The purpose of this research is to find out the correlation between understanding the geometry concept of mathematics pre-service teacher and teaching ability, in explaining the concept of geometry systematically in a planned order, so that the students are easier to understand. Geometry concepts include (1) visual skills, (2) descriptive skills, (3) drawing skills, (4) logical skills, and (5) applied skills. The research method is an experiment, and the sampling technique is purposive. The research instrument is a practice test. Data understanding of geometry concept comes from the Final Test of Geometry course, while the data of teaching ability comes from teaching practice score on geometry topic. The statistical test uses the Pearson Product Moment correlation test and linearity test. The results of this research are: (1) there is a significant correlation between students’ concept comprehension ability and geometry teaching ability; (2) the relationship between students’ conceptual understanding and geometry teaching ability is in the medium category; (3) the magnitude of the influence between the understanding of student concepts and geometry teaching ability is 46.5%. It indicates that there is another factor of 53.5% that affects the ability of pre-service teacher teaching on geometry topics in addition to student concept comprehension.

This article aims to analyse how conceptual understanding and productive dispositions in trigonometry through generative learning, using a qualitative research design. Participants of this study were 20 students of the level 1 Mathematics Education Study Program of the University of Swadaya Gunung Jati, who took the Intermediate Selecta Capita course and received trigonometry material. The data analysed through 3 stages, namely data reduction, data display, and conclusion drawing. This study indicates that the student’s conceptual understanding can represent the information obtained from the problems given; it is just that when performing algebraic operations still encounter obstacles. Students’ constraints in performing algebraic operations on trigonometry can be due to a lack of understanding of the concepts in algebraic operation material. Confidence in studying and providing answers to student problems shows that students’ productive disposition is still not optimal.

Mathematical resilience is an internal factor in students that is important to have in dealing with learning mathematics. This study aims to design efforts to construct mathematical resilience and develop sainsmatikabased teaching materials in constructing students' mathematical resilience. The research method used is the design method (design research) with a qualitative approach. The design of this study uses the model proposed by Plomp and Nieveen (2007) which includes preliminary research, namely analyzing the level of students' mathematical resilience, conducting a literature review, and developing a conceptual or theoretical framework for research. Prototyping stage, the process of designing teaching materials that is developed repeatedly is the design of the Pythagorean module based on sainsmatika. The last is the assessment phase, by evaluating the extent to which the modules designed provide solutions in constructing students' mathematical resilience. The validation results show that the module category is at a very feasible level for use with a percentage of 89.84%, covering aspects of content feasibility assessment of 92.43%, presentation feasibility of 91.66%, language feasibility of 84.25%, and assessment of sainsmatika elements. by 91.68%. So that the module that has been designed is very feasible to use as a form of constructing students' mathematical resilience.

Abstrak. Penelitian ini mengungkapkan bahwa mahasiswa tingkat tiga program studi Pendidikan Matematika memiliki permasalahan pada saat persiapan pelaksanaan program PPL. Pada observasi awal masih banyak mahasiswa yang tidak memiliki kepercayaan diri ketika diberikan peluang untuk mengajar di tingkat Sekolah Menangah Atas. Meskipun berbagai upaya dilakukan seorang dosen guna meningkatkan kepercayaan diri mahasiswa pada perkuliahan pembelajaran mikro. Dengan demikian, penelitian ini memiliki rumusan masalah yakni menganalisa self confidence dan keterampilan bertanya mahasiswa pada perkuliahan pembelajaran mikro. Adapun metode penelitian ini menggunakan deskriptif kualitatif karena relevan dilihat dari proses awal penelitian hingga penarikan kesimpulan. Berdasarkan hasil penelitian diperoleh kesimpulan bahwa : 1) kemampuan mahasiswa dalam mengajukan pertanyaan tingkat dasar tergolong pada kategori sangat baik hal ini dibuktikan hampir keseluruhan mahasiswa mampu melakukan keterampilan ini, sedangkan kerampilan bertanya lanjut masih 70% mahasiswa melakukannya sisanya belum melakukan. 2) korelasi antara self confidence dengan keterampilan bertanya pada perkuliahan pembelajaran mikro terdapat hubungan yang kuat.Kata Kunci. Pembelajaran mikro, keterampilan bertanya, self confidence.

Tujuan dari penelitian ini adalah menelaah peningkatan kemampuan penalaran matematis mahasiswa yang memperoleh pembelajaran teknik MURDER pendekatan metakognitif dan mahasiswa yang memperoleh pembelajaran ekspositori pada materi garis dan lingkaran. Penelitian ini merupakan penelitian kuantitatif. Subjek penelitian adalah mahasiswa tingkat dua kelas A dan kelas B yang terdiri dari 35 mahasiswa. Metode pengumpulan data yang digunakan meliputi: (1) tes kemampuan penalaran matematis, (2) observasi, (4) dokumentasi. Data dianalisis menggunakan uji-t atau uji mann whitney. Hasil temuan penelitianin adalah: (1) Peningkatan kemampuan penalaran matematis mahasiswa yang memperoleh pembelajaran teknik MURDER pendekatan metakognitif lebih baik daripada peningkatan kemampuan penalaran matematis mahasiswa yang memperoleh pembelajaran ekspositori; (2) kualifikasi peningkatan penalaran matematis yang menggunakan pembelajaran teknik MURDER pendekatan metakognitif dan pembelajaran ekspositori masih dalam kategori sedang.