughterhouse and the importance of having a standardized slaughterhouse. The expected outcomes of this community service activity are: (1) to increase public knowledge in Batu Bara Regency regarding the importance of RPH utilization, (2) to enhance awareness of providing meat that is Safe, Healthy, Whole, and Halal (ASUH), and (3) to provide recommendations to the local government regarding the planning and development of an official slaughterhouse.

Korupsi merupakan ancaman terbesar bagi keberlangsungan hidup berbangsa dan bernegara saat ini. Korupsi dapat ditemukan baik di lembaga pemerintahan maupun swasta, serta melibatkan pimpinan lembaga yang sejatinya menjadi role model bagi generasi muda. Upaya untuk menekan angka tingginya korupsi ditempuh melalui aspek hukum, namun upaya preventif melalui aspek pendidikan belum banyak ditempuh. Pendidikan anti-korupsi merupakan upaya preventif untuk membangun kesadaran dan integritas diri terhadap perilaku koruptif. Pengabdian kepada masyarakat ini berfungsi menjadi penyuluhan kepada masyarakat mengenai pendidikan anti korupsi. Tidak hanya penyuluhan mengenai, pendidikan anti-korupsi saja, kegiatan pengabdian kepada masyarakat ini juga memberikan penyuluhan mengenai sadar hukum dan bantuan hukum.

This research aims to examine the learning methods and challenges faced by several students when solving mathematics problems regarding number patterns, with an emphasis on analyzing students' thinking processes. This study employs an approach to analyze students' ways of thinking. In this study, a qualitative approach is used with a case study method on a group of junior high school students. Information was collected through observations and analysis of students' work. The findings of the research indicate that students apply various strategies in understanding the material of number patterns, which include memorizing patterns to trying to find their own formulas. However, many students face difficulties in drawing conclusions about patterns and connecting relevant mathematical concepts to everyday life. Common mistakes include errors in recognizing patterns, errors in calculations, and a lack of precision in understanding problems. Analysis of the thinking process shows that some students are still at the concrete operational thinking level, so they need visual aids and real-life examples to better understand patterns. This research emphasizes the need for an approach in teaching that can enhance students' abstract thinking abilities and requires varied practice in determining numerical pattern problems.
 
 

Photosynthesis is a vital process for plants in converting light energy into chemical energy stored in organic compounds. Light intensity is one of the main factors influencing the efficiency of this process. This study aims to determine the effect of different light intensities on the photosynthesis rate and growth of spinach plants (Amaranthus sp.), which is a C4 plant species.The method used was a quantitative experiment with three light intensity treatments: low (0–10 lux), medium (10–20 lux), and high (>20 lux), each replicated three times over six weeks. Observed parameters included plant height, number and length of leaves, as well as the photosynthesis rate measured using the IRGA method.The results showed that light intensity significantly affected the growth and photosynthesis rate of spinach plants. The high light treatment produced the most optimal growth, with an average plant height of 4.92 ± 0.4 cm and the highest photosynthetic activity. Conversely, the low light treatment caused symptoms of etiolation, reduced vitality, and faster plant death, averaging by the third week.In conclusion, increasing light intensity significantly enhances photosynthesis efficiency and growth in spinach plants. These results can serve as a basis for regulating light intensity in cultivation systems, both conventional and hydroponic.
 

This study aims to assess the potential development of beef cattle farming businesses for farmers in Perbaungan District, Serdang Bedagai Regency. The variables used in this research are beef cattle production and beef cattle prices as independent variables, and farmers' income as the dependent variable. The analysis approach utilizes a quantitative method with a multiple linear regression model using time-series data sourced from the Central Statistics Agency (BPS) of Perbaungan District for the period 2019–2023. The results indicate that the development of beef cattle farming businesses in Perbaungan District has significant potential to increase farmers' income and improve their welfare. The variables of beef cattle production and beef cattle prices collectively have a significant influence on farmers' income.

This study aims to describe the economic dynamics among street vendors (PKL) in Tarutung. Using a case study approach, this research identifies various factors influencing the sustainability and development of street vendor businesses, as well as the socio-economic impacts on the surrounding community. The primary focus of the study is to understand the role of PKL in the local economy, including job creation, income generation, and the challenges faced regarding government policies and business competition. Data was collected through field observation, in-depth interviews with vendors, and an analysis of relevant local policies. The findings reveal that although PKL face challenges related to regulations and market access, they play a crucial role in the economic dynamics of the region and can be key pillars in local economic development.

This study aims to analyze the influence of Organizational Justice on Performance with Work Effectiveness as an Intervening Variable among employees of PT Perkebunan Nusantara IV Regional IV Rimbo First Business Unit, Tebo Regency.A sample of 78 respondents was selected using the Total Sampling technique (saturation sampling). Based on the data processing results using SEM-PLS, it was found that, directly (direct effect), Organizational Justice significantly affects Employee Performance, Organizational Justice significantly affects Work Effectiveness, and Work Effectiveness significantly affects Employee Performance. Then, indirectly (Indirect Effect), Organizational Justice significantly affects Employee Performance mediated by Work Effectiveness.