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Measurement learning is a fundamental and applicable mathematical topic in everyday life, but it often causes learning difficulties for students, especially in understanding the meaning of units, relationships between quantities, and the conceptual measurement process. These difficulties are not only caused by students' limited cognitive abilities, but also by learning designs that do not fully facilitate social interaction and student learning development. This study aims to reconstruct the contextual didactic design in measurement learning by reviewing the role of social interaction and the Zone of Proximal Development (ZPD) in the student learning process. This study uses a qualitative approach with the type of Didactic Design Research (DDR). The research stages include analysis of the initial didactic situation to identify student learning barriers, implementation of contextual didactic design in measurement learning, and retrospective analysis of student responses as a basis for reconstructing the didactic design. Data were collected through learning observations, analysis of student work results, interviews, and learning documentation. Data analysis was carried out qualitatively by examining social interaction patterns, forms of scaffolding, and student movements in the Zone of Proximal Development. The results of this study indicate that understanding of measurement concepts develops through social interactions between students and between students and teachers within a meaningful learning context. Social interactions and scaffolding provided gradually can encourage students to move from actual abilities to potential abilities within the Zone of Proximal Development. Retrospective analysis indicates that reconstruction of the didactic design is necessary to refine the learning context, activity sequence, and scaffolding strategies to better align with students' learning characteristics. The reconstruction of the didactic design can reduce learning barriers and improve the quality of students' conceptual understanding in measurement learning. This research provides theoretical contributions to the study of social constructivism-based mathematics education and provides practical implications for teachers in designing measurement learning that is more responsive to social interactions and student learning development.

Problem solving in permutation and combination requires the ability to understand context, choose strategies, and perform calculation procedures accurately. Based on the analysis of students' answers, it was found that difficulties arose consistently at each stage of problem solving according to Polya, namely the problem understanding stage, the planning stage, the plan implementation stage, and the rechecking stage. In general, students' weaknesses are not only related to their understanding of permutation and combination concepts, but also to their inability to apply problem-solving steps systematically. The results of the study indicate the need for a learning approach that not only focuses on mastering formulas, but also strengthens problem literacy, the ability to identify relevant information, and the selection of solution strategies appropriate to the characteristics of the problem. In addition, the habit of reflection through reviewing the process and results of the solution needs to be developed consistently so that students are able to recognize mistakes and improve their accuracy in solving permutation and combination word problems in a more accurate, logical, and structured manner.

The problem faced is the decline in the performance of a 650 liter/minute centrifugal pump due to wear on components, especially the impeller, rolling bearings, and mechanical seals in supplying process water and clean water in industrial production systems. The planning objective is to obtain a maintenance schedule for a 650 liter/minute centrifugal pump for the operational period of 2026 and the ratio between maintenance costs and profits generated by the machine. The maintenance planning method includes collecting maintenance data from previous maintenance periods, reviewing centrifugal pump specifications, applying the inspection, replace, repair, and overhaul (IRRO) approach, estimating the age and price of components that are expected to be damaged, estimating the cost and duration of dismantling and installing components that have been repaired in accordance with the provisions of the requirements for usable components or replacement parts, scheduling maintenance and repairs, estimating maintenance and repair costs for the 2026 period, and determining the ratio of maintenance costs to profits. The planning results are in the form of a maintenance schedule for the 2026 period worth IDR 4,290,000,-, a maintenance cost to profit ratio of 7.44% and the implications indicate that the machine is still suitable for use and prospective for operations in the next few years.  

This study examines the bioethical and Sharia dilemmas arising from the production of slaughter-free meat through animal cell culture as a modern food innovation. Concerns regarding the halal status of the cell source, the use of culture media such as Foetal Bovine Serum, and ethical issues related to animal welfare necessitate an in-depth analysis of the halal status and moral implications of this technology. The research method employs a literature study with a descriptive qualitative approach, reviewing journals, books, and contemporary fatwas related to cultured meat, bioethics, and Islamic law. The results indicate that the Sharia aspect heavily depends on the cell source, the medium used, and the culture process, while the bioethical perspective highlights animal welfare, scientific transparency, and the moral responsibility of researchers. Furthermore, the acceptance among Muslim communities is significantly influenced by trust in halal certification bodies and the availability of transparent information. This study affirms the need for biotechnology-based halal standardization and the development of fully halal media and supporting materials to ensure the widespread acceptance of cultured meat in the future.

