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This research is a Classroom Action Research (PTK) which is carried out in 2 cycles. Before carrying out research or taking action, an initial test is given to measure students' problem-solving ability and at the end of each cycle a problem-solving ability test is given. This study aims to determine how to improve problem solving skills through the application of the Geogebra-assisted Problem Based Learning (PBL) learning model. Students experienced an increase in problem-solving skills, in the initial test the average problem-solving ability was 42.19%. In the first cycle, the test results showed an increase of 57.81%. From the results of the second cycle test also increased to 88.50%. The test results showed an increase in students' problem-solving abilities. Thus, it can be concluded that the application of the Geogebra media-assisted PBL model can improve students' problem-solving abilities.

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 research is to analyze the effectiveness of Geogebra learning media in solving math problems among students. The method used in this study is the literature review method with a qualitative approach, which involves a literature review of library sources such as books, articles, journals. Data collection techniques were carried out by conducting literature studies and distributing questionnaires and test questions given to 10 students from class 4C in the 4th semester of Mathematics Education at Indraprasta University PGRI, who were considered to represent the entire research subject. The data analysis technique uses descriptive analytic by collecting data then compiling, analyzing and drawing conclusions. The results of this study indicate that Geogebra is less effective in solving mathematical problems due to lack of knowledge about Geogebra and low interest in using Geogebra.

Community Service (PKM) is one of the forms of Higher Education's Tri Dharma. PKM is proposed to carry out activities that focus on socialization and education. Learning mathematics is about understanding abstract ideas or concepts, structures, and their logically and systematically organized relationships. Media is a communication component that serves as a carrier of messages from the communicator to the communicant. One of the learning media used to facilitate students is the Geogebra application. Geogebra is a computer application created to facilitate mathematics learning, especially in geometry, algebra, and calculus subjects. By using the Geogebra application, it can improve students' mathematics learning outcomes. The method used in this PKM is education and direct practice of the "jarimatika" method in multiplication problems. As a result, participants become more understanding of the Geogebra application.

This study aims to find out how to improve students' mathematical creative thinking skills after using the Problem Based Learning model assisted by Geogebra media and to find out how students' answers process in solving problems on the mathematical creative thinking ability test after applying the Problem Based Learning model assisted by Geogebra media. This type of research is Classroom Action Research (PTK) which was conducted in two cycles, the subjects in the study were class IX-3 MTs Citra Abdi Negoro, totaling 27 students. This research is said to be successful if it meets the indicators of success, namely, (1) The level of students' mathematical creative thinking ability increases with a value of ≥ 85% at least in the medium category, (2) The process of completing student answers with a value of ≥60% at least in the good category, (3) The results student and teacher observations show a good category. Based on the results of the study, the average initial ability test score of 58.10 increased to 61.34 in cycle I and 80.55 in cycle II. There was also an increase in classical completeness, in the creative thinking ability test of 8 students (29.63%) in the initial ability test increased to 12 students (44.44%) in cycle I and 25 students (92.59%) in cycle II. For the process of student answers from cycle I with an average presentation of 50 students' answer processes, 31% increased to 70.67% in cycle II. Based on the results of the study it can be concluded that the Problem Based Learning model assisted by Geogebra media can improve students' creative thinking skills.

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.