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 This study aims to (1) reveal Mathematic learning through Google Classroom media in the midst of the Covid-19 pandemic, (2) find out the supporting and inhibiting factors for Mathematic learning through Google Classroom media in the midst of the Covid-19 pandemic, (3) school solutions and efforts and stakeholders to achieve Mathematic learning goals through Google Classroom media in the midst of the Covid-19 pandemic. The researcher used descriptive qualitative method. Research data obtained through in-depth interviews, observation, and documentation. The informants in this study were theprincipal, the head of the curriculum, Mathematic educators, homeroom teachers, class X students and guardians of students. Researchers used data analysis techniques, including data reduction, data presentation, drawing conclusions and checking the validity of the data. The results showed that, (1) PAI learning management in the evaluation of psychomotor aspects has not been implemented, (2) learning supporting factors, namely the existence workshops oflearning Google Classroom, strong signals and internet quotas, students having smartphones, and guardians of students being able to monitor and control students. learn while at home. Meanwhile, the inhibiting factors for learning are bad signals due to natural conditions and the concentration of students is easily disturbed, (3) the application of combined Mathematic learning, namely 50% face-to-face and 100% online requires good synergy between students, educators, families and communities. in order to achieve Mathematic learning objectives in the midst of the Covid-19 pandemic.   Keywords: , , 

This Community Service Program aims to strengthen literacy and numeracy in elementary school (SD) students where the focus is to provide assistance to students about the importance of strengthening literacy and numeracy in students. This activity was carried out by lecturers and students from the Mathematics Education Study Program and the Economics Education Study Program, the Teaching and Education Faculty, HKBP Nommensen University Medan. The implementation of Community Service activities in strengthening literacy and numeracy in students began on 06 February 2023 and ended on 25 February 2023. Previously, this Community Service activity had been socialized to students of SD Negeri 040536, in every classroom and it was seen that the cause of the lack of literacy and numeracy in students is still low due to lack of learning and arithmetic exercises. This problem was then minimized by carrying out related Community Service Program activities to strengthen literacy and numeracy for elementary school students. This program is an important matter in efforts to improve the concept of numeracy in schools.

This Classroom Action Research aims to minimize the low activity and mathematics learning outcomes of Binjai 14 Public Middle School students in the matter of the Two-Variable Linear Equation System (SPDLV). The recipients of the action were class VIII 2 students at SMP Negeri 14 Binjai with a total of 32 students. The data collection technique for this action was carried out in a qualitative descriptive way through the cycle stages with two rounds where each round consisted of two meetings. The results of this study are increased activity and student learning outcomes by using the cooperative learning model of the Teams Games Tournament (TGT) type. From the results of the initial test data obtained 28 students (87,5%) of 32 students with an average of 50,29%. The results of data analysis in cycle I after the cooperative learning model of the Teams Games Tournament (TGT) type showed that the number of students who achieved mastery learning was 25 students (78,12%) out of 32 students with a class average of 75%. In cycle II, 28 students (87,5%) achieved a mastery level with a class average of 80,79%. There was an increase from cycle I to cycle II. Likewise with student activities while learning took place in cycle I, the number of students who had a percentage of activity ≥ 70% classically was 2 students (6.25%) of 32 students and at the end of cycle II it increased to 28 students (87,5%). The classical increase in activity from cycle I to cycle II was 30%. So this study concluded that through the TGT learning model it can increase students' activity and learning outcomes in mathematics.

The low students' avarage number of mathematical critical thinking skills in class VIII SMPN 1 Candung ranged from 82.14% to 89.29%. To overcome this problem, researchers tried to conduct research by applying the EXO OLO TASK learning model in learning mathematics. This type of research is pre-experimental research with the research design The Static Group Comparison Design. The population in this study were all students of class VIII SMPN 1 Cawang. The samples in this study were students of class VIII.2 as the experimental class and VIII.1 as the control class. The instrument in this study was a test of students' mathematical critical thinking skills in the form of an essay test. The results of the study using the t-test obtained t_count=1.92 > t_table=1.674, so H0 was rejected. For Minitab software testing at a significant level of a = 0.05, Pvalue = 0.002 is obtained, meaning Pvalue <a, so H0 is also rejected. So it can be concluded that students' mathematical critical thinking skills using the EXO OLO TASK learning model are better than students' mathematical critical thinking abilities using conventional learning in class VIII SMPN 1 Cdungung.

