The research aims to find out students ' Metacognition ability in the process of problem solving. The ability of Metacognition is students ' ability in controlling cognitive ability. A person's success in learning is capable of managing their own cognitive abilities. Metacognition ability stressed to do your planning activities, monitor and evaluate against a resolution. The success of students in the process of problem solving is an important in learning mathematics. This research will describe how the student performs the process of Metacognition in mathematical problem solving process. This type of research is a qualitative descriptive study. The data in this study were obtained from a test sheet troubleshooting as well as guidelines for the interview. Data obtained from a test problem solving sheet is basis in conducting interviews with the subject to know the metacognition. The test will be given to 3 people a subject that consists of low-ability students, medium and high. Result of the study that the subject with high ability of Metacognition process was properly since the subject already has the required concepts. To the subject with the appropriate capabilities are low and less successful in the process of Metacognition, this is due to not having a concept that will be used.

This study aims to describe students' mathematical problem-solving abilities based on mathematical dispositions at Riyadlul Mukhlishien Middle School. This type of research used in this research is descriptive qualitative. The research subjects used were 21 students of class VIII A. The data sources of this research are in the form of questionnaires, test descriptions and interviews. The results of the questionnaire were used to classify the level of students' mathematical dispositions. After that, two students from each category of mathematical disposition were selected to be the subject of tests and interviews. The results of tests and interviews of mathematical problem-solving abilities were analyzed based on the mathematical disposition of the students. The results of this study indicate that the mathematical disposition of SMP Riyadlul Mukhlishien students is divided into three categories, high, medium and low. Students who have mathematical problem-solving abilities in the high mathematical disposition category are able to meet the indicators of mathematical problem-solving abilities well and write them down completely. Students who have mathematical problem-solving abilities in the moderate mathematical disposition category are able to meet the indicators of mathematical problem-solving abilities but do not write them down completely. Students who have mathematical problem-solving abilities in the low mathematical disposition category are less able to meet the indicators of mathematical problem-solving abilities because they do not write them down completely and still experience errors in calculations

Abstract:The ability of critical thinking is part of Higher Order Thinking Skills (HOTS). To develop the ability of critical thinking is crucial to support the development of high-level thinking skills. The study aims to see the use of critical thinking-based teaching materials to optimize early semester student critical thinking skills in trigonometric courses. This research is a qualitative descriptive study, the subject of research is a student of early semester on trigonometric courses. The research subject amounted to 25 people.  The results of the study that the use of the teaching materials critical thinking can increase the ability of the Higher Order Thinking student early semester that follows trigonometric courses. Abstrak:Kemampuan berpikir kritis merupakan bagian dari Higher Order Thinking Skills (HOTS). Pengembangan kemampuan berpikir kritis sangat penting untuk mendukung kesuksesan mahasiswa dalam melakukan HOTS. Penelitian ini bertujuan untuk melihat penggunaan bahan ajar berbasis berpikir kritis untuk mengoptimalkan HOTS  mahasiswa semester awal pada mata kuliah trigonometri. Penelitian ini merupakan penelitian tindakan dengan subjek penelitian adalah mahasiswa semester awal pada mata kuliah trigonometri. Subjek penelitian berjumlah 25 orang.  Hasil penelitian menunjukkan penggunaan bahan ajar berpikir kritis dapat mengoptimalkan kemampuan Higher Order Thinking Skill (HOTS) mahasiswa semester awal yang mengikuti mata kuliah trigonometri.

The objectives in this study are 1) Describe the implementation of the 2013 curriculum in mathematics learning, 2) Formulate what factors support and hinder the implementation of the 2013 curriculum. This study is a type of qualitative research using a descriptive approach. The study subjects were mathematics teachers who taught in class X of SMA Muhammadiyah 3 in Tangerang City. Data collection techniques used are in-depth interviews, observation, documentation. Technical data analysis is done by reducing, presenting data, and verification. The results showed that the X grade mathematics teacher in implementing the 2013 curriculum was still lacking. This can be seen by teachers not compiling RPPs based on the 2013 curriculum. As a result, the learning process is not in accordance with the demands according to 2013 curriculum references. Factors that prevent teachers from implementing the 2013 curriculum are teachers who have not attended 2013 curriculum training, teachers have not joined and are taking part in routine activities in the city high school MGMP routine Tangerang, schools have not facilitated 2013 curriculum training activities and the lack of existing infrastructure in the school environment to support the implementation of the 2013 curriculum