The banking sector is a strategic pillar that supports national economic stability and relies heavily on public trust. To maintain this legitimacy, banks are required to implement Corporate Social Responsibility (CSR), which is not only a moral obligation but also a legal duty as regulated in several laws such as Law No. 40 of 2007 on Limited Liability Companies and Law No. 21 of 2011 on the Financial Services Authority (OJK). This study aims to analyze the responsibility of OJK in managing Corporate Social Responsibility (CSR) funds based on the principles of Good Governance and to examine the role of banking institutions in maintaining public trust through transparent and accountable Corporate Social Responsibility (CSR) practices. This research employs a normative juridical approach by reviewing relevant legislation, literature, and regulatory documents. The results show that OJK holds normative, institutional, and legal responsibilities in supervising Corporate Social Responsibility (CSR) implementation to ensure compliance with the principles of transparency, accountability, independence, responsibility, and fairness. Meanwhile, banking institutions play a crucial role in ensuring that Corporate Social Responsibility (CSR) becomes an integral part of their sustainability strategy rather than a mere administrative formality. The application of Good Corporate Governance (GCG) has a positive impact on increasing public trust, as transparency and accountability in Corporate Social Responsibility (CSR) management strengthen the social legitimacy of banking institutions. Therefore, synergy between OJK and the banking sector in enhancing Corporate Social Responsibility (CSR) governance is the key to achieving an ethical and sustainable financial system.

This study examines the role of teachers as influencers in 21st-century education, particularly in developing students’ intelligence and character through the use of digital media and technology. The digital transformation requires teachers to serve not only as transmitters of knowledge but also as public figures capable of providing positive influence through digital behavior and communication. The purpose of this study is to analyze how teachers perform their roles as educational influencers and how this impacts students’ intellectual and character development. This research employs a literature study method by reviewing scientific sources such as books, articles, journals, and relevant research reports. The analysis was conducted using a descriptive-analytical approach to identify patterns, ideas, and strategies used by teachers in integrating character values and digital literacy. The findings indicate that teachers with strong digital competence and personal integrity are able to create positive influence through educational content, digital role modeling, and ethical communication. The implications highlight the importance of strengthening teachers’ digital literacy, educational policy support, and continuous professional training to create a digital learning ecosystem that is character-based, adaptive, and responsive to contemporary challenges.

The advancement of knowledge and technology in the 21st century has changed human life patterns and demands a transformation in the world of education to be able to prepare students to face global challenges. 21st-century education emphasizes the mastery of critical, creative, communicative, collaborative skills, and technological literacy needed in the digital era.The purpose of this study is to investigate the idea of 21st-century learning, relevant learning models, and the role of teachers as facilitators, innovators, and agents of change in the modern learning process. This study uses a library research strategy by reviewing numerous scientific materials linked to 21st-century competencies, Learning methods including cooperative Learning, Project Based Learning, Problem Based Learning, and Discovery Learning, as well as the TPACK framework as a basis for technology integration. The study’s findings show that 21st-century learning requires the implementation of a learner-centered approach and the planned use of technology to raise the standard of learning procedures and results. In addition, teachers have a strategic role in guiding to enable pupils to acquire higher order thinking abilities and adapt to changing times. The implications of this study emphasize the importance of strengthening teacher competencies and implementing innovative learning models is an attempt to raise educational standards in the global era.

This study explores the use of art and cultural practices as a means to instill Islamic values in the learning process of Islamic Religious Education. The background of this research arises from the challenges faced by Islamic education in the era of globalization, particularly the declining interest of students in Islamic-oriented activities and the strong influence of popular culture. Using a descriptive qualitative approach by reviewing relevant literature, the study finds that various forms of Islamic art such as nasheed, hadrah, calligraphy, and Islamic-themed drama can help students understand and appreciate religious values in a more engaging and meaningful way. These artistic activities serve as a bridge between Islamic teachings and everyday life, allowing values such as good character, piety, and love for the Qur’an to be internalized more effectively. However, the implementation still encounters several obstacles, including limited teacher competence and insufficient curriculum support. The study concludes that strengthening collaboration with the community, utilizing digital technology, and developing extracurricular programs are important steps to reinforce the application of Islamic values through art and cultural approaches within educational settings.

