This research studies consumer protection against the dangers of using mercury skincare for health, so that consumers, especially women, can be more careful in choosing and using skincare. Mercury is an ingredient that is often added to skincare ingredients that function to produce white facial skin quickly. Mercury can flow through the blood throughout the body which can cause death. However, many consumers among women are more easily tempted to use mercury-based skincare because they see instant results. Skincare made from mercury is strictly prohibited from use because of its content which can cause damage to organs and nerves of the body by a substance such as chemicals and cause abnormalities in the functioning of the health system. The purpose of this study is to analyse consumer protection against cases of skincare products containing mercury such as the case of lightening cream and night cream brand MH.  
 

 
Abstract. This study aims to determine the significant effect of the Problem Based Learning (PBL) learning model on the creative thinking skills of grade 4 students of Kleco 1 Surakarta Elementary School. This study uses a quantitative approach based on the philosophy of positivism. The population and sample used in this study were 25 grade 4 students of Kleco 1 Surakarta Elementary School. The sampling technique used was purposive sampling. This study used a One-Group Pretest-Posttest Design research design. In this design, before the treatment is given, a pre-test (initial test) is carried out, then treatment is given, and after the treatment is given, a post-test (final test) is carried out. Data collection techniques use observation, testing, and documentation. Based on the results of the study, it can be concluded that the application of the Problem Based Learning (PBL) model has a significant effect on improving the creative thinking skills of grade 4 students of Kleco 1 Surakarta Elementary School in the material of Style Around Us. This is indicated by an increase in the average value from the pretest of 54.4 to 80 in the posttest, as well as the results of the Paired Sample T-test which showed a significant difference before and after treatment.

The objectives of the study are (1) to determine the critical thinking skills of 5th grade students of SD Negeri 03 Jumapolo, Karanganyar. (2) to determine the factors underlying the critical thinking skills of 5th grade students of SD Negeri 03 Jumapolo, Karanganyar. This study used qualitative research that lasted for 2 weeks. Data collection techniques in this study used observation, interviews, and documentation. The results of this study indicate that (1) the critical thinking skills of 5th grade students of SD Negeri 03 Jumapolo, Karanganyar in solving story problems on addition and subtraction material do not fully have critical thinking skills because there is one aspect that has not been fulfilled, namely not being able to conclude addition and subtraction material through story problems. (2) The factors that influence critical thinking skills in 5th grade students of SD Negeri 03 Jumapolo, Karanganyar are 2 factors, namely psychological factors and physiological factors.
 

Students gain practical experience in the world of education through the Introduction to School Field Programme and gain a better understanding of the school environment. This service activity combines lecture theory with real educational practice. The methods used by students include observation, participation in teaching and learning activities, discussions with teachers and students, and documentation. The results of this service show that students have a better understanding of learning methods, classroom management, and problems faced by teachers in elementary schools. In addition, schools also benefit from the assistance provided by students in the learning process. SD Muhammadiyah 019 Bangkinang Kota is the place for this PLP activity. The principal is Mr Musta'in, S.Pd, located at Jalan Muhammadiyah Bangkinang District, Kampar Regency, Riau 28463. The implementation of PLP began on 13 January 2025 and ended on 23 February 2025.

This Community Service (PkM) activity is intended to solve problems that exist in certain community groups in adulthood. Hypertension can result in dangerous diseases such as heart disease and stroke if not treated in the long term. The PkM team provides education to provide solutions. The PkM activity implementation team collaborates with the local village government. The method used in this activity is counseling on hypertension from a team of nursing lecturers and nursing students during Field Learning Practice starting from anthropometric examination activities, blood pressure, blood sugar supplemented by interviews with the community. The respondents used in this educational activity were 35 people. The output of the PkM that has been implemented is in the form of reports and publications of articles so that they can be accessed by all parties who need related articles.

The development of information and communication technology has brought significant changes in the world of education, encouraging educational institutions to adopt more innovative and relevant learning methods. This article discusses the implementation of Canva graphic design application training at Madrasah Aliyah Muhammadiyah Pekanbaru, which aims to improve the creativity and digital skills of grade XII IPA students. This activity was carried out through an interactive theoretical and practical approach, allowing students to not only learn about graphic design, but also apply that knowledge in real projects. The results of the training showed high enthusiasm from students, as well as significant improvements in their technical abilities and creativity. Evaluation of student design work indicated that the hands-on learning method was effective in improving digital literacy. These findings provide important insights into the potential of technology in creating a dynamic and innovative learning environment, and can be a reference for other community service programs aimed at improving digital competence in education.

