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The development of the digital economy has driven increased customer interaction through online chat services, making customer satisfaction a key factor in business success. Response speed and chat service quality are two important aspects in shaping the customer experience, but previous research has tended to examine them separately. This study aims to analyze the influence of online chat services and response speed on customer satisfaction partially and simultaneously. The method used is a qualitative approach with a literature review of 12 scientific articles from 2020–2025 obtained from academic databases such as Google Scholar and SINTA. The analysis technique used is descriptive-critical through the identification, comparison, and synthesis of previous research findings. The results show that online chat services have a positive effect on customer satisfaction, primarily through interaction quality such as information accuracy, ease of use, and problem-solving ability. Response speed has also proven to be an important determinant, where a fast response significantly increases customer satisfaction. However, speed without quality has the potential to decrease satisfaction. The discussion shows that the two variables have a complementary and inseparable relationship. Online chat services function as a medium for interaction, while response speed is a quality attribute that determines the effectiveness of the service. Therefore, the integration of both in one model is the main contribution of this research in filling the literature gap, especially in the context of e-commerce in Indonesia.

This study aims to analyze students’ mathematical reasoning abilities in quadratic function material through the use of Desmos. The research employed a qualitative descriptive approach using a case study and usability testing method. Data were collected through post-tests and interviews involving students’ responses in solving quadratic function problems. The analysis focused on several indicators of mathematical reasoning, including procedural skills, conceptual understanding, and analytical ability. The results show that students generally demonstrate adequate procedural reasoning, particularly in substitution and computation tasks. They are also able to relate algebraic representations to geometric interpretations, such as determining intercept points and analyzing the direction of parabolas. However, limitations were found in conceptual understanding, especially in identifying graph characteristics without relying on procedural steps. The use of Desmos significantly supports the development of students’ mathematical reasoning by providing real-time visualization, facilitating exploration of function parameters, and enabling verification of results. Overall, Desmos contributes to enhancing procedural, conceptual, and analytical dimensions of mathematical reasoning, although its effectiveness depends on proper instructional design.

Biology learning in Indonesia is still predominantly teacher-centered, limiting students’ opportunities to actively develop critical thinking, creativity, collaboration, and other 21st-century competencies. Students often receive information passively, resulting in low engagement and limited ability to apply concepts in real-life contexts. Therefore, innovative learning models are needed to support more meaningful and student-centered learning. This study aims to review the implementation of Project-Based Learning (PjBL) in Biology education and analyze its contribution to the development of students’ 21st-century skills. The study employed a literature review method by analyzing 20 research articles published between 2022 and 2026. Articles were obtained through Google Scholar searches and selected based on relevance to Biology education, focus on PjBL implementation, and open-access availability. Data collection involved identification, screening, selection, and documentation of related studies, while data analysis used a qualitative descriptive approach. The findings indicate that PjBL effectively improves students’ cognitive achievement, conceptual understanding, scientific literacy, creativity, and critical thinking skills. In addition, PjBL enhances collaboration, communication, problem-solving abilities, learning motivation, and life skills through contextual and authentic project activities. Students become more actively involved in investigating real-world problems, designing solutions, and producing meaningful learning outputs. Furthermore, the integration of STEM approaches, digital media, blended learning, and Culturally Responsive Teaching (CRT) strengthens the effectiveness of PjBL in Biology learning. Overall, PjBL is highly relevant for supporting the Merdeka Curriculum and improving the quality of Biology education in developing 21st-century competencies.

Being able to solve problems is a key part of learning math. Many students still haven't fully understood this skill, especially when it comes to Statistics. This happens because the teaching methods haven't fully supported students in being more involved, and technology isn't being used as effectively as it could be in the lessons. So, this study was done to look at how using the Discovery Learning method along with the Photomath app affects students' ability to solve math problems. The study took place at SMPN 2 Gondangwetan during the 2024/2025 school year. It used a quasi-experimental method with a nonequivalent control group setup. The study included two groups of eighth-grade students, with each group having 30 students. Class VIII-A was the control group, and Class VIII-B was the experimental group. Data was gathered using written exams given before and after the teaching program. The pretests showed that the data followed a normal distribution but had unequal variances, so the Mann–Whitney U test was chosen to check the hypothesis. The analysis found a significance level of 0.003, which is below 0.05, showing there was a true difference between the two groups. The biggest progress was seen in the experimental group, especially in the areas of evaluating and making conclusions, which went up from 3% to 81%. So, it's clear that using the Discovery Learning model along with the Photomath app has a big positive impact on helping students improve their math problem-solving skills.  