The global environmental crisis caused by plastic pollution has intensified in recent years, particularly in aquatic ecosystems such as rivers, lakes, and oceans, creating an urgent need for effective and sustainable solutions. This article explores the potential role of aquatic bacteria in degrading plastic polymers by reviewing the biological and molecular mechanisms these microorganisms use to break down complex synthetic materials. Special attention is given to key genes and enzymes involved in plastic degradation, including PETase and MHETase, which play a critical role in the decomposition of polyethylene terephthalate (PET). In addition, the article highlights advanced gene expression and analysis techniques, such as metagenomics, transcriptomics, and proteomics, to better understand bacterial activity and degradation dynamics in natural environments. The main problem addressed is the continuous and unsustainable production and consumption of plastics, which has resulted in extensive pollution of freshwater and marine systems, while conventional waste treatment methods remain largely ineffective. The objective of this article is to provide a comprehensive scientific review of biotechnological approaches used to analyze and utilize aquatic bacteria for plastic degradation, focusing on molecular aspects and environmental applications. Using a literature review method, studies published between 2018 and 2024 were analyzed to evaluate effective bacterial models, technological challenges, and future prospects. The findings indicate that aquatic bacteria offer promising potential as biological tools for mitigating plastic pollution through sustainable environmental strategies.

This study examines the legal protection provided to holders of Building Use Rights (HGB) on land under Management Rights (HPL) as interpreted in Supreme Court Decision No. 2160 K/Pdt/2017. The research aims to understand how civil law is applied to ensure legal certainty for HGB holders on HPL land and to strengthen insight into civil law principles used in resolving land-rights disputes. In the juridical context, land refers to the earth’s surface, while land rights are defined as authority over a specific, limited portion of that surface. Legal certainty, based on written regulations implementing the Basic Agrarian Law No. 5 of 1960, provides clarity regarding the rights and obligations of parties who own or control land. The study was conducted at the Sragen Police Resort using documentation methods—reviewing legal texts, literature, and supporting materials—along with field data obtained through interviews with relevant officers and individuals familiar with the case. The findings show that the Judex Facti of the West Java High Court made an error by declaring that no new issues required examination without giving adequate legal reasoning. The court also failed to address the objections submitted by the appellant, violating Article 50 paragraph (1) of Law No. 48 of 2009 on Judicial Power. Consequently, the Supreme Court annulled the previous decision, clarifying the legal consequences and strengthening the interpretation of HGB status on HPL land.

Digitalization has become a key factor driving global economic transformation, including the development of the Islamic economy in Indonesia. The purpose of this study is to evaluate the opportunities, challenges, and strategies for advancing the Islamic economy in the digital era through a literature-based research method. Information was gathered by reviewing documents, articles, and relevant literature related to the digitalization of the Islamic economy, including analyses of Sharia-compliant fintech, halal e-commerce, and digital Islamic banking.The findings indicate that digitalization offers numerous opportunities to enhance service efficiency, expand access to Islamic financial services, strengthen the capacity of MSMEs, and accelerate the growth of the halal industry. However, the digital transformation process also presents several challenges, such as low levels of digital and Islamic financial literacy, potential data breaches, the spread of misinformation, regulatory inefficiencies, and legal uncertainties associated with emerging technologies such as Sharia-compliant blockchain. In addition, digital inequality and ethical issues must be addressed to ensure alignment with the principles of maqāṣid al-sharī‘ah.This study highlights the importance of implementing a comprehensive Sharia-based development strategy through regulatory strengthening, education on digital ethics, enhanced supervisory functions, and collaboration between the government, academia, industry players, and society. With the right approach, digitalization can become a significant tool in building an Islamic economic ecosystem that is just, inclusive, and sustainable.

The development of modern business has given rise to various marketing models, one of which is Multi-Level Marketing (MLM). However, in practice, many parties misuse this system into a pyramid scheme, a business model that prioritizes profits from recruiting new members rather than from actual product sales. This phenomenon causes harm to society and raises moral as well as religious concerns in Islamic law. This study aims to analyze the recruitment strategies and compensation patterns used in pyramid schemes disguised as MLM, examine them from the perspective of Islamic economics, and provide a comparison with Multi-Level Marketing systems that operate in accordance with Islamic principles. This research employs a descriptive qualitative method with a literature study approach by reviewing various sources such as books, scientific journals, and relevant academic documents. The results indicate that the recruitment system and compensation pattern in pyramid schemes contain elements of gharar, tadlis, dharar, and zhulm, all of which contradict Islamic economic principles. Therefore, the public is advised to be more cautious in choosing MLM businesses, as such models are permissible in Islam only if they focus on selling lawful (halal) products, are conducted honestly and transparently, and provide fair benefits for all parties involved.

