The first idea that must be understood by the students to learn the concept of concept of conservation of area is recomposing shape. In recomposing shape, the students will see the fact that the shape can be transformed into a different form without adding or losing the part of the shape. So the students could conclude that the area of the shape before and after recomposing remains the same. Therefore, this study will answer how the students understand the initial idea (recomposing shape) of the concept of conservation of area. The instructional activity which was made in this study is based on realistic mathematics education. The activity was created for third grade elementary school students in SD Al-Hikmah Surabaya. The third grade students were used since they have not learned about area measurement. So they could focus just on the shape without disturbance of the area formula. The result of this study suggest that students still need more similar activities to ensure their understanding toward the idea that recomposