KEMAMPUAN KONEKSI MATEMATIS SISWA DIKAJI DARI KEMAMPUAN PENALARAN ADAPTIF DALAM MATERI KUBUS DAN BALOK

AbstractThe purpose of this study was to describe the mathematical connection ability of students studied from their adaptive reasoning ability in solving cube and block material problems in junior high school. This research was arranged in the form of a case study with the research subjects are 20 students of class IXc SMP Negeri 1 Tebas who have studied cube and block material, while the object in this research were the mathematical connection ability and adaptive reasoning abilities. Data collection in this research was carried out through tests of adaptive reasoning abilities and tests of mathematical connection abilities as well as interviews as a follow-up activity after being given the test. Based on the data analysis conducted, the results showed that students 'mathematical connection abilities tended to be in line with students' adaptive reasoning abilities. Students with high category adaptive reasoning ability tend to have high category mathematical connection ability, which is 75% of them. Students with moderate category addictive reasoning ability tend to have mathematical connection ability which is classified as moderate category, which is 76.92% of them. Meanwhile, students with low category of adaptive reasoning tend to have low mathematical connection ability, which is 67% of them.Keywords: Adaptive Reasoning, Cube and Block, Mathematical Connectio

PENGEMBANGAN DESAIN TUGAS PENALARAN MATEMATIS MELALUI COUNTER EXAMPLE UNTUK MENUMBUHKAN KEMAMPUAN BERPIKIR KRITIS SISWA

AbstractThis research is background by the lack of integration between mathematical reasoningand students' critical thinking skills in mathematics. The facts obtained from interviewsshowed that the assignments were given to students still use the questions contained inthe books, so that students have not fully used their reasoning to think critically. A goodassignment should be a task designed with attention to student response patterns so thatepistemological obstacles that often arise can be overcome. This study aims to develop amathematical reasoning assignment design by providing a counter example (CE), withCE students can explore related assignments so that they can foster students' criticalthinking skills. This research was didactical design research which involved six studentsusing written tests and interviews. The results of the study revealed that the assignmentdesign with CE could reveal the presence of learning obstacle that hindered students'critical thinking skills and able to overcome the learning obstacle. The conclusion is thatstudents' critical thinking skills have developed after being given a mathematicalreasoning design through the provision of CE, this is shown by the post-test average score(62.56) which is higher than the pre-test average (15.03).Keywords: Task Design, Counter Example, Critical Thinking Skills, MathematicalReasonin

Studi Batang Bawah Dan Pengaturan Lingkungannya Pada Pembibitan Jarak Pagar (Jatropha Curcas L.) Dengan Cara Grafting

The experiment has been conducted in Labuhan Dalam, Tanjung Seneng, Bandar Lampung from January to June 2008. This experiment consisted of 3 subtitles that are: (1)The effect of root stock age and shading degrees on physic nut plant propagation with grafting. Is a factorial experiment (3x4) with split plot design, shading degrees as main plot consisted without shading, light shading), moderate shading, and heavy shading .Root stock age as subplot consisted 6, 8, and 10 weeks after transplanting; (2) The effect of root stock high and scion length on physic nut plant propagation with grafting. Is a factorial experiment (3x3) with randomized completely block design, the first factors were root stock high consisted 10, 15, and 20 cm from nursery medium. The second factors were scion length consisted 5 cm, 7,5 cm, and 10 cm; (3) The effect of kind of bend and IBA concentration on physic nut plant propagation with grafting. Is a factorial experiment (3x3) with randomized completely block design, the first factors were kind of bend consisted raffia rope, plastic rope, and faucet cellophane tape rope. The second factors were IBA concentration consisted 0, 1000, and 3000 ppm. The treatments were consisted 3 replication and each experiment unit consisted 10 seedlings. The result shows that (1) root stock age 8 and 10 weeks produces physic nut seedling growth better than root stock age 6 week. Physic nut seedling without shading and light shading (1 layer paranet) grow better than with moderate shading (2 layers paranet) and heavy shading (3 layers paranet); (2) Root stock high 15 cm produce physic nut seedling growth better than root stock high 10 cm and 20 cm. Length of scion 7,5 cm and 10 cm produces physic nut seedling growth better than length of scion 5 cm; (3) Plastic and faucet cellophane tape rope produce physic nut seedling growth better than raffia rope. IBA concentration 1000 and 2000 ppm produces physic nut seedling growth better than o pp

DEICTIC GESTURE DALAM PENDEKATAN SAINTIFIK PADA PEMBELAJARAN MATEMATIKA UNTUK MENOPANG MINAT DAN BERPIKIR KREATIF SISWA SMP

AbstractThe research objective was to reveal the dectic gesture in the scientific approach to learning mathematics towards students' creative thinking and interest at the Cahaya Kemuliaan High School for the academic year 2019/2020. The form of research is Pedagogical Action Research (PTP). The research procedure consists of three stages, namely: preparation, implementation, and final. The results of the content and empirical validity obtained that the questionnaire instruments, pretest questions, and post-test questions were feasible to be used to conduct research. After conducting the research, it was concluded that deictic gesture in the scientific approach had an influence on interest, namely on indicators of feelings of pleasure, interest and attention. Meanwhile, creative thinking is the indicator of fluency and flexibility. .Keywords: Deictic Gesture, the scientific approach, learning mathematics, Creative thinking, interes