The criterion for students who have been able to think critically is when they can think systematically, besides having awareness in thinking, then they can see the difference between mistakes and truths. The purpose of this research is to measure the extent of students' ability to think critically on the completion of Higher Order Thinking Skill (HOTS) questions, especially in the subject of mathematics and social arithmetic material for grade VII students. This research is classified as qualitative descriptive research. The subjects involved were 6 students in grade VII D SMPN 3 Ngawi. The method used is qualitative descriptive with data analysis techniques using models from Miles & Huberman. Meanwhile, at the time of data collection, the instrument was in the form of 2 HOTS questions that were in accordance with the research subject. In data collection using tests and interviews, tests are used to measure cognitive competence while interviews are used as a follow-up to explore in depth related to students' answers. Based on a series of research processes, it can be proven that the students studied are divided into 3 categories of ability, namely low, medium, and high.

This study aims to determine the ability of students' conceptual understanding after the application of the Project Based Learning (PjBL) model on pyramid material in class VII of Muhammadiyah Pagar Alam Middle School in the 2025/2026 Academic Year. The subjects in this study were 30 students using the pre-experimental design method of one group posttest only type. Data collection techniques used in this study include tests and documentation. The data analysis technique is a quantitative descriptive analysis of all collected research data. Starting the stages carried out after learning using the Project Based Learning (PjBL) model, the percentage per indicator of students' conceptual understanding was obtained with the achievement of: indicators restating the concept of 59.12% indicators providing examples and non-examples of 78.33, and problem solving indicators of 83.06%. So it can be concluded that the use of the Project Based Learning (PjBL) model is effective on the conceptual understanding ability of class VII students of Muhammadiyah Pagar Alam Middle School in the 2025/2026 Academic Year with an average percentage reaching 75.91 which is in the good category.

This study aims to determine the abillity of students’ conceptual understanding of mixed fractions after the application of the PhET Colorado application in class VII of Muhammadiyah Pagar Alam Middle School in the 2025/2026 Academic Year. The subjects in this study were class VII.2 with 30 students with an average of 77. This study uses a pre-ekperimental design method one group pretest-posttest. Data collection techniques used in this study include tests and documentation data analysis techniques are stages carried out after all research data is collected. Through the PhET Colorado application, the percentage per indicator was obtained, the indicator restating the concept with an achievement of 63,50%, the indicator mathematical representation with an achievement of 74,78%, the indicator problem solving with an achievement of 95,00%, therefore the average reached 77,78%. So it can be in mixed fractions material on the ability of students’ conceptual understanding in class VII of Muhammadiyah Pagar Alam Middle School in the 2025/2026 Academic Year.

The industrial revolution 4.0 has brought rapid advances in technology, one of which is artificial intelligence (AI). AI has the ability to imitate the human thought and action process in solving various problems. However, the implementation of AI raises legal problems related to responsibility for the negative impacts caused, such as cybercrime, information manipulation, privacy violations, and misuse of technology. Indonesia, as a country based on law, is faced with the challenge of regulating AI to be in line with technological developments. Currently, legal regulations in Indonesia do not specifically regulate the legal responsibility of AI. Positive laws, such as the Civil Code and the ITE Law, can be used interpretively, but are not enough to address the complexity of AI. Legal responsibility related to AI is debatable, whether it is imposed on the developer, owner, or user of AI. In addition, AI does not have a “mens rea” in criminal law, so that unlawful acts are more relevant to be imposed on the responsible human. To overcome this problem, legal reform or the creation of special regulations that comprehensively regulate AI are needed. These regulations must include privacy protection, data security, and criminal and civil liability due to the use of AI. With a clear legal framework, the risk of AI misuse can be minimized and its use can be optimized for the welfare of society.