Childhood obesity has become an increasingly significant health and education problem in various countries, including Indonesia, influenced by unhealthy eating patterns, lifestyle changes, and low nutritional literacy within families. This article aims to examine the lack of balanced nutrition in obese early childhood from the perspective of family education as part of non-formal education. The research method used is a literature review by reviewing national and international literature related to nutrition, child growth and development, and the increasing trend of obesity. The results show that obesity has physical, cognitive, psychological, and social impacts that can hinder a child's holistic development. Parents play a crucial role in establishing healthy eating habits, monitoring food consumption, and fostering an active lifestyle. Improving nutritional literacy within families, synergizing with early childhood education institutions, and supporting public health policies are considered crucial to preventing the long-term risk of obesity. Therefore, family education about balanced nutrition is a crucial strategy in supporting optimal growth and development and creating a healthy and competitive generation of early childhood children.

The increasing public awareness of global environmental issues has encouraged the emergence of the green consumerism trend, or environmentally friendly consumption behavior, across various segments of society. This shift in consumption patterns occurs in response to growing environmental sustainability challenges and climate change, which demand consumers to be more responsible in selecting, using, and disposing of products. Consumers no longer consider only price and quality, but also the environmental impact of the products they consume. This study aims to analyze the concept of green consumers, identify the factors influencing green consumption behavior, and examine its implications for the modern business environment. The research method employed is a literature study (library research) using a qualitative descriptive approach, reviewing various sources such as scientific journals, books, research reports, and recent publications relevant to the topic of green consumerism. The results indicate that environmental awareness, sustainable lifestyle values, concern for ecological impacts, as well as social influence and digital media, are the main factors shaping green consumer behavior. Furthermore, the study finds that companies capable of adapting to the green consumption trend through eco-friendly product innovation, sustainable business practices, and the implementation of corporate social responsibility will gain a positive corporate image, increase consumer trust, and create competitive advantages in an increasingly environmentally conscious market.

Cross-national marriages between Indonesian citizens and foreign nationals generate complex legal issues concerning land ownership and citizenship. The Basic Agrarian Law (UUPA) and Citizenship Law No. 12 of 2006 have yet to harmonize their provisions regarding property rights within mixed-nationality marriages. This study aims to analyze the interrelation between land law and citizenship in cross-national marriages and evaluate their legal certainty. The research employs a normative-empirical approach by reviewing statutory regulations, case law, and interviews with land officials. The findings reveal a normative conflict between the prohibition of land ownership by foreign nationals and the constitutional right of Indonesian citizens married to foreigners to acquire joint property rights. Such disharmony leads to legal uncertainty and potential violations of property rights. The study concludes that reforming Indonesia’s land and citizenship law is crucial to accommodate international marriage dynamics and ensure legal certainty for all citizens.

Learning mathematics not only focuses on mastering concepts and calculation skills, but also requires creating a conducive learning environment so that students can think critically, logically, and creatively. A conducive learning environment plays a crucial role in fostering student motivation and active engagement, making the success of the learning process highly dependent on the strategies implemented by the teacher. This research aims to describe mathematics teachers' strategies in creating a conducive learning environment thru the application of active and contextual learning strategies. The method used is library research, which involves collecting and reviewing various scientific sources such as books, journals, and academic articles relevant to the research topic. The research results indicate that active learning strategies are able to increase student participation, strengthen reasoning abilities, and foster learning motivation. Teachers play an important role as facilitators, motivators, mediators, and evaluators, directly influencing the learning climate in the classroom. Contextual learning strategies like REACT (Relating, Experiencing, Applying, Cooperating, Transferring) have proven effective in connecting mathematical concepts with students' real-life experiences and creating a fun and meaningful learning environment. In addition, humanistic classroom management, the use of technology, and adapting learning to students' different abilities are supporting factors in achieving a conducive learning environment. The implications of this research indicate that the success of mathematics learning is not solely determined by the methods used, but also by the teacher's ability to build positive relationships with students and create an interactive, adaptive learning environment that optimally fosters students' potential development.