This study aims to determine the application of the Problem Based Learning learning model to mathematical communication skills in terms of independent learning on set material in class VII SMP Negeri 01 Tayan Hulu. The research form used is quasi-experimental designs, with a 2×3 factorial design. The population in this study were students of class VII A and students of class VII B. The sample in this study was one class selected by cluster random sampling. Data collection techniques used are direct communication techniques and measurement techniques with data collection tools in the form of questionnaires and test questions in the form of essays. The data analysis technique used was the analysis of two dissimilar cell paths with the normality test using the Lilifors test, homogeneity using the Bartlett test and continued with the multiple comparison test using the Scheffe method. The results of this study are (1) the mathematical communication of students who follow the problem-based learning model is better than students who follow the conventional learning model, (2) the ability of mathematical communication between students who have high learning independence is better than moderate after the implementation of the model learning problem based learning. (3) students' mathematical communication skills in the moderate learning independence category were better than students in the low learning independence category after applying the problem-based learning model. (4) at the level of independent learning, problem-based learning models provide better mathematical communication skills than conventional learning models.    

This study aims to determine the application of problem based learning learning models with lottery game media in improving junior high school students' problem solving abilities. This research is an experimental research in the form of Pre-Experimental Designs. The design used is One Group Pretest-Postest Design. The population in this study were class VIII A and class VIII B. The sample in this study was students of class VIII B consisting of 20 students with the selection of subjects based on the cluster random sampling technique. The data collection technique used is a measurement technique with a data collection tool in the form of test questions in essay form. The data analysis technique used was anava one line of dissimilar cells, with further testing using the Scheffe method. The research results obtained were that there was a significant increase in students' mathematical problem solving abilities before and after being given treatment through the problem based learning model using lottery media with high categories.  

The purpose of this study is to describe the results of the analysis of improving students' mathematical communication skills with Realistic Mathematics Education approach. The type of this research is descriptive qualitative research using the library research method. The subject of this research is the most published articles in published journals about mathematical communication skills through Realistic Mathematics Education approach to junior high school students. Based on the findings from 5 journals, it was found that students' mathematical communication improved better in students who studied with Realistic Mathematics Education approach compared to students who studied with conventional learning. Realistic Mathematics Education approach can improve students' ability to describe, understand, and represent mathematical ideas contained in pictures, tables or diagrams. So, Realistic Mathematics Education approach is one approach that can improve students' mathematical communication skills at the junior high school level with effect size score of 1,158 in the large effect category.

This study aims to determine whether there is a positive and significant effect of the Group Investigation type cooperative learning model on students' mathematical reasoning and communication skills in the Pythagorean Theorem sub-subject in class VIII SMP Negeri 1 Munte in the 2019/2020 Academic Year. The population in this study were all class VIII students of SMP Negeri 1Munte for the 2019/2020 Academic Year. While the sample in this study consisted of 2 classes of 38 students each in class VIII-1 as the experimental class and class VIII-3 as the control class. The experimental class uses the Group Investigation cooperative learning model consisting of 5 students per group, and the control class uses the Group Investigation type cooperative learning model consisting of 2 students per group. This type of research is an experiment. Prior to testing the hypothesis, the normality and homogeneity tests are tested first. Normality was tested using the Lilliefors technique and homogeneity using the F test. From the tests performed, it was found that both samples were normally distributed and homogeneous. There is a positive and significant influence of the Group Investigation cooperative learning model on the mathematical reasoning abilities of junior high school students. There is a positive and significant influence of the Group Investigation type of cooperative learning model on the mathematical communication skills of junior high school students because the average communication ability of students who are taught with the Group Investigation type cooperative learning model consisting of 5 people per group is higher than the average communication ability of students who are taught with the Group Investigation type cooperative learning model consisting of 2 people per group

