Climate change has had a significant impact on various aspects of life, including air temperature in urban areas such as Medan City. This study aims to analyze changes in air temperature in Medan City during and after the COVID-19 pandemic, especially related to social restriction policies such as PPKM. Temperature data was obtained from UPT BMKG Medan for the period 2020 to 2025 and analyzed using I-MR (Individual-Moving Range), Cusum, and EWMA (Exponentially Weighted Moving Average) methods. The results of the analysis are expected to be able to show significant temperature differences as a result of the decline in human activities during the pandemic as well as the trend of post-pandemic temperature changes. This study is important as a basis for future environmental planning and climate change mitigation policies.

Mathematical representative ability is a person's ability to express mathematical ideas, objects, and relationships in various forms of representation, both visually, symbolically, verbally, and contextually. This study aims to analyze the mathematical representative ability of students through counting operations in grade III elementary school in the form of story problems. The method used was descriptive qualitative research with written test instruments to assess cognitive abilities and observation to assess psychomotor skills. The research subjects consisted of five grade III elementary school students, by giving test questions on mathematical reasoning skills, observing students directly in solving and understanding story problems, conducting documentation to obtain accurate data when in the field by classifying students' mathematical representative abilities based on math scores. The results showed that most learners had a very good level of cognitive ability in completing arithmetic operations, but there were some learners who were still lacking in understanding story problems. This finding confirms that the importance of appropriate learning strategies so that learners are not only able to solve problems in the form of operations but also able to understand problems in the form of story problems that are applied in real life.

This study aims to describe students' mathematical understanding abilities through the application of a problem solving approach using magic coin media on integer operation material. This study is a qualitative study with a descriptive approach conducted at MTs An-Nuur Palembang in May of the 2025/2026 academic year. The subjects of the study were 25 grade VII students who were selected purposively. Data collection was carried out through observation, documentation, and learning outcome tests. The results of the study showed that the use of magic coin media in mathematics learning was able to improve students' conceptual understanding. This media helps students to be more active, understand integer operations concretely, and be involved in the problem-solving process independently or in groups. These findings indicate that the problem solving approach combined with magic coin media can create a fun learning atmosphere, and is effective in improving students' mathematical understanding abilities.

This study was motivated by the low learning outcomes of students in Physics subjects in class XII MIPA 7 at SMAN 1 Cikalongwetan, where most students had not reached the minimum mastery criteria. The purpose of this research was to improve student learning outcomes through the implementation of the Problem-Based Learning (PBL) model. The study employed a Classroom Action Research (CAR) method conducted in two cycles, each consisting of two meetings. Each cycle included planning, action, observation, and reflection stages. Data were collected through observations and written tests. The results showed an improvement in student learning outcomes after the implementation of the PBL model, as indicated by the increased number of students achieving scores above the minimum standard and a higher percentage of overall mastery. These findings suggest that the Problem-Based Learning model can be an effective solution to enhance student achievement in Physics. The implication of this study emphasizes the importance of the teacher’s role in designing student-centered learning and facilitating critical thinking and problem-solving skills.

Understanding geometric concepts is an essential part of the mathematics learning process in elementary school. However, many fifth-grade students face challenges in grasping these concepts due to monotonous and less interactive learning media. These difficulties contribute to students' low comprehension of geometric concepts. The purpose of this study is to analyze the contribution of interactive media in strengthening students' understanding of geometric concepts in elementary school. The research employs a qualitative approach, with data collected through observations, interviews with teachers and students, and documentation. The findings reveal that less interactive teaching methods, the lack of concrete learning media, and an unconducive learning environment are the main factors hindering students' understanding. Increasing student participation and facilitating their comprehension of geometric concepts can be achieved by implementing interactive media such as digital simulations, animated videos, and educational games. Thus, interactive media can enhance students' learning motivation and create a more enjoyable learning atmosphere. By integrating interactive media into the mathematics learning process, students are expected to become more actively engaged, focused, and able to understand geometric concepts more effectively.

This study aims to examine the effectiveness of using instructional media in enhancing the understanding of multiplication concepts in elementary schools. The research employs a library research method. The findings indicate that the use of instructional media in teaching multiplication in elementary schools is significantly more effective compared to conventional methods without media. Media such as Powtoon, PAKALILO (Papan Perkalian Kelinci Lompat), Papan BAPER (Batang Perkalian), and multiplication pockets based on the Indonesian Realistic Mathematics Education (PMRI) approach significantly improve students' understanding of multiplication concepts.

Measurement is an essential part of learning. It involves comparing an object with certain criteria or measures. In the context of education, measurement helps educators to understand the level of student achievement of the learning objectives that have been set. This study aims to analyze the ability of grade I elementary school students to understand the basic concepts of measurement, both from the cognitive, psychomotor, and affective aspects. Data collection was carried out through assessment instruments in the form of multiple choice questions and short fillings, practical activities using measuring instruments, and attitude observations during the learning process. The results showed that most students had understood the basic concepts of measuring standard and non-standard units, although there were still some errors in unit conversion and accuracy in measurement practices. This finding is an important basis for developing more contextualized and interactive measurement learning in the early grades of elementary school.

This study explores the application of the normal distribution in analyzing the height data of Mathematics Education students at FMIPA Universitas Negeri Medan in 2024. Employing a quantitative descriptive-analytic methodology, the research involved collecting primary data from 10 randomly selected students through a questionnaire-based survey. Descriptive statistical analysis revealed a mean height of 161.4 cm with a standard deviation of 8.79 cm. The median height was found to be 164 cm, while the mode was 150 cm, indicating a slightly skewed distribution. To assess the suitability of the normal distribution model, the Shapiro-Wilk test was applied, resulting in a W value of 0.921 and a p-value of 0.361, which exceeds the 0.05 significance level. This confirms that the sample data follow a normal distribution pattern. The findings were further supported through visual representation using histograms and analysis based on the empirical rule, which showed that approximately 68% of the students' heights fall within one standard deviation of the mean (152.81–169.99 cm). Additionally, probability calculations demonstrated that the likelihood of a student being 160 cm tall or shorter is approximately 43.64%. These results validate the effectiveness of the normal distribution as a tool for analyzing biological or physical characteristics, even in small sample sizes. However, the study acknowledges its limitation in terms of sample size and suggests that future research involve larger and more diverse populations to enhance generalizability. The study highlights the relevance of normal distribution in statistical modeling, particularly for educational and health-related data interpretation and decision-making processes.

This research built a simulation model of the cans line mobilization process yogurt in the Mosul dairy factory to see average waiting time per can and the average number of cans that remain in the queue before the filling process. Where the model was built using Microsoft Excel and queuing model used for this study is the kind of M/M/1: (FeFs,00,00). The results are that the time of waiting for each packet in the queue about (17) minutes and the average number of cans in the queue is (206) can of the total cans (1440 packqge) for that day.
 
 

This study aims to analyze the trends and development of research related to the use of Geogebra in improving the understanding of the concept of revival with a bibliometric approach. Data was collected from the Google Scholar database using the Publish or Perish (PoP) application in the 2020-2025 time span. The initial identification results found 393 documents, which were then filtered to obtain 11 documents worthy of analysis. The analysis was conducted with the help of VOSviewer software to map keywords, annual trends, and research topic density. The results showed that the number of publications increased significantly since 2021, with peaks in 2022 and 2023. Network, overlay, and density visualizations show that the topic of Geogebra usage is growing and diversifying, with a focus on interactive learning models, student abilities, and visual understanding of the concept of congruence. This research makes an important contribution to literature mapping and opens up opportunities for further research in the field of mathematics education technology.