The purpose of this research was to produce a worksheet based on problem-based learning that would enhance students' ability to communicate mathematically when working with number pattern content. The quality of this LKPD refers to the effective aspect. This research uses a type of research and development (R&D) with a model developed by Borg & Gall. The subjects in this research were students in class VIII-5 of SMP Negeri 1 Tanjung Morawa with a total of 27 students. The object of this research is teaching materials in the form of PBL-based LKPD. Teacher response questionnaires, student response questionnaires, expert validation sheets, teacher interview question sheets, and tests of mathematical communication competence were the tools employed. Based on the research results, the effectiveness of LKPD can be seen from the achievement of learning completeness with an average individual learning completeness of 88 and for classical completeness of 96.3%. So the LKPD developed is declared "effective". Students' mathematical communication abilities are at a percentage of 90.1%, at high criteria, and it can be noted that for the N-Gain assessment, results were obtained with a student average of 0.74, meaning that there was an increase in students' mathematical communication abilities with high criteria. So, based on the results, it can be concluded that the LKPD developed in this research is valid, effective, and can improve students' mathematical communication skills.

The development of information and communication technology (ICT) has opened up great opportunities in increasing the effectiveness of mathematics learning, especially in supporting students' computational thinking skills. This article presents a mini-literature review related to the use of Tibi's Mathematics Suite (TMS) as interactive software in mathematics learning. Using a descriptive qualitative approach and desk research method, this study analyzes various scientific sources to evaluate the contribution of TMS to the development of computational thinking, which includes decomposition, pattern recognition, abstraction, and algorithms. The results of the study show that TMS is able to increase students' interest in learning, independence, and metacognitive awareness, although its implementation still faces challenges such as limited infrastructure and teacher training. This review recommends the need for further empirical studies and education policy support so that the integration of TMS can be more optimal in the context of the Independent Curriculum and the strengthening of the Pancasila Student Profile.

Understanding the basic concept of multiplication is one of the important competencies that must be possessed by elementary school students. This study aims to analyze the extent of understanding the concept of multiplication of whole numbers in third grade elementary school students. A strong understanding of the concept at the initial stage is very important as a basis for mastering subsequent materials. This study uses a qualitative descriptive approach with data collection techniques in the form of diagnostic tests. The test is designed to identify the level of understanding of third grade elementary school students. The subjects of this study were third grade elementary school students. The results of the mini-research showed that some students had difficulty understanding story problems so that they considered them to be additions, errors when reading multiplication problems, and misconceptions that emerged in solving multiplication problems. Students had great difficulty making mathematical forms from story problems. These findings provide an important picture for teachers to design more effective learning and adjust their learning needs. Keywords: understanding concepts, mathematics learning, multiplication.

This study aims to analyze the level of understanding of the division concept among third-grade elementary school students. Understanding division is a fundamental component in mathematics learning, serving as a basis for more complex numerical operations in higher grades. The research employed a descriptive qualitative method involving 5 students from an elementary school in. Data were collected through diagnostic tests, interviews, and observations. The findings revealed that most students still struggle to grasp the concept of division, particularly in understanding it as a grouping process and as repeated subtraction. Factors influencing students' comprehension include limited use of varied teaching methods, insufficient application of concrete learning media, and differences in students' learning styles. These findings are expected to serve as a reference for teachers in designing more effective and contextual learning strategies to enhance students’ understanding of the division concept at the elementary level.

This study aims to enhance students' critical thinking skills in Science learning at SMP Negeri 259 Jakarta through the utilization of the Class Point application. The research employs the Classroom Action Research (CAR) method conducted in three stages: pre-cycle, cycle I, and cycle II, with 35 eighth-grade students as the subjects. The results show that the use of Class Point significantly improved students' critical thinking skills, reflected by the increase in the class average score from 68.2 in the pre-cycle to 82.1 in cycle II. The students' engagement also increased from 55% in the pre-cycle to 89% in cycle II. Thus, the use of Class Point proves to be an effective alternative in enhancing students' critical thinking abilities in Science learning.

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.