On March 16, 2020, many universities in Indonesia began implementing online-based learning to replace lectures in the classroom. This is done as a way to reduce the transmission of the Covid-19 outbreak in Indonesia. There is an opinion that with the implementation of online learning, especially in mathematics education study programs, there are many obstacles when learning takes place. This study aims to determine the obstacles that arise after the implementation of online learning in mathematics learning in Higher Education. This research is a qualitative case study, assisted by an online survey. The researcher collected data through an online survey consisting of 27 questions. The survey is aimed at lecturers who teach in Mathematics Education study programs in Indonesia. The survey contains structured questions and leads to three parts, namely; basic skills challenges, teaching and learning challenges, and university challenges. The 27 questions contained questions about the ability of platform mastery to support online learning owned by each lecturer. The research involved 26 lecturers from universities in Sumatra, Java, Kalimantan, and Sulawesi. The results of this study reveal that all lecturers affected by the pandemic use a Learning Management System (LMS) based website as a means of online learning. The learning management system-based platform is the most widely used (google class and Edmodo) while video conferencing is the second choice (Zoom and Skype). What is interesting is that the LMS available on campus is less attractive to lecturers. However, there are obstacles faced such as the limitations of writing mathematical symbols and the limited basic capabilities of the learning management system and multimedia software to support online learning.

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Dampak pandemi Covid-19 pada sektor pendidikan salah satunya adalah mengubah sistem pembelajaran tatap muka menjadi pembelajaran daring. Penelitian ini diadakan untuk mengetahui bagaimana pola pendampingan orang tua dalam pembelajaran daring pada tingkatan Sekolah Dasar (SD). Data penelitian diperoleh dengan menggunakan kuesioner yang diberikan secara online melalui Google Form kepada 100 orang tua siswa SD yang dipilih dengan metode random sampling. Berdasarkan hasil penelitian, diperoleh kesimpulan bahwa orang tua berperan dalam mendampingi proses belajar anak di rumah. Sebagian besar orang tua tidak dapat mendampingi anak dalam belajar sepenuhnya karena kedua orang tua harus bekerja, sebagai solusinya yang mendampingi anak belajar adalah anggota keluarga lainnya. Tidak sedikit pula orang tua yang mempercayakan guru les untuk mendampingi anak belajar karena orang tua tidak memahami materi yang diberikan. Besar harapan orang tua agar guru dalam memberi penjelasan materi tidak terlalu cepat sehingga siswa lebih dapat memahami materi dengan baik, komunikasi antar siswa dan guru lebih intens, materi terintegrasi dengan kehidupan siswa, dan siswa memperoleh keterampilan serta pendidikan karakter.

Penelitian ini bertujuan untuk mengeksplorasi unsur etnomatematika Museum Kereta Kraton Yogyakarta dan mengintegrasikannya ke dalam pembelajaran matematika. Jenis penelitian ini yaitu penelitian eksploratif. Data yang diperoleh berupa data kualitatif, sumber data penelitian diperoleh melalui observasi, wawancara, dokumentasi, dan studi literatur yang berkaitan dengan Museum Kereta Kraton Yogyakarta. Teknik pengumpulan data dilakukan dengan observasi, wawancara dan dokumentasi. Analisis data dalam penelitian ini menggunakan metode kualitatif-verifikatif, yaitu suatu metode induktif dalam penarikan kesimpulan dimana data dijadikan sebagai dasar untuk menyimpulkan gambaran umum keadaan objek kajian. Hasil penelitian menunjukkan bahwa unsur etnomatematika Museum Kereta Kraton Yogyakarta dapat diintegrasikan ke dalam pembelajaran matematika, diantaranya konsep luas bangun datar, volume bangun ruang, kesimetrisan, dan teselasi/pengubinan. Konsep-konsep tersebut dapat diterapkan dalam pembelajaran matematika sebagai masalah kontesktual sekaligus sebagai salah satu cara mengenalkan unsur budaya kepada siswa sebagai upaya mengembangkan pendidikan karakter siswa.This study aims to identify the potential for integrating ethnomathematics at the Yogyakarta, particularly the Museum of Kereta Kraton (Kraton Railway Museum) into mathematics learning. This type of research was a qualitative descriptive study. The data obtained in the form of qualitative data, the source of research data obtained through observation, interviews, documentation, and study of literature related to Yogyakarta Kraton Railway Museum. The data collection technique was done by observing, interviewing and documenting. The data analysis in this study used a qualitative-verification method, which is an inductive method of drawing conclusions where the data is used as a basis for concluding a general description of the state of the object of study. The results showed that the ethnomatematics of Yogyakarta Kraton Railway Museum has the potential to be integrated into mathematics learning. Ethnomatematics that can be integrated include the concept of flat area, volume of space, symmetry, and  tessellation /tiling. These concepts can be applied in mathematics learning as a contextual geometry problem as well as a way of introducing cultural elements to students.

Students of mathematics education need to have a good understanding in solving integral calculus problems, but often have difficulty in understanding the subject material. The difficulties can be seen from the mistakes made by students when solving the problems. This article aims to analyze the errors of students in learning integral calculus especially in the subject of volume of the solid of revolution in terms of critical thinking aspects. This research is a qualitative descriptive study involving twenty-four of 6th-semester students of mathematics education at a private university in Yogyakarta. The research subjects were chosen purposively by considering: student errors in determining the volume of the solid of revolutions with integral techniques in terms of critical thinking aspect. The findings of this study indicate, student errors in determining the function of integrals, write down the rules of integral writing, misunderstanding in algebraic concepts, adding constants, write down limits and sigma notations, determine integration methods, determine boundaries integration, writing in integral sign, and error in determining the radius of the solid of revolution.