The world of education today must be treated and managed professionally, because of the increasingly fierce competition. Madrasah with good assessment in the eyes of the community will have a good impact on the madrasa. This requires a strategy carried out by the Head of madrasah so that the madrasah he leads becomes a favorite. The purpose of this study is to explain the strategies used and the constraints faced in the strategy of Madrasah Ibtidaiyah Mathlaul Anwar Tegal Waru Ciampea Bogor to increase the number of students. This research is a research using qualitative methods. This qualitative research method was chosen because the researcher intends to describe and analyze certain phenomena in depth and detail. Data collection methods used by observation, interviews and documentation. The results of research on the strategy carried out by MI Mathlaul Anwar Ciampea Bogor by applying two strategies. First, the intern strategy with two steps, 1) Improving the quality of students, 2) Improving infrastructure. Second, the external strategy is, 1) Brochure distribution, 2 Openings for Marawis and Tahfiz extracurricular activities. The obstacles faced by madrasah are; 1) the location of the madrasa is far from the city center 2) There is intense competition between educational institutions, 3) The Covid-19 pandemic situation forces online learning.

The research method used in this study is the research and development method or also called Research and Development. The research design that will be developed in this study uses the development model presented by Borgan Gall. The product produced in this study is an Arduino Nano-Based Distance Measuring Tool with a Display on the LCD on the Flat Side Room Building Material for Class VIII at SMP Negeri 5 Sepauk. The test subjects of this study included two subjects. The first subject is the validator and the second is class VIII students of SMP Negeri 5 Sepauk. The analysis technique used is to determine the effectiveness, practicality, and validity. The percentage of effectiveness from the average of the two analyzes obtained a percentage value of 94.06% with Very Effective criteria used in learning mathematics. The results of the combined teacher and student response questionnaires - the average percentage obtained was 89.55% with very practical criteria. The combined results of the average percentage obtained from the percentage of experts and the results of the measurement trials obtained a percentage of 76,36% with very valid criteria.    

This study aims to analyze learning with a Realistic Mathematics Approach to the mathematical communication abilities of Grade VIII students and studied based on gender which was carried out at SMP Negeri 3 Silangkitang. This research is a quantitative study using the Two Ways Anova test to see the effect of learning variables and gender on students' mathematical communication abilities, as well as to see the interactions between the three variables. This research was conducted for 5 meetings which included pretest and posttest. . The two-way Anava analysis shows that the Realistic Mathematics Approach has a positive and significant effect on students' mathematical communication skills compared to the usual learning approach and there is no interaction between learning and gender on students' mathematical communication abilities.

This study aims to improve students' mathematical problem-solving skills through the Missouri Mathematics Project (MMP) model on the material of a Linear Two Variable System in grade VIII-6 students of SMP N 4 Medan as a subject or this research. The type of this research is classroom action research. The instrument used the collect the data are essay test and observation sheet. Before giving the action in initial test to 32 students obtained the average score is 50.46 with the classical completeness is 34.37% or only 11 students achieve the completeness criteria. The completeness criteria is the standard point that must be reached by students namely at least 65 and classical completeness is the standard percentage that must be reached by the class namely at least 85%. After given the action in the first cycle namely the implementation of MMP learning model to 32 students, obtained the average score is 63.9844 with the classical completeness 50% or 16 students achieve the completeness criteria. Then given the second cycle namely increasing MMP learning model, obtained the average score is 82.11 with the classical completeness 93.75%. Based on the observation done by teacher obtained that the point of second cycle is higher than the point of first cycle. Based on the average gain score, obtained that the average gain score in Cycle I test-Cycle II test is higher than Initial Test-Cycle I Test. From the result of research, can be concluded that the mathematical problem-solving ability of students can be increased or improved especially on the topic of Linear System with Two Variable by using Missouri Mathematics Project Learning Model