In the era of information and globalization, critical thinking skills have become an essential competence for children, including students in Islamic boarding schools. These skills include the ability to ask questions, seek and evaluate evidence, compare alternatives, and solve problems logically. Islamic boarding schools inherently provide a disciplined environment grounded in religious values that supports the development of critical thinking. However, observations at Raudlatul Hanan Islamic Boarding School reveal several challenges, such as low social sensitivity, limited constructive conflict resolution, and the absence of consistent critical thinking habits. These conditions have the potential to hinder students’ adaptability and problem-solving abilities in the future. To address these issues, a program entitled “Optimizing Children’s Critical Thinking Character through the Internalization of Socio-Environmental Sensitivity Values” was implemented using a Participatory Action Research (PAR) approach. This approach actively involved students, ustadz/ustadzah, and Islamic boarding school administrators from problem identification through planning, implementation, and reflection. The activities included character education seminars, critical discussions, group competitions, and interviews aimed at fostering social sensitivity, reducing exclusive attitudes, and strengthening critical thinking skills from an early age. The results indicate high and enthusiastic student participation throughout all activities, leading both students and administrators to hope that the program will be implemented sustainably on an annual basis.

The ability to analyze ethical and health law issues is one of the learning outcomes that must be mastered by students of the Public Health Study Program. Over the past two years, the implementation of lectures has been predominantly based on problem-based learning; however, most student learning outcomes have remained in the “not yet achieved” category, including in completing assignments related to ethical and health law problem solving. This study aims to compare students’ problem-solving abilities between the implementation of project-based learning and problem-based learning. The research was conducted in the Public Health Study Program at Universitas Jambi involving first-semester students enrolled in the Ethics and Health Law course. The research employed a quasi-experimental design involving 200 students, with 100 students assigned to the experimental group and 100 students to the control group. The instruments used were assessment sheets and observation sheets. Data collection was carried out twice, before and after the implementation of the two learning models. Data processing and analysis were conducted using an independent t-test.The results of the study indicate an improvement in students’ problem-solving abilities through the implementation of project-based learning. Project-based learning contributes to strengthening students’ perseverance and problem-solving skills and is therefore recommended for implementation in all courses at higher education institutions.

Learning is the process of children getting to know knowledge that aims to increase knowledge as a basis for forming behavior. The learning process is carried out so that children experience behavioral changes and gain an overall improvement in knowledge, skills, and attitudes. Learning is very closely related to daily life, therefore it is important for children to learn continuously, one of which is through learning mathematics. Mathematics learning has a very important role in the sustainability of children's education because mathematics is one of the fundamental non-physical tools in the world of education and daily life. Through mathematics learning, children are trained to think logically, systematically, critically, and creatively in solving various problems. In addition, mathematics helps children solve calculation problems that are often encountered in daily activities, such as counting money, measuring length, time, and distance, and interpreting simple data. Mathematics learning also plays a role in developing the ability to reason and make appropriate decisions. Therefore, mathematics learning is a subject that must be followed because it has a great influence on thinking skills, learning independence, and children's readiness to face life challenges and scientific development in the future.

The rapid development of digital technology highlights the importance of introducing computational thinking skills from an early age, including at the elementary school level. One effective approach to introducing basic programming concepts is through block-based coding learning media that are visual, interactive, and engaging. This community service activity aimed to improve elementary school students’ understanding and interest in basic coding through hands-on training using block-based coding media. The program was implemented with sixth-grade students at Yayasan Kemala Bhayangkari 1 Medan. The activity employed a hands-on training approach consisting of several stages, including an introduction to basic coding concepts, familiarization with the Blockly Games interface, and practical exercises involving puzzle and maze challenges designed to develop logical thinking, sequencing, and problem-solving skills. The evaluation was conducted through direct observation of student participation and assessment of students’ ability to complete the given challenges. The results demonstrated that the use of Blockly Games effectively increased students’ enthusiasm, active engagement, and understanding of basic programming logic. Students who initially perceived programming as difficult showed greater interest and confidence due to the colorful, visual block-based instructions that were easy to understand and enjoyable. This community service activity is expected to serve as an effective introductory model for coding education and to support the development of digital literacy among elementary school students.