Musculoskeletal injuries in school children are one of the problems found, especially in rural areas. Providing health education on first aid for musculoskeletal injuries can build knowledge, motivation, and self-efficacy, so it is important to develop new strategies. This study analyzes the comparative effect of local language first aid short film media and the "“Toma Cemas”” module on students' knowledge, motivation, and self-efficacy. This study used a quasi-experimental method with two groups pretest-posttest. The first group received health education through local language short films and the second group received a ““Toma Cemas”” module on first aid for musculoskeletal injuries. With a population of 234 students, this study involved 84 samples divided into two groups, each consisting of 42 respondents using a stratified random sampling technique. The results of the independent t-test to assess the comparison of knowledge show p value 0.045 (p 0.05) and self–efficacy show 0.005 (p value 0.05).  There is a significant difference in the mean of knowledge and self -efficacy between the two groups there. The motivation variable shows a p value of 0.141 (p 0.05) so there is no significant difference in mean value of motivation. ““Toma Cemas”” Module is more suitable for increasing students' knowledge because the module's materials are in written form accompanied by animated images and explanations. Local language short films have a more effective influence than the ““Toma Cemas”” Module suitable for increasing students' self-efficacy related to the use of local languages, which help students feel comfortable in the process of learning first aid in rural areas.

Plants contain several active ingredients beneficial for health, one of which is the persimmon plant, known for its tannins and phenolic compounds. This research aims to determine the effect of Black Persimmon Leaf Extract (Diospyros nigra) as an alternative for lowering glucose levels in White Rats (Rattus norvegicus). This is a True Experimental research, which controls all external variables that could affect the experimental results. There are four control groups: a negative control using glucose and positive controls using extracts with concentrations of 15%, 30%, and 60%. The research data were measured using a UV-Vis Spectrophotometer and analyzed using One Way ANOVA with SPSS. The results of the Shapiro-Wilk normality test showed a significance value >0.05; Levene's Test for homogeneity showed a significance value >0.05; the One Way ANOVA test showed a significance value <0.05; and the Tukey HSD test showed a significance value >0.05. The objective of this research is to test the effectiveness of black persimmon leaves (Diospyros nigra) as an alternative to lowering blood glucose levels in white rats (Rattus norvegicus). Sample absorbance data were obtained using UV-VIS Spectrophotometry and analyzed using One Way ANOVA in SPSS.

The selection of building materials is vital for the development of high-quality infrastructure and residential projects. The two most commonly used building materials are red bricks and lightweight bricks. This study compares the productivity and cost of red brick and lightweight brick production and installation in construction projects. Data were obtained through direct observation, worker interviews, and Value Engineering analysis on the Shopee Semanggi Housing Project, which consists of 136 houses with a total estimated budget (RAB) of Rp10.93 billion. The results show that red brick installation productivity is 3.3 m²/day, while lightweight brick installation reaches 17.9 m²/day. The installation cost for red bricks is Rp1.52 billion for 12,786.78 m², compared to Rp1.62 billion for lightweight bricks for the same area. This study provides guidance for selecting building materials based on time and cost efficiency.

This study examines the effectiveness of Management Information Systems (MIS) in environmental permit administration within the Environmental Agency of Makassar City during the 2023-2024 period. Employing a qualitative case study approach, the research integrates several theoretical frameworks including Systems Theory, Technology Acceptance Model (TAM), Resource-Based View (RBV), Diffusion of Innovations, and Contingency Theory to comprehensively evaluate MIS performance. Through in-depth interviews with 35 respondents, direct observations, and documentation analysis over six months, the research identifies the impact of MIS implementation on environmental governance. Findings reveal significant improvements in processing efficiency (42% time reduction), administrative error reduction (67% decrease), and enhanced stakeholder engagement (53% increase in public participation). Nevertheless, challenges persist in regulatory alignment, technical reliability (12% system downtime), and user adaptation (23% of staff reporting usage difficulties). The study underscores the importance of continuous system optimization, targeted training, and cross-departmental integration for sustainable environmental governance. Theoretical contributions include an integrated MIS evaluation model for environmental administration contexts, while practical implications offer recommendations for technology-based permitting process improvements. Research limitations include a single geographic focus and relatively short observation period, suggesting the need for future longitudinal and comparative studies.