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The community service aims to improve the understanding of grade 1 students of SDN 173635 Parparean II on the concept of addition through the use of diagram tables 1-9. This service activity was carried out by KPPM students of HKBP Nommensen University Medan in Parparean II village, Porsea District, Toba Regency. The methods used in this service are observation and evaluation test. The results of the service showed that the use of diagrammatic tables improved students understanding of the concept of addition. Students stated that the use of diagrammatic tables helped them understand the material better. By looking at the numbers in the 1-9 table, they can easily follow the addition steps and understand the relationship between numbers. This shows that the visual aids such as diagrammatic tables are very effective in supporting the teaching and learning process, especially for basic mathematics concepts that are often a challenge for students and the use of this learning method also creates a more interesting and interactive classroom atmosphere. Through this service can make an important contribution in improving the quality of education. The use of table diagrams can be expanded in various school, so that they can understand how to implement this method into the learning process in the future.

Teachers in education play a significant role in the quality of classroom learning. Although teachers are not the only factor influencing educational success, they are an essential component of the overall educational process. This study aims to assist teachers in improving basic literacy and STEAM (Science, Technology, Engineering, Art, and Mathematics) skills in early childhood education at the RA Al-Mahir Foundation. The research seeks to explore the improvement of basic literacy and STEAM in early childhood learning, the stages and implementation of these improvements, and the challenges teachers face in enhancing literacy and STEAM at the foundation. The subjects of this study were classroom teachers and school principals. This research adopts a descriptive qualitative approach, collecting data through observation, interviews, and documentation. The results show that there are two key aspects: first, teacher performance in improving basic literacy and STEAM at the RA Al-Mahir Foundation has been excellent, particularly through the use of methods like reading, singing, and experimental play. Second, the activities aimed at improving literacy and STEAM have been effective and well implemented. The learning process at the RA Al-Mahir Foundation is running smoothly, with teachers successfully increasing children's interest in literacy and STEAM. This includes improved reading interest, focus during reading and experimental activities, politeness in the learning process, and good behavior, all contributing to a positive learning environment.

This study aims to identify and analyze language errors in the Discrete Mathematics book, which may affect the clarity and comprehension of the presented material. The analysis focuses on capitalization, punctuation, word usage, and sentence structure. The research employs a qualitative descriptive method with a literature study approach. Data were collected through in-depth reading and recording of linguistic errors found in the book's text. The results indicate that errors such as improper capitalization, punctuation mistakes, inaccurate word choices, and ineffective sentence structures can hinder the understanding of discrete mathematics concepts. Therefore, linguistic improvements are necessary to enhance the book's effectiveness and quality as a teaching material. These revisions are also expected to increase the book’s academic credibility as a reference for students and scholars.

This study aims to identify and analyze language errors in the Discrete Mathematics book, which may affect the clarity and comprehension of the presented material. The analysis focuses on capitalization, punctuation, word usage, and sentence structure. The research employs a qualitative descriptive method with a literature study approach. Data were collected through in-depth reading and recording of linguistic errors found in the book's text. The results indicate that errors such as improper capitalization, punctuation mistakes, inaccurate word choices, and ineffective sentence structures can hinder the understanding of discrete mathematics concepts. Therefore, linguistic improvements are necessary to enhance the book's effectiveness and quality as a teaching material. These revisions are also expected to increase the book’s academic credibility as a reference for students and scholars.

This study aims to determine the effect of emotional intelligence on student learning outcomes in class X mathematics at Muhammadiyah Maumere Private High School. The population of this study were students of class X IPA I and IPA 2, totaling 39 students. The sample in this study consisted of 39 students. Data collection was carried out by distributing questionnaires related to emotional intelligence on the results of learning mathematics in class X SMA Muhammadiyah Maumere Private High School Based on the results of the analysis with a significant level of 5%, it can be concluded (1) There is a significant effect of emotional intelligence for the experimental class on mathematics learning outcomes (2) There is an insignificant effect of emotional intelligence for the control class on mathematics learning outcomes for Muhammadiyah Maumere Private High School students.

Community Service Activities (PEMA) carried out by Mathematics Education students at the North Sumatra State Islamic University in Padang Brahrang Village aim to foster a sense of togetherness through various competitions to commemorate the 78th Indonesian Independence Day. This activity involves the active participation of the local community, including children, teenagers and adults, in various traditional competitions such as tug of war, sack races, pillow hitting and areca nut climbing. The method used is a participatory approach, where students collaborate with the community in planning and implementing activities. The results of this activity show that through competition and social interaction, the sense of togetherness and solidarity among the community is increasing. Apart from that, this activity also strengthens the spirit of nationalism and mutual cooperation. Thus, the celebration of Independence Day is not only an event for entertainment, but also a momentum to strengthen social relations and increase awareness of the importance of unity in social life.

