Abstraksi Reflektif Siswa Sekolah Menengah Pertama Pada Materi Segiempat Dan Segitiga

Abstract

The purpose of this study is to determine a person's ability to perform mental activities mechanically in associating new information received with previously owned information (reconstruction) which is a reflective abstraction. The process of reconstructing the concepts of quadrilaterals and triangles by students uses the mental mechanism approach of APOS theory (interiorization, encapsulation, de-encapsulation, coordination). The process can be known by observing students and analyzing the results of student work, starting with determining 1 class to be given a mathematical ability test. 29 students were present when the math ability test was given. The results of the mathematical ability test were analyzed and then found 2 students of different sexes with moderate ability. The first student is male and the second student is female, hereinafter referred to as the research subject, then the research subject is given the task of quadrilateral and triangle. The results showed that female students had done all stages of reflective abstraction in APOS theory. So, that these students were at the level of relational understanding. Meanwhile, male students only did several stages in the reflective abstraction stage on the APOS theory so that these students were included in the level of instrumental understanding.

Ethnomathematics explorations on the concept of two-dimensional shape in “Tadulako Bulili” folk story

“…Geometry material is among the most difficult materials because many make conceptual errors and solve contextual problems (Abdul Rohman et al, 2021;Anam, 2021;Suciati, 2019). Thus, it is necessary to find appropriate learning methods and interesting learning media to make it easier for students to understand the concept of geometry (Chuseri et al, 2021;Rachmawati et al, 2021).…”

“…Two-dimensional shapes are one of the materials related to mathematical numeracy and literacy. The two-dimensional shape is difficult to learn because many students make conceptual errors, including in solving contextual problems (Abdul Rohman et al, 2021;Anam, 2021;Suciati, 2019). Thus, it is necessary to find appropriate learning methods and interesting learning media to make it easier for students to understand the concept of two-dimensional shapes, especially for elementary school students (Chuseri et al, 2021;Rachmawati et al, 2021).…”

Development of Digital Media and Ludo Eksponen to Improve Learning Outcomes of Grade Ix Junior High School Students

“…Digital media can be used to make it difficult in the process of learning mathematics in the classroom which can create learners who provide students. This is because many students complain about mathematics as a very scary scourge, not even a few students who don't like mathematics (Anam, 2021).…”