This study aims to produce fable media with character in improving mathematical communication skills as a medium for learning mathematics in quadrilaterals that reach the level of validity, practicality, and effectiveness. This study uses the Research and Development model with the ADDIE development plan, which consists of five stages, namely analysis, design, development, implementation, and evaluation. The subjects in this study were development subjects or experts and product trial subjects, namely class VII A students of SMP 5 Silat Hulu. The data collection techniques used were indirect communication techniques and measurement techniques, the data collection tools used were expert validation sheets, questionnaires and communication skills test questions in the form of essay questions. Data analysis techniques used in this study are validity, practicality, and effectiveness. The results of the first study are the validation of fable media, namely the average value of the three experts is 83.63% with very valid criteria. The second is the value of practicality, seen from the value of the questionnaire filled in by teachers and students which is accumulated so that a percentage of 91.60% is obtained with very practical criteria. Furthermore, effectiveness, seen from the posttest work to measure students' mathematical communication skills, was 66.66% with effective criteria. Thus it can be concluded that online fable learning media has character in improving mathematical communication skills in the rectangular material for class VII junior high school which is valid, very practical, and effective to use.    

This study aims to analyze the initial needs of learning strategies in increasing motivation and learning outcomes of Mathematics for class V Elementary School (SD). The method used in this study is a qualitative descriptive method with research instruments in the form of observation, questionnaires, interviews, and assessment document analysis. The data analysis technique used includes three stages, namely data reduction, data presentation, and drawing conclusions. Based on the results of the initial instrument data analysis, it was found that the motivation and learning outcomes of the fifth grade students at SD Negeri Songgom 01, SD Negeri Songgom 02, SD Negeri Songgom 04 and SD Negeri Songgom 05 in learning mathematics were still low. The average value of student learning motivation is only 62 with the highest score being 82 and the lowest score being 50. While the average score of student learning outcomes is 66.7 in the low category while the highest score is 85 and the lowest score is 45. Low motivation and student learning outcomes are caused by the condition of the learning environment that is not conducive, lack of facilities and infrastructure, lack of support from parents, and the difficulty of using appropriate learning strategies in learning. This research can be used as an initial analysis of the need for appropriate learning strategies in Mathematics learning materials so that students' motivation and learning outcomes can increase.

This research aims to describe the analysis result of the use of learning media in the Problem Based Learning model. The methods used in this research is literature study of 6 sources consists of 3 thesis and 3 journals discuss the use of learning media in the Problem Based Learning model in Indonesia published in the span of 2016-2022. From the calculation of the effect size, the average value is 0.79 which is categorized in the medium category. This shows that the use of learning media with Problem Based Learning in mathematics learning had a positive effect on improving the mathematical ability of students and the effect obtained is in the medium category. The mathematical ability could be improved based on the literature study such as student’s mathematical connection ability, student’s mathematical problem soving ability dan student’s mathematical numeracy literacy ability. The type of learning media according this research are animation, geogebra, microsoft power point, fun math book, cabri 3D v2 dan youtube. Hope for further research can be analyzed more deeply by using more sources so the result will be more maximal and varied.

This research aims to find out the results of research analysis of students abilities through the Two Stay Two Stray (TSTS) type cooperative learning model from various literature, as well as to analyze the difficulties of students mathematical communication skills through the Two Stay Two Stray model. This type of research is descriptive qualitative and uses a literature study research method which was carried out at the Digital Library, Medan State University in July – September 2022. The instrument in this study was the author himself. The steps of this research are: (1) Designing the research. (2) Carry out the research design. (3) Analyze and provide conclusions on the results of the analysis. The analysis technique used in the selection of information related to data analysis techniques is the Miles and Huberman analysis technique. The data source used secondary data consisting of 5 journals. The conclusions of the results of this study show that: (1) The average results of tests of students mathematical communication abilities through the application of the TSTS model are: (a) The indicator of mathematical representation is 51.93%, (b) The indicator of writing/explaining mathematics was 40.31%, (c) The indicators describe is 37.94%. (2) There are several difficulties experienced by students and teachers are: (a) Students have difficulty connecting real objects, pictures, and diagrams into mathematical models, (b) Students lack confidence in communicating arguments and ideas in mathematical problems, ( c) Students are less thorough in working on questions, (d) Students have difficulty expressing mathematical ideas in the form of graphs, pictures, or tables, (e) Low student skills in understanding mathematical communication problems and drawing conclusions about mathematical communication problems, (f ) The role of the teacher is less than optimal in carrying out learning activities.

This study aims to obtain teaching materials based on a valid, practical, and effective realistic mathematical approach, so as to improve students' mathematical reasoning abilities on the material of a three-variable linear equation system. The research instruments used were questionnaire validation sheets, lesson plans validation sheets, teaching material validation sheets, test instrument validation sheets, mathematical reasoning ability tests, and teacher and student response questionnaires to teaching materials. After all instruments, lesson plans, and teaching materials were declared valid by the validator, then readability tests and field trials were carried out. The results showed that: (1) the teaching materials based on the realistic mathematical approach developed had met the criteria of validity based on the validator's assessment with the average validity of the teaching materials for the material being 3.13 and 3.29 for media with a very feasible category; (2) the teaching materials based on the realistic mathematical approach that have been developed have met the practicality criteria through: a) the results of the questionnaire student responses to teaching materials show the percentage of practicality of 81.19% with a very practical category, b) the results of the questionnaire responses of teachers to teaching materials show the percentage of practicality 88.75% with very practical category; (3) The teaching materials based on the realistic mathematics approach developed meet the effective criteria with: a) classical student learning mastery of 88%, b) more than 65% of students have achieved 75% of learning objectives for each indicator, c) increased mathematical reasoning ability students after using teaching materials seen through the average score of students increased from 50 in the pretest to 85.33 in the posttest and the results of the N-Gain analysis which showed students' mathematical problem solving abilities increased by 0.712, meaning in the high category.

This study aims to determine students’ mathematical connection abilities with the think talk write cooperative learning model. The type of research used is research with a qualitative approach. Qualitative research uses descriptive or verbal data from people who have behaved. The method used is literature study. The type of data used is secondary data. Secondary data is data that already exists, so we just need to find and collect existing data. The secondary data source used in this research is the influence of the cooperative learning model of the think talk write type on students’ mathematical connection .From the search results, the researchers found 3 journals and 2 thesis relevant to the research topic. From the journal it was found that there was an influence of the think talk write cooperative learning model on students’ mathematical connection abilities.

This study aims to determine : (1) The effect size of using mathematic learning media to students’ mathematical abilities as a whole, (2) The effect size of using mathematics learning media to students’ mathematical abilities based on level of education, (3) The effect size of using mathematics learning media to students’ mathematical abilities based on learning media used, (4) The effect size of using mathematics learning media to students’ mathematical abilities based on subject matter, (5) The effect size of using mathematics instructional media to students’ mathematical abilities based on quantified mathematical ablility. This research used meta analysis method. The sampling technique used purposive sampling and obtained 17 research that fit the criteria. Data collection techniques used documentation with the support of software publish or perish. The results of data analysis showed that : (1) Overall using the learning media has a large effect to students’ mathematical abilities as a proportion 0,972, (2) Based on level of education, the use of learning media has a largest effect size if applied at SMP/MTs as a proportion 1,039 (n=16, SD=0,754), (3) Based on learning media used, the visual media has a largest effect size to students’ mathematical abilities as a proportion 1,003 (n=13, SD=0,641), (4) Based on material that is taught, the use of learning media on a branch of logic material has a largest effect size to matematical abilities as a proportion 1,237 (n=2, SD=0,489), (5) Based on quantified mathematical abilities, the use of learning media has a largest effect size to students’ reasoning abilities as a proportion 1,303 (n=3, SD=0,353).

This study aims to find out that studying literature can effectively improve students' mathematics learning achievement with the STAD type cooperative learning model.  The type of research used is research with a qualitative approach.  Qualitative research uses descriptive or verbal data from people who have observed a behavior.  The method used is literature study.  Literature study is an activity that is closely related to the method of collecting library data, reading and taking notes as well as processing research materials.  The type of data used is secondary data.  Secondary data is data that already exists, so we just need to find and collect existing data.  The secondary data source used in this research is student learning outcomes with the STAD type cooperative learning model.  From the search results, the researchers found 7 journals relevant to the research topic.  From the journal it was found that there was an increase in student learning outcomes using the STAD type cooperative learning model.