This type of research is an experimental research involving two experimental groups. The sample in this study was class XII.  1 as experimental class 1 and class XII. 2 as experimental class 2. Data were collected using questionnaires, tests, and observation sheets. The data were then analyzed descriptively and two-way analysis of variance (ANOVA) and continued with a post hoc test. The results of the study showed that (1) the average mathematics learning achievement of students using the Talk Stick cooperative learning model was 88.7 out of an ideal value of 100 with a very high category, (2) the average mathematics learning achievement of students using the Example Non-Example cooperative learning model was 87.6 out of an ideal value of 100 with a very high category, (3) there was a significant difference in mathematics learning achievement between students with high, medium, and low learning motivation with a significance of 0.001, and (4) there was no interaction between the cooperative learning model and motivation on mathematics learning achievement with a significance of 0.306.

According to (Aufa, 2016: 232) Mathematics is one of the subjects taught at every level of education, from early childhood education to higher education. Mathematics is also a science that underlies the development of science and technology, so that mathematics is seen as a structured and integrated science, the study of patterns and relationships, and the science of thinking to understand the world around us. From the explanation of Ansari and Aufa, it can be concluded that mathematics is one of the subjects taught in every education which is useful for helping to clarify and simplify abstract situations through language and mathematical ideas so that it makes it easier to understand problem solving that exists in everyday life.

This study aims to determine the achievement of students‘ critical thinking skills in solving HOTS-based Mathematics problems in terms of students’ learning styles at SD Negeri Gembira, Nangahale Village. This type of descriptive qualitative research aims to present in-depth information about a subject. The research was conducted at SD Negeri Gembira Desa Nangahale in even semester on 10 April-17 May 2023. Primary data sources were obtained from observation. While secondary data sources were obtained from tests, questionnaires, and interviews. Data collection techniques using tests, learning style questionnaires and interviews. Data analysis in this study used miles and huberman model data analysis, namely data presentation, data reduction and conclusion drawing. The results showed that subjects with visual learning styles revealed that the thinking process on each indicator of critical thinking ability smoothly so that the subject could solve the problem correctly. Subjects with auditory learning styles reveal well the critical thinking process on each indicator of critical thinking ability.

This research aims to find out how to develop animated video learning media to improve the mathematical problem solving abilities of class VI students. This research is based on several problems, namely students who do not understand the discussion of learning material because mathematics is considered boring and it is difficult to memorize formulas. This made students unable to solve problems in the learning process. This research used research method and development using 4D research model. The sample of this research consisted of 25 students, with the first step not using animated videos and the second step using animated videos. The research instruments used in this research were tests (essays) and questionnaires. The research results showed that the feasibility level was 92% in the "very valid" category, the practicality level was 92% in the "very practical" category, and the effectiveness level was 88.52% in the "effective" category. These results can also be seen from the pretest with an average value of 34 and posttest with an average value of 92, so the average N-Gain Score was 88.52%. So, it can be concluded that the development of animated video learning media can improve the Mathematical problem solving abilities of 6th Grade of Elementary School students.

This community service aims to improve the numeracy skills of elementary school students in Marendal Village through contextual mathematics-based training. The methods used in this program are lectures, discussions, and practice questions based on everyday problems. The evaluation results show an increase in students' understanding of basic mathematical concepts and an increase in their learning motivation. This activity is expected to be a model for numeracy literacy improvement programs in other areas.

This study examines the integration of Islamic Religious Education and Mathematics within a digital learning environment and its potential role in shaping students' character in the context of Society 5.0. The study employs the Systematic Literature Review (SLR) method to analyze existing studies on the integration of these two subjects through digital learning platforms. The results of the literature review reveal various models of integration, highlighting the role of technology in facilitating the merging of religious education with mathematical thinking. Additionally, this study evaluates the impact of this integration on the development of students' moral and ethical values, as well as the enhancement of their critical, logical, and creative thinking skills. The findings suggest that the integration of Islamic Religious Education and Mathematics not only improves academic learning but also plays a crucial role in character building, fostering values such as responsibility, honesty, and respect. Despite its great potential, this integration faces challenges such as limited technological infrastructure and teacher readiness. This research provides insights into the practical implications of this integration in educational practice in the digital era.  

