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.

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.

A learning process in schools realizes the purpose of this education. Mathematical multi representation ability is one of the general goals of teaching mathematics in schools. This research is quasi-experimental. The amount of increase before and after learning is calculated by the normalized gain formula. There is a difference in the increase in mathematical multi-representation abilities of students who receive MFPI learning than conventional learning based on high KAM and medium early mathematical ability. By contrast, at low early mathematical ability, there is no difference in increasing multi representation abilities. Most students use mathematical representations. The percentage of students using more than two representations is 40%. MFPI learning affects students with high and medium KAM but does not affect students with low early mathematical ability. Because at the MFPI learning stage, low early mathematical ability students lack initial knowledge that can be used to form new knowledge.

Geometry Ability is one of the mathematical abilities that must be mastered by students, this is because geometry ability is one part of learning mathematics. However, the reality in the field in junior high school students, students have difficulty in learning transformation geometry, namely in the material of reflection, rotation, translation and dilatation. This difficulty of students is caused by students not understanding the coordinate points on the cartesian plane. The difficulty of students in determining cartesian coordinates has the effect that students cannot determine straight-line drawings based on straight-line equations. Another thing that causes students difficulty in understanding the geometry of transformation is that students' ability to think abstractly is still very low, students cannot describe concepts from mirroring, turnover, shifting and dilatation. The purpose of this study is to understand the geometry of trasnsformas through the exploration of Jambi batik. The research method used is descriptive qualitative, the result of the research obtained is that there is a concept of transformation geometry in Batik Motik Jambi so that it can be applied in mathematics learning