The employee leave application information system is a digital solution designed to simplify the process of submitting, approving, and managing leave within an institution. This internship project resulted in the development of a system called SiCuti, which was built using the Laravel framework with a MySQL database. The system provides two main roles: employees and administrators/supervisors. Employees can apply for leave according to their entitlements, such as annual leave with a maximum of 12 working days, maternity leave for 3 months, pilgrimage leave (Hajj) which can be taken once during their service period, as well as special leave for important reasons such as marriage or the death of an immediate family member, typically lasting 1–3 days. When applying, employees may also upload supporting documents and monitor the status of their applications through the leave status menu.Administrators or supervisors have broader authority, including reviewing the list of leave requests, approving or rejecting applications, and managing employee leave quotas to ensure compliance with regulations. In addition, administrators can track the complete leave history of employees through an integrated dashboard. This feature supports faster, more transparent, and accountable decision-making processes.The results of local testing indicate that SiCuti has the potential to increase efficiency in administrative leave processes that were previously carried out manually, making them faster, more transparent, and more structured. The interactive dashboard design also facilitates monitoring from both employees and administrators. With the implementation of SiCuti, it is expected that the leave management process can reduce the risk of human error, ensure data accuracy, and support transparency and accountability in human resource management once the system is fully deployed within the institution.

Social Studies (IPS) learning in elementary schools plays a crucial role in fostering students’ social awareness, which includes understanding social values, developing empathy, and participating responsibly in community life. However, in practice, Social Studies learning often remains theoretical and textbook-centered, making students’ learning experiences less meaningful and disconnected from real-life contexts. To address this issue, utilizing the surrounding environment as a learning resource offers an effective alternative by bringing real social situations into the learning process. This study aims to analyze the concepts, implementation, and impact of environmental utilization on enhancing elementary students’ social awareness. The research employed a Systematic Literature Review (SLR) method by reviewing relevant scholarly articles obtained from national and international databases such as Garuda, Google Scholar, and ScienceDirect, using the keywords “environment as a learning resource in Social Studies” and “students’ social awareness.” The findings reveal that the use of the surrounding environment as a learning resource promotes students’ critical thinking, empathy, and social concern through contextual and participatory learning experiences. Moreover, teachers play a pivotal role in designing project-based and field-observation activities that strengthen the internalization of social values. Therefore, Social Studies learning that integrates environmental resources is proven to be effective in shaping students’ social character from an early age and supports the realization of holistic, active, and life-oriented education.  

This research is inspired by the extraordinary success of the domestic animated film titled Jumbo, which managed to set a new record and trigger a wave of overwhelmingly positive sentiment responses on the Instagram social media platform. Its main focus is to provide a deep qualitative interpretation of audience sentiment data that was previously collected and quantitatively evaluated by Prasetia (2025) from 764 original comments, which were then filtered down to 221 samples. The approach applied involves secondary data analysis by reviewing the frequency of Prasetia's data through the lens of social identity theory and collective efficacy theory. The results of the analysis reveal that the prevalence of positive sentiment at 68.7% does not merely reflect a simple evaluation of the film but also serves as a fundamental expression of shared pride and in-group preference. Expressions of support that emphasize appreciation for the achievement and national pride over the work of local creators act as a tool for strengthening social bonds, reinforcing the national identity linked to achievements in the film sector while also demonstrating the audience's collective belief in the potential of the domestic animation industry (mastery experience). Practically, the recommendation for local film promotion strategies is to highlight narratives about shared accomplishment and national pride to build audience loyalty and continuous interaction in the digital environment.

Mathematics learning demands optimal student activity, concentration, and participation. However, many students still exhibit a passive attitude during the learning process, resulting in learning outcomes that have not reached the expected level. This article aims to analyze various effective classroom management strategies for fostering enthusiasm for learning and increasing student participation in mathematics learning. This study uses a library research method by reviewing various scientific sources, such as journals, academic books, and relevant research reports. The results of the study indicate that effective classroom management plays a crucial role in creating a conducive, interactive, and student-centered learning environment. Teachers function not only as transmitters of material but also as facilitators and administrators capable of building positive social relationships and motivating students to actively think and participate. Preventive, curative, and repressive classroom management strategies have been proven to improve student focus, motivation, and learning outcomes, especially when integrated with learning approaches such as discovery learning, teacher-centered learning, and the use of creative methods like squad games and block systems. Thus, adaptive and innovative classroom management is key to realizing participatory, enjoyable, and meaningful mathematics learning for the development of students' overall potential.