This study aims to (1) describe the characteristics of e-LKPD based on realistic mathematics education on system of linear equations with three variables oriented towards critical thinking skills and self-efficacy of vocational school students, (2) describe the feasibility of e-LKPD based on realistic mathematics education on system of linear equations with three variables oriented towards critical thinking skills and self-efficacy of vocational school students in terms of validity,  practicality and effectiveness. This type of research is research and development (Research and Development) with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). The research subjects were 34 students of class X TKP SMKN 2 Tarakan. In this research, One Group Pretest - Posttest Design was used. The research instruments used were validation sheets, practicality assessment sheets by teachers and students, learning implementation observation sheets, critical thinking ability tests and self-efficacy questionnaires. The results of the research show: (1) the e-LKPD developed contains characteristics found in the RME approach to the material of on system of linear equations with three variables oriented towards critical thinking skills and self-efficacy. The characteristics contained in RME-based e-LKPD include integrated learning, use of context, mathematization and construction processes and interactivity. (2) the RME-based e-LKPD developed meets the criteria for feasibility in terms of validity aspects with a percentage of feasibility according to material experts of 93.4% and media experts of 98.9% with the validation result criteria being very feasible; practicality with a very practical category based on the results of student and teacher responses; effectiveness based on critical thinking skills with classical completeness of students reaching 82.4%, the results of the T-test paired samples-test with a significance level of 5% obtained that there was an influence on students' critical thinking skills after treatment using RME-based e-LKPD, the N-Gain result was 0.73 with a high category, and the effectiveness of e-LKPD on self-efficacy with an increase in each self-efficacy indicator,  the N-Gain result was 0.3 in the moderate category, and the results of the Wilcoxon test on self-efficacy data with a significance level of 5%, it was obtained that there was an influence on students' self-efficacy after treatment using RME-based e-LKPD.

This study aims to determine the effect of the application of multiplication board media in mathematics learning on students' understanding of multiplication concepts in grade IV of elementary school. This study uses a qualitative approach with a descriptive method conducted in several elementary schools. Data were collected through observation, interviews with teachers and students, and documentation of learning activities. The results of the study indicate that the use of multiplication board media can improve students' understanding of multiplication concepts. Students who initially had difficulty memorizing multiplication tables showed significant progress after using this media, as seen from their ability to work on multiplication problems faster and more accurately. In addition, the use of this media also increased student involvement and motivation in learning. Teachers reported that the multiplication board media made it easier for them to explain multiplication concepts in a more concrete and visual way, and increased student participation in class. Based on these results, it can be concluded that the application of multiplication board media in mathematics learning can be an effective alternative to improve students' understanding of multiplication material. This media not only makes mathematics learning more interesting, but also strengthens the basic concepts of mathematics taught in elementary school.

Many students have difficulty in learning mathematical concepts, especially in the material of curved-sided spatial figures, in addition, knowledge of regional culture is still lacking. This is due to the limited use of teaching materials in learning which has an impact on students' interest in learning. The purpose of this study is to develop teaching materials in the form of e-modules with an ethnomathematics approach to curved-sided spatial figures that are suitable for use, as an alternative to other teaching materials that can be used in learning. The type of research method used is the Research and Development (R&D) method with a 4D development model (Define, Design, Develop, Disseminate). The subjects of this study were grade IX students at SMPN 2 Kaledupa. The instruments used to measure the validity and practicality of the teaching materials developed were in the form of a validation questionnaire from material experts and media experts and a student response questionnaire. The data obtained from measuring validity and practicality were then processed using quantitative and qualitative descriptive analysis. The results of the research on the development of teaching materials with an ethnomathematics approach show that the developed learning e-module is declared feasible to use based on the assessment results of the material expert and media expert validators. The average score percentage obtained from the material expert validator is 89.06% with very valid criteria. While the average score percentage from the media expert validator is 86.45% with very valid criteria. In addition, the learning e-module with an ethnomathematics approach is also declared practical to use based on the results of the student response assessment. The average percentage of the overall student response assessment score is 89.93% with very practical criteria.

The mathematics learning process at high school level often faces challenges in terms of difficulties in understanding concepts. Conventional learning media is not interesting and interactive enough so it is less effective in understanding the material. This research aims to produce learning media using PowerPoint on the subject of statistics for class X. The development model used is the R&D model with the ADDIE development pattern, which consists of five stages: analysis, design, development, implementation and evaluation. The data collection technique used was a questionnaire. Data collection instrument that will obtain quantitative and qualitative data. Qualitative data was obtained from suggestions and input, while quantitative data was obtained from questionnaire calculations. The data analysis technique used is validation data analysis and learning media practicality data. The results of research validation analysis by three validators, namely media experts, material experts and learning experts using a Likert scale, show that the average validation of learning media is in the very feasible category. Apart from that, the results of the analysis of student response questionnaires, which involved thirty-two students, showed that the learning media obtained an average that fell into the very practical category. The conclusion of this research is that the interactive PowerPoint learning media on the subject of statistics, the material focusing on single data, has been tested and proven to be very feasible and very practical.”