Education in the modern era requires students not only to master cognitive knowledge, but also to have the ability to think critically, analytically, creatively, and problem solving skills independently. Therefore, the application of the Problem Based Learning (PBL) model and the Learning Strategy for Improving Thinking Ability (SPPKB) is considered relevant and ideal in the context of Christian Religious Education (PAK) to integrate faith values with the reality of daily life. This study uses a literature study method by examining scientific journals, books, and academic articles to analyze the definition, essence, characteristics, and steps of PBL which include the introduction of authentic cases, problem solving, investigation planning, independent learning, solution synthesis, presentation of results, and reflection. PBL has proven to be effective in increasing learning motivation, collaboration, and internalization of Christian moral values, although it has limitations in the relatively long time requirement and the demands of teacher competence as facilitators. Meanwhile, SPPKB emphasizes intellectual stimulus, exploration of ideas, data processing, in-depth analysis, and metacognitive reflection to form a systematic and independent mindset in dealing with religious ethical issues. These two student-centered learning strategies complement each other in forming students who are dynamic, reflective, critical, and responsible as Christian personalities through flexible and contextual learning adaptations in PAK.

. Eco-print is a technique for printing leaf and flower motifs on fabric by utilizing natural materials derived from the surrounding environment. This technique is not only environmentally friendly but also encourages artistic exploration and the sustainable use of natural resources in art education. The method applied in this activity is a project-based learning approach, in which students are actively and collaboratively involved throughout the entire process of artistic creation. The learning stages include the introduction of eco-print concepts, the collection and selection of natural materials, color experimentation, the motif printing process, and the presentation and reflection of the final artworks. The results indicate that students experience improvements in creativity, particularly in imaginative ability, willingness to experiment, problem-solving skills, and aesthetic sensitivity to form and color. In addition, this learning activity contributes to strengthening environmental awareness, care for nature, and the introduction of local wisdom through the use of natural materials. Therefore, the implementation of eco-print and natural dye art has proven to be an effective and innovative learning medium that supports the holistic development of students’ creativity, character, and environmental awareness.

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.

This study examines the influence of work discipline, training, and motivation on employee performance at PDAM Tirta Ayu, Tegal Regency. In a public service organization such as PDAM, employee performance is crucial to ensure customer satisfaction and strengthen institutional competitiveness. A quantitative survey method was used with questionnaires distributed to all 115 employees using a saturated sampling technique, as the entire population was included. The independent variables analyzed were work discipline (attitude, compliance with rules, responsibility), training (materials, methods, instructor competence, duration, facilities), and motivation (intrinsic and extrinsic). Employee performance, as the dependent variable, was measured using indicators of work quality, work quantity, teamwork, and problem-solving ability. The data were processed through multiple linear regression to assess simultaneous and partial effects. The research findings revealed that work discipline, training, and motivation each have a positive and significant impact on employee performance, but for training has a positive and insignificant effect, this is shown by the significant results of each significant level for work discipline sig value = 0.000 (<0.05), training sig value = 0.632 (>0.05) and motivation with sig value = 0.000 (<0.05). These results highlight the importance of strengthening employee discipline, implementing well-structured and sustainable training programs, and fostering sustainable motivation strategies. This research provides practical implications for PDAM Tirta Ayu management in designing policies to improve overall employee performance, thereby improving service quality and organizational competitiveness.  