Students' Mathematical Communication Ability and Disposition in The Implementation of Micro Didactic Design at Junior High School

The reasons for conducting this research are that some teachers have taken inappropriate learning strategies and that students’ mathematical disposition and mathematical communication ability in learning are still low. The Didactical Design Research (DDR) method begins with preliminary study on 28 eighth graders (junior high schoolers), aiming at exploring the students’ learning obstacles to develop a micro didactic design. This micro didactic design is then implemented to the same students, after being subjected to validation process. The research results indicate that the learning using micro didactic design can minimize students’ learning obstacles and this, eventually, positively contributes to students’ mathematical communication ability and disposition in materi algebraic factorization. From the data analysis results, it is found that the price of effect size for micro didactic design learning on mathematical communication ability is 1.07, and from Table Z it is found that its contribution is 35.77%. Meanwhile, the price of effect size for micro didactic design learning on mathematical disposition is 0.2, and from Table Z it is found that its contribution is 7.93%

POTENSI LINTASAN BELAJAR ANTAR STRUKTUR KOGNITIF SISWA MELALUI PEMBERIAN TOPANGAN DALAM SUDUT ISTIMEWA TRIGONOMETRI

This research is motivated by the limited support given to students in understanding the concept of trigonometry. This study aims to describe the potential of student learning trajectories at certain trigonometry angles. Qualitative research methods were used by archiving research objectives and with tests followed by interviews with six students of class XI IPA at SMA Negeri 3 Sanggau. After analyzing the data, it was revealed that the test results could not describe the potential of student learning trajectories. However, after following up with supporting interviews, it was revealed the potential trajectory of their learning about certain points of view. The achievement of exploring potential learning trajectories between students' cognitive structures through providing support in trigonometry special angle material can be seen in the following indicators. As much as 90% of the number of subjects, know the elements in trigonometry comparisons. 85% of the subjects were able to conclude and find trigonometry comparisons of special angles with the unit circle. 85% of the subjects were able to accurately find the values of the ratio of special angles using the unit circle, but were still constrained because the method used was new and had never been taught by subject teachers at school. As much as 90% of the number of subjects were enthusiastic in learning and actively participating during research because the material provided by researchers provided new experiences for students. This was found by researchers during the second interview. Suggestions that can be conveyed based on the results of this study, are that teachers and prospective teachers should be more creative in choosing learning models in applying learning trajectories to build potential student learning trajectories in an effort to increase cognitive knowledge in conceptual understanding of mathematics

Kemampuan Komunikasi Matematis Siswa Dikaji dari Gaya Kognitifnya di Sekolah Menengah Kejuruan

This study aims to explain the Mathematical Communication Capabilities Matter Systems of Linear Equations In Two Variables studied from the Cognitive Style Class X Accounting I School SMK Negeri 1 Pontianak in the academic year 2015/2016. The method used is descriptive. Subject of research is 31 students of class X Accounting I SMK Negeri 1 Pontianak. The research subject is determined through purposive sampling technique. Data collection tool used is a test, questionnaire and interview guides. The results of data analysis showed that 50% of students of visual cognitive style groups have mathematical communication skills good enough to very well. As for the group of verbal cognitive styles, there are 38.46% of students who received a good mathematical communication skills category

PEMAHAMAN KONSEPTUAL DIKAJI DARI GAYA BELAJAR SISWA DALAM MATERI BANGUN DATAR KELAS VIII SMP

Abstract This research aims to describe how conceptual understanding is assessed from students' learning styles in class VIII flat building materials at SMPN 20 Pontianak. The research method is descriptive with a survey. The research subjects were nine students of class VIIIA consisting of three students with a visual learning style, three students with an auditory learning style, and three students with a kinesthetic learning style. These results indicate that students who have a visual learning style tend to have moderate conceptual understanding, only research that restates the concepts that have been studied classifies objects based on mathematical concepts and presents concepts in various representations achieved, for students who have auditory learning tend to have an understanding. Low conceptual is only an indicator that is known to be a concept that has been studied, classifies objects based on mathematical concepts, and presents the concept in various fulfilled representations, whereas Students who have a kinesthetic learning style tend to have high conceptual understanding, only indicators of restatement of concepts that have been studied, classifying objects based on mathematical concepts, presenting concepts in various representations and relating internal or externally fulfilled mathematical concepts. Keywords: Conceptual Understanding, Learning style, Two-dimensional Figur

POTENSI BERPIKIR KREATIF SISWA DALAM MATERI BILANGAN DIKAJI DARI SELF CONFIDENCE DI SMP

AbstractThis study aimed to exploit the creative potential of students in numeric assignments assessed from the self-confidence a students. This type of research was descriptive research. The subjects in this study involved 9 junior high school students. The object of this research was the potential for creative thinking of students in material assignments that are reviewed from self-confidence. The data aids used were  creativity tests, questionnaires, and interviews. An analytic framework to expose the potential for creative thinking using “The Torrance Tests of Creative Thinking (TTCT)”. While the data analysis technique used qualitative data analysis by Miles and Huberman method. The test results obtained are from 9 students, there were 4 students who are in high self-confidence who have the ability to think mathematically creative "very good", "good" and "sufficient", 4 students were in self-confidence who have the ability to think mathematically creative "very good "," Good "and" enough ", and the remaining 1 student was in low self-confidence who has" less "mathematical creative thinking skills. Keywords: Creative Thinking, Number, Self Confidenc