The purpose of this study is (1) to describe the characteristics of a good mobile learning application to improve computational thinking and learning independence of high school students. (2) to produce a mobile learning application that is oriented towards computational thinking skills and student learning independence with good quality. The quality of the development results is determined based on Nieveen's criteria, namely valid, practical, and effective. This study is a research and development (R&D) that uses the Borg & Gall development model with 8 development steps, namely preliminary study, planning, initial product development, small group trials, main product revision, limited scale trials, operational product revisions and large-scale trials. The subjects in this study were 36 students from one class at SMA Negeri 1 Gamping, Sleman Regency. The instrument used to measure the validity of the mobile learning application is the expert validation sheet. The instrument to measure the practicality of the mobile learning application is the student response questionnaire. The instrument to measure the effectiveness of the application is the computational thinking test and the student learning independence questionnaire. Validity and practicality data analysis was conducted by converting quantitative data into qualitative form in the form of four standard scale values, while effectiveness data analysis based on test and questionnaire results was conducted using paired sample t-test. The results of the study showed that (1) Mobile learning applications have the characteristics of being easy to apply, flexible to time, lightweight and easy to carry anywhere and also implementing each computational thinking indicator in each stage of the material. (2) The results of expert validation showed that the developed mobile learning application met the valid criteria as seen by the Aiken's validity test score for media experts of 0.83 and 0.68 for material experts. The practicality of the mobile learning application is included in the very good category as seen from the average results with an average percentage of student responses of 87.17%. The effectiveness of the computational thinking test obtained a t-value of 47.22 greater than t (35,0.05) with a score of 1.69, the effectiveness of the learning independence test based on the t test obtained a t-value of 4.85 greater than t (35,0.05) with a score of 1.69. Based on the results obtained, it can be concluded that the developed mobile learning application meets the criteria of validity, practicality and effectiveness.

The utilization of technology in education has been increasingly developed, one of which is the use of chatbots in mathematics learning in elementary schools. This study aims to analyze the impact of chatbot usage on students' understanding of mathematics, learning independence, and time management. This research uses the Systematic Literature Review (SLR) method by reviewing various recent studies related to the implementation of chatbots in learning. The findings indicate that the use of chatbots can enhance students' understanding of mathematical concepts, strengthen learning independence, and help students manage their learning time more effectively. Chatbots provide opportunities for students to learn independently, give real-time feedback, and offer flexibility in learning time. The implications of this research emphasize the importance of integrating technology, specifically chatbots, to support more interactive and adaptive mathematics learning in elementary schools. The study also provides recommendations for further development of educational technology to improve the quality of future learning.

Happiness and motivation to learn mathematics are a must for students. With happiness in a student, it can create a sense of pleasure when doing something and motivation to learn mathematics needs to be in the student as well, with motivation or encouragement, learning will be more enthusiastic and enthusiastic, especially in learning mathematics. The purpose of this study was to see the correlation between happiness and motivation to learn mathematics in class V SDN 17 Pekanbaru. This study is a quantitative study with a correlational method and a population of 114 and a sample of 55 people. The results of the study showed a relationship between the two variables with a significance of 0.000 and a Pearson correlation value of 0.760 and a contribution from the variable of 58%, which means that happiness has a contribution of 58% to motivation to learn mathematics and the remaining 42% is influenced by other factors. This study is expected to provide the best solution that educators can do when teaching mathematics in the classroom.

This service aims to explain the increase in mathematics learning outcomes when implementing the MEA method in class X at MA Darussalam Manuju. The data collection technique uses data about students' mathematics learning completeness obtained from the results of mathematics learning tests carried out at the end of each cycle, with 27 class X students as the subject. The instrument is a learning results test sheet. The results show that the application of the MEA method can improve students' mathematics learning outcomes. This can be proven based on the average score of student learning outcomes in cycle I reaching an average of 69.3703 and in cycle II reaching an average of 87. Based on the learning outcome completeness category used, the score for students' mathematics learning outcomes categorized as complete in cycle I was 81.48% and in cycle II it increased to 100%. These results can be concluded that there has been an increase in Mathematics Learning outcomes using the Means Ends Analysis Method.