This community engagement program aims to strengthen collaborative governance and social advocacy in Erbil through a data-driven approach that empowers both public institutions and local communities. The initiative responds to the growing need for evidence-based decision-making, particularly in urban areas where socio-economic disparities, limited data literacy, and fragmented public–community communication hinder sustainable development efforts. Using participatory mapping, digital data collection, and community workshops, the program integrates statistical tools and informatics-based solutions to support transparent governance practices. Activities include capacity-building sessions, community needs assessments, data visualization training, and stakeholder forums designed to enhance cooperative problem-solving. Findings show that community members developed increased awareness of data-based decision processes, while local institutions improved their ability to integrate citizen input into planning. Participant feedback confirms higher trust levels, better communication pathways, and enhanced motivation to co-design development initiatives. The program demonstrates that data-driven social advocacy can strengthen relational accountability and foster long-term collaborations between stakeholders. This model offers a scalable and adaptable framework for cities in the Kurdistan Region seeking to implement more inclusive and sustainable governance strategies. Overall, the program contributes to the advancement of participatory governance by embedding statistical literacy and digital tools into community-centered development processes.

This study aims to analyze the basic skills of 21st-century teachers that play a role in creating creative and collaborative learning. Technological developments, changes in student characteristics, and modern educational demands place teachers in the role of facilitators who must master critical thinking, creativity, communication, collaboration, and the ability to integrate technology into the learning process. The results of the study show that mastery of these skills can increase student activity, motivation, and interaction, while also encouraging problem-solving and cooperation skills. In addition to pedagogical aspects, teachers' psychological readiness and attitudes toward the use of technology, including artificial intelligence, also influence the effectiveness of its application in the classroom. This study emphasizes the importance of continuous training, the development of relevant learning media, and institutional support so that teachers can adapt to the changes of the digital era. Thus, the basic skills of 21st-century teachers are an important foundation in realizing innovative and relevant learning for the needs of students.  

Negotiation is a strategic communication process in which multiple parties work to reconcile differences and reach mutually beneficial agreements through the exchange of information, interests, and viewpoints. Although traditional theories emphasize analytical elements such as developing a BATNA, crafting offer–counteroffer strategies, and employing persuasive framing, recent research underscores the growing importance of interpersonal competencies in shaping negotiation success. Through a qualitative literature-based approach, this study explores how empathy, assertive communication, and emotional regulation influence negotiation outcomes, examines their relevance in digital negotiation environments, and proposes an integrated training framework for professionals and entrepreneurs. The findings reveal that empathy strengthens a negotiator’s ability to interpret emotional cues, identify underlying concerns, and build trust, thereby minimizing miscommunication. Assertive communication supports clear expression of interests and boundaries while maintaining respect, which enhances collaborative problem-solving. Emotional regulation promotes composure and cognitive flexibility, particularly in high-pressure interactions. In technology-mediated negotiations conducted via email, messaging platforms, or virtual meetings, these skills must be adapted due to limited physical cues and higher risk of misinterpretation, requiring explicit wording and intentional emotional management. The proposed model incorporates empathy training, assertive communication development, emotional regulation practices, and digital negotiation skills to cultivate adaptive and emotionally intelligent negotiators.

In the learning process, there are various important aspects that must be considered, especially by teachers as transmitters of knowledge. The success of learning depends heavily on the teacher's ability to manage the classroom to create a safe, comfortable, and enjoyable learning atmosphere. Therefore, teachers need to choose the right learning method so that learning objectives can be achieved effectively. One method that can be used is Outdoor Learning, which is learning outside the classroom that provides opportunities for students to develop talents and creativity more broadly through direct experience in the open air. Management of the learning environment is also a crucial factor in supporting learning success. Several things that need to be considered include understanding the nature and development of student intelligence, getting to know students individually, utilizing student behavior in organizing learning, and developing critical thinking, creativity, and problem-solving skills. In addition, teachers need to create an attractive classroom, utilize the environment as a learning resource, provide constructive feedback, and differentiate between students' physical and mental activities. The learning environment itself consists of indoor and outdoor environments. The indoor environment includes school facilities such as classrooms, libraries, laboratories, and auditoriums. Meanwhile, the outdoor environment includes places outside the school that can be used as learning resources, such as museums, mosques, monuments, and fields. Prospective teachers need to understand the importance of managing the learning environment and understand the various types and benefits of learning environments to support an effective learning process.