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All Journal Al-Jabar : Jurnal Pendidikan Matematika Jurnal Kajian Pembelajaran Matematika Numeracy : Jurnal Ilmiah Pendidikan Matematika Jurnal Fibonaci: Jurnal Pendidikan Matematika IndoMath: Indonesia Mathematics Education
Rif’at, Mohamad
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Humanities Education Mathematics

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Journal : Al-Jabar : Jurnal Pendidikan Matematika

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Developing of Doing Proof for School Mathematics through Teaching and Learning Rif’at, Mohamad; Sudiansyah, Sudiansyah; Peterianus, Septian
Al-Jabar: Jurnal Pendidikan Matematika Vol 13 No 2 (2022): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v13i2.23566

Abstract

The word and the etymological sense are two hints about effective use of language, about exploration techniques, and about developing representation of information. For example, the length and width of a rectangle are not about position, but a measurement or a quantity concept. Based on the example, an area problem which given a picture and the measurements is not mathematics problem. That is a language trajectory of representations or a problem of the etymological sense. When asked to find the perimeter of rectangle, but the two quantities are whole numbers and neither is divisible by 6, then, that is mathematics trajectory. However, if the area known, say 36 squares of a measure unit, then problem of getting the perimeter is to test or to check. That is also a kind of the etymological sense of meaning
Algebraic and Visual Representation in Solving Mathematics Problems Based on Empirical Thinking Rif’at, Mohamad; Sudiansyah, Sudiansyah; Peterianus, Septian
Al-Jabar: Jurnal Pendidikan Matematika Vol 12 No 2 (2021): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v12i2.23567

Abstract

The researcher investigated and explored a solution of non-directed or no hint of mathematics problems presented visually or algebraic, and to embed the empirical verification thinking. The tip is a way to solve, so the students can answer the questions based on their state of mind by observing their trajectories of thinking from the steps of the solution. That is conducted at the Mathematics Education Department of Tanjungpura University at West Borneo of Indonesia for two semesters. The problems are from Researcher Repertoire, test item of Teacher Profession Education of National Indonesia, and Flanders Mathematics Olympiad. Before the issues given to the students, the construct validity has calculated from intake participants using Cramer’ Test with C coefficient is equal to 0.83. We analyze the students’ empirical verification thinking of their solutions. The analysis is about the trend of the thinking, model of representation, and completeness of the logical steps. The results are: the pattern of thinking tends to linear model or of meta-pattern, the description tends to be non-linear or varies of the solution, and the logical steps tend to be a non-recognizable form of thinking. In general, the more visual representations, the less thinking models of the representations; the answers based on algebraic thinking; the visual illustrations are limited, where the algebraic without any manipulation and not need any hint; and the visual images used are part of it in solving the problems and no manipulation.
Enhancing numeracy literacy through algebra learning materials: A vocational high school context Hapsari, Tiara; Rif’at, Mohamad; Kusumastuti, Nilamsari
Al-Jabar: Jurnal Pendidikan Matematika Vol 16 No 1 (2025): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v16i1.27935

Abstract

Purpose: This study aims to develop algebra teaching materials based on numeracy literacy to enhance vocational high school students’ understanding of mathematical concepts and their ability to solve contextual problems.Method: The research used a qualitative research and development approach following the ADDIE model, which includes five stages: analysis, design, development, implementation, and evaluation. Data were collected through interviews, expert validation sheets, questionnaires, and numeracy literacy tests administered to tenth-grade students.Findings: The analysis stage revealed that only 44 percent of students met the minimum standard of numeracy literacy. After the implementation of the developed materials, 71.8 percent of students achieved the Minimum Mastery Criteria (KKM), indicating improved performance. Expert validation yielded a score of 81.67, suggesting high validity. Students also gave positive responses, with average ratings of 80.67 percent for content, design, and language.Significance: The study demonstrates that algebra teaching materials designed through a structured development model and grounded in numeracy literacy can significantly improve student learning outcomes in vocational education. These materials help bridge the gap between theoretical concepts and real-world application, supporting national educational goals related to the Minimum Competency Assessment (AKM) and preparing students for professional environments.
Co-Authors Dede Suratman Fredi Ganda Putra Hapsari, Tiara Hendrajaya Hendrajaya, Hendrajaya Ida Ayu Putu Sri Widnyani Krisdiyanti, Iis Nilamsari Kusumastuti Nurfadilah Siregar Pajarudin, Kurniadi Peterianus, Septian Puji Rahmawati Rustam Rustam Slamet Riyadi Sudiansyah, Sudiansyah Sugiatno Sugiatno