Penelitian ini bertujuan menghasilkan media pembelajaran berbasis teknologi Augmented Reality pada materi limas dan mengetahui kelayakan pengunaannya. Penelitian ini berdasarkan hasil observasi di sekolah peserta didik masih kesulitan dalam menentukan bentuk, luas dan volume limas. Untuk mengatasi hal tersebut, perlu dikembangkan sebuah media pembelajaran yang mampu membuat peserta didik merasakan secara real dalam proses belajarnya.  Metode yang digunakan yaitu metode Research & Development (R&D) dengan model Assessment/Analysis, Design, Development, Implementation & Evaluation (ADDIE). Teknik pengumpulan data menggunakan lembar angket. Instrumen yang digunakan angket penilaian kualitas media pembelajaran. Sumber data penelitian ini peserta didik kelas VIII SMP Negeri 1 Cikoneng yang berjumlah 15 orang. Hasil penelitian ini berupa media pembelajaran berbasis Tekonologi Augmented Reality pada materi limas bernama GEO3DAR. Kelayakan kualitas isi dan tujuan berada pada kategori layak. Kelayakan kualitas intruksional berada pada kategori sangat layak.This study aims to produce learning media based on Augmented Reality technology on pyramid material and determine the feasibility of its use. This research is based on observations in schools, students still have difficulty in determining the shape, area, and volume of the pyramid. To overcome this, it is necessary to develop a learning media that can make students feel real in the learning process. The method used is the Research & Development (R&D) method with the Assessment/Analysis, Design, Development, Implementation & Evaluation (ADDIE) model. The data collection technique used a questionnaire sheet. The instrument used is a questionnaire to assess the quality of learning media. The data sources for this research were 15 students of class VIII SMP Negeri 1 Cikoneng. The results of this study are learning media based on Augmented Reality Technology on pyramid material called GEO3DAR. The feasibility of the quality of the content and objectives are in the appropriate category. The feasibility of the instructional quality is in the very decent category.

This study aimed to determine the increasement of mathematical creative thinking abilities of secondary school student after learning through cooperative learning Student Teams Achievement Divisions (STAD). This study used quasi-experimental design with a control group not equivalent. The study involved an experimental class given STAD cooperative learning assisted Geometer's Sketchpad (GSP) and the control class was only given expository learning. Instruments used a set of mathematical creative thingking tests and questionnaires attitudes. The results showed that the student's mathematical creative thinking ability can be improved through STAD cooperative learning STAD assisted Geometer's Sketchpad.

This study aims to determine the ability of mathematical communication and mathematical problem-solving ability to learners after using the learning model Logan Avenue Problem Solving (LAPS) -Heuristic and correlation between mathematical communication ability with mathematical problem solving ability to learners using model of learning LAPS-Heuristic. The population of the study were students of class VII of SMP Negeri 8 Tasikmalaya. Samples were taken one class at random and the selected ones were class VII I. Data collection techniques used were the provision of mathematical communication ability test and mathematical problem solving ability. Statistical analysis used is hypothesis test. The results of the analysis show the mathematical communication ability of the learners through the learning model LAPS–Heuristic baik and mathematical problem solving ability of learners through LAPS-Heuristic less good model. There is a correlation between mathematical communication ability with problem solving ability of mathematic learners using learning model LAPS-Heuristic.Keywords: Mathematical Communication, Mathematical Problem Solving, Logan Learning Model Avenue Problem Solving (LAPS) -Heuristic.

Problem-solving and cognitive style are two things that are important to note, but the reality is rarely considered especially cognitive style. Student cognitive style can influence problem-solving abilities. This study aims to investigate student errors based on Newman in problem solving, in terms of independent and dependent field cognitive style. The study was conducted on junior high school students in Indonesia, the method used is exploratory involving 2 Subject. Subjects are taken from independent and dependent field style cognitive groups. Stages of problem-solving according to Polya’s includes: understanding the problem, devising a plan, carrying out the plan, and look back. Errors according to Newman include errors in reading, comprehension, transformation, process skills and encoding. Data were collected using the Group Embedded Figure Test (GEFT) and problem-solving test. The conclusion shows that subject with field dependent cognitive style with the initials SFD tend to make errors at the transformation stage in making models, process skills in manipulating algebra and calculation processes, and conclusions for making errors in the previous stage. Whereas subject with independent field cognitive style with the initials SFI tend to make errors at the process skill stage in manipulating algebra and calculation processes.

Certification of teachers that has lasted more than a decade aimed to produce professional teachers, thus impacting significantly to the advancement of education in Indonesia. But the reality in Tasikmalaya, West Java, it is very much different from the expectations. The majority of teachers are even more concerned in the increasement of social status than the professional quality as an educator. More recently the government has implemented Teacher Competency Test (UKG), which was held simultaneously throughout Indonesia with the aim to determine the ability of teachers' pedagogical and professional competences. The purpose of this study was to determine the mapping of the teachers' competency by rank, domain competence, academic qualification, age, gender, and see the difference in results UKG based certification status. Outputs resulting from this study were (1) to map the results UKG mathematics of junior high school in Tasikmalaya, (2) to formulate recommendations or proposals regarding the improvement of the UKG (3) to formulate recommendations or proposals of sustainable planning of professional development for teachers. The method used in this research were study documentation, interviews and questionnaires open. The mapping of UKG results can be used as consideration in evaluating the program especially in what improvements need to be prioritized. By using the techniques of interviews and open questionnaire, was expected collect information of the effect of UKG for the teachers.