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The purpose of this study was to determine the relationship between mathematical communication skills and self-confidence in mathematics learning for fifth grade students at SDN Banyu Ajuh 06, Kamal, Banyu Ajuh, Kec. Kamal, Kab. Bangkalan on building materials. This research uses quantitative methods. The research population is all fifth grade students for the 2022/2023 Academic Year. Sampling in this study using a total sample. The research sample was 22 students. Data was collected using test questions and observation sheets. The results of the study show that 1) there is a positive relationship between mathematical communication ability and self-confidence with a moderate level of relationship, 2) that the relationship between mathematical communication ability and self-confidence is 29.4%, while 70.6% is influenced by other variables .

This study aims to determine: Showing an interactive learning media of mathematics on students' mathematical communication skills as a whole, The magnitude of the influence of using Geogebra-based interactive learning media on mathematical communication abilities based on educational level,  the magnitude of the effect of using interactive mathematical learning media on mathematical communication skills based on previously used interactive learning media, the large influence of the use of interactive learning media plays an important role in systematic mathematical methods, the large effect of the use of interactive learning media on mathematical communication skills is imaginative to mathematical communication based on the mathematical ability that is measured. This study uses the addie model. This sampling technique is highly influential using the Addie model and obtained 20 studies that match the criteria. This data collection technique uses freetest and posttest with the help of Geogebra Classic 6 software and the help of Microsoft powerpoint. The results of this data experiment show that:  overall this interactive learning media has a major influence on students' mathematical communication abilities.

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 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.

Rapid technological advances make print communication media begin to be shifted by information media that utilizes computer technology as a means of delivery. Technological developments change the teacher's task from being a teacher to a facilitator who provides convenience in learning. SD Negeri 004 Bangsal Aceh is one of the schools that still applies the mathematics learning process using textbooks so that students do not understand the lesson. Teachers are required to make changes in teaching patterns in the classroom, one of which is with animated videos. This study uses the Multimedia Development Life Cycle (MDLC) method covering concept, design, collecting material, assembly, testing and distribution. The final result of this research is an animated video of mathematics learning about the material of flat shapes. Animated videos are used as an interesting and effective means of information and learning media. Besides that, it can also improve students' understanding and skills in learning mathematics, especially the material of flat shapes