Analysis of mathematical abstraction on concept of a three dimensional figure with curved surfaces of junior high school students

String art on an octahedron provides a viable way to teach and illustrate geometric concepts to junior high school students. This learning experience also furnihes an opportunity to correlate mathematics and art. Furthermore, artistic geometric constructions often stimulate junior high school students, particularly those who do not fare well in other areas of mathematics. After completing the following construction, students and teache rs should agree that learning can be fun.

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Analisis situasi didaktis dalam pembelajaran matematika berbantuan ICT pada siswa SMP

PYTHAGORAS Jurnal Pendidikan Matematika ◽

10.21831/pg.v15i1.32573 ◽

2020 ◽

Vol 15 (1) ◽

Author(s):

Ardhi Prabowo ◽

Dadang Juandi

Keyword(s):

High School ◽

High School Students ◽

Junior High School ◽

Junior High ◽

Mathematics Learning ◽

Three Dimensional ◽

Junior High School Students ◽

School Students ◽

Virtual Objects ◽

Teacher Students

Penelitian ini bertujuan untuk mengidentifikasi apakah mahasiswa calon guru matematika mampu membangun situasi didaktis matematis pada siswa SMP dalam pembelajaran matematika berbasis ICT (Information and Communications Technology). Penelitian ini adalah penelitian deskriptif kualitatif. Subjek penelitian adalah mahasiswa calon guru yang telah praktik mengajar di sekolah. Subjek menggunakan aplikasi yang dibuat sendiri oleh subjek. Aplikasi yang dibuat berupa Augmented Reality (realitas bertumbuh), yaitu teknologi yang menggabungkan benda maya dua dimensi dan atau pun tiga dimensi ke dalam sebuah lingkungan nyata tiga dimensi lalu memproyeksikan benda-benda maya tersebut dalam waktu nyata. Hasil penelitian menunjukkan karakteristik situasi didaktis dalam pembelajaran matematika berbantuan ICT pada siswa SMP yang dibangun oleh mahasiswa calon guru adalah sebagai berikut: situasi didaktis matematis yang dibangun belum mengonstruksi pengetahuan siswa secara mandiri; situasi didaktis matematis yang dibangun cenderung berasal dari informasi yang disampaikan guru, bukan dari media ICT yang digunakan; dan ICT yang dilibatkan dalam pembelajaran belum mampu mengelaborasikan proses kognitif siswa dalam jejak pembelajarannya. Analysis of a didactic situation in ICT-assisted mathematics learning in junior high school studentsAbstractThis study aims to identify whether prospective mathematics teacher students are able to build mathematical didactic situations in junior high school students in ICT-based mathematics learning. This research is descriptive qualitative research. The research subjects were prospective teachers who had practiced teaching at school. The subjects used applications made by themselves. Those applications were in the form of augmented reality (reality grows), namely technology that combines two-dimensional and or three-dimensional virtual objects into a real three-dimensional environment and then projecting these virtual objects in real-time. The results showed the characteristics of didactic situations in ICT-assisted mathematics learning in junior high school students built by prospective teacher students were as follows: didactic mathematical situations that were built had not constructed students' knowledge independently; the built mathematical didactic situation tends to originate from the information conveyed by the teacher, not from the ICT media used; and ICT involved in learning has not been able to elaborate the cognitive processes of students in their learning footprint.

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BENDA MANIPULATIF DARI SANDAL JEPIT DAN PELEPAH RUMBIA UNTUK PEMAHAMAN KONSEP ALJABAR SISWA KELAS VIII SMP

Jurnal Pesona Dasar ◽

10.24815/pear.v6i1.10706 ◽

2018 ◽

Vol 6 (1) ◽

Author(s):

Fachrurazi Fachrurazi.

Keyword(s):

High School ◽

High School Students ◽

Junior High School ◽

Junior High ◽

Quadratic Equation ◽

Junior High School Students ◽

School Level ◽

Research Subjects ◽

School Students ◽

Mathematical Abstraction

Student difficulties in understanding algebra particularly in factoring is because teachers have not been able to utilize manipulative objects (props) as a medium to narrow nature of mathematical abstraction itself. Props mathematics is a concrete object that can be manipulated, in order to bridge mathematical abstraction. Flip-flops and frond thatch are two things that will serve as a manipulative object in learning algebra. The purpose of this study are: (1) to describe the use of flip-flops and frond thatch as manipulative objects to enhance the ability algebra of junior high school students; and (2) To know the use of manipulative objects flip-flops and frond thatch will reach or not the ability algebra of junior high school reached an average of more than 65. This study is a quantitative study with experimental method. In this study there is only one group of research subjects derived from the 3 school level (low, medium, and high), the experimental group doing mathematics by using manipulative objects. To determine the ability of an algebraic increase to more than 65 will be used t-test. The result showed that the tcount ttable (5:44 1.67), so in this case H0 is rejected. Further in the learning process was also found that the students are very easy in factoring a quadratic equation by using the manipulative objects. The conclusions of this study are: (1) Learning with the use of flip-flops and sago palm frond as manipulative objects to the increased ability of algebra junior high school students has been going well and facilitate student. (2) Learning mathematics algebra material using props from the flip-flops and frond thatch can improve the understanding of junior high school eighth grade on the material algebra reaches an average (μ0) of more than 65.

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RELATIONSHIP BETWEEN MISCONCEPTION AND MATHEMATICAL ABSTRACTION OF GEOMETRY AT JUNIOR HIGH SCHOOL

Infinity Journal ◽

10.22460/infinity.v9i2.p213-222 ◽

2020 ◽

Vol 9 (2) ◽

pp. 213

Author(s):

Gida Kadarisma ◽

Nelly Fitriani ◽

Risma Amelia

Keyword(s):

High School ◽

High School Students ◽

Junior High School ◽

Junior High ◽

Junior High School Students ◽

Test Material ◽

School Students ◽

Level Of Abstraction ◽

Flat Side ◽

Mathematical Abstraction

This study aims to examine the misconceptions that often occur in junior high school students on the concept of geometry based on abstraction level. The research method is qualitative with a case study design. Subjects in this study are 27 students of the 3rd grade of junior high school students, who had to learn all the concepts that will be appeared on the test. Material that will be given on the test of this research is the concept of Triangle, Quadrilateral, Flat Side Geometry and Curved Side Geometry. This research takes a place at one of the junior high schools in Cimahi. The instrument in this study is a diagnostic test (to find out the types of students’ misconception), mathematical abstraction tests (to determine the level of abstraction) and interview rubrics. Misconceptions produced by students are closely related to students’ mathematical abstractions, the higher the level of abstraction ability, the more students away from misconceptions. The topic taken in this study is the topic of basic geometry, the results can be a source of information about the types of misconception that often occur in students, and how the solution so that these misconception do not re-occur.

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