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This article explains the numeracy literacy abilities of junior high school students in solving word problems in algebraic operations material. This research was conducted at SMP Negeri 1 Siantar with a total of 32 students. Data was obtained through numeracy literacy skills tests and interview results, then the data was analyzed using descriptive study quality. The research results show that the ability of students with the highest scores can fulfill two to three indicators, while students with low numeracy literacy skills test scores only fulfill one indicator test. Failure to fulfill indicators is caused by student errors, including: 1) Not writing down the data information that is known and being asked, 2) Making mistakes in solving problems, 3) Making mistakes in calculating, and 4) Not writing conclusions on the questions obtained from the answers.

The purpose of this research is to find out how the influence of the Team Assisted Individualization (TAI) type cooperative learning model on students' mathematics learning outcomes in class VII algebra form material at UPTD SMP Negeri12 Pematang Siantar. The approach taken in this study is a quantitative approach. The instruments used in this study were questionnaires (questionnaires) and learning outcome tests. Data analysis techniques use prerequisite tests, namely normality tests and linearity tests. To test whether Team Assisted Individualization (TAI) type cooperative learning models affect learning outcomes, a simple linear regression test was used. From the simple linear regression test performed, the regression equation Y = 8.804 + 0175.X which can be interpreted as every addition of 1% of the questionnaire value will cause an increase in learning outcome test scores of 0.175. It can be seen that the value of the regression coefficient is greater than 0 (positive value), so there is a positive influence between variable 50,8%.

This research aims to see how the mathematical thinking abilities of students who have a field independent cognitive style are based on Shafer and Foster's theory. This research uses a descriptive approach. The sample for this research is 3 class VII students of SMP Negeri 6 Purworejo. The technique for selecting subjects in this research was purposive sampling technique. The data collection techniques used were mathematical thinking test methods, interview methods and documentation. The data analysis technique used is reduction, presentation and drawing conclusions. The results of research regarding the level of mathematical thinking ability based on Shafer and Foster's theory in solving algebra material problems showed that students at SMP Negeri 6 Purworejo who had a field independent cognitive style in solving the reproduction level were able to know basic facts, namely knowing and writing down any information that could be known in questions and determine the problem correctly, at the completion of the connection level students are able to integrate information, namely explaining the steps to solve the problem correctly and applying the right algorithm to solve the problem, at the completion of the analysis level students are able to mathematize situations, namely being able to change real problems into mathematical form by make equations and make generalizations, namely being able to find the correct answer.

The research method used in this research is descriptive qualitative research with the aim of the research being to describe the mathematical communication profiles of blind students. This research was conducted at SLB Negeri Rasau Jaya which is located at Education Street No. 2, Desa Rasau Jaya Satu, Rasau Jaya District, Kubu Raya Regency, West Kalimantan Province, using the K13 curriculum. This study will describe the mathematical communication of SLBN Rasau Jaya students in the Cartesian coordinate material seen from aspects (1) The ability of students to give answers using everyday language in explaining ideas, situations and mathematical relations, orally or in writing with real objects, pictures, graphics and algebra. (Aspects of Written text); (2) Students' ability to connect real objects, pictures, and diagrams into mathematical ideas. (Drawing Aspects); (3) Students' ability to express everyday events in language or mathematical symbols. (Aspects of Mathematical Expression). In this study, the subjects of the study were all students of class VIII SLB Negei Rasau Jaya, which consisted of three students with low vision criteria. The data collection tools used in the research were observation sheets, interviews, and written tests. The mathematical communication skills of blind students have good abilities in the aspect of drawing. While the writing aspect was not fulfilled properly and the mathematical expression aspect did not meet the indicators at all.

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.

The objective offthis study is to assess the impact of the Think-Pair-Share (TPS) cooperativeelearning modelron the mathematical development of students. This method of investigation is quasi-experimental. This study included students from both seventh grades at SMP Negeri 4 Tabukan Utara. The data was obtained from a test designed to assess understanding of Algebraic Fractions. Class analysis results for the Think Pair ShareeCooperative learninggmodel class and the direct learning model class indicate that the average learninggoutcomes of studentsstaught utilizing the ThinkkPairrShare Cooperativeelearning modelaare greater than those of studentsstaught utilizing the direct learning model.

This research is aim to describe the difficulties in learning and solving Algebra problems experienced by class VII Students of SMP Negeri 7 Cimahi. This research method uses a descriptive method with a qualitative approach. The subjects used in this research were five Students of class VII H who were randomly selected, and the teacher concerned. The instrument used in this study were written tests, questionnaires and interview guides. The results of this research indicate the various difficulties experienced by Students and the factors that cause them. These difficulties include difficulties in identifying coefficients, determining like terms, and performing various arithmetic operations in Algebraic forms. The factors that cause Student difficulties are divided into two, namely internal and external factors. The internal factor is that Students don't understand the concept and don't master arithmetic operations on integers, while the external factor is the lack of Interest, talent and motivation of Students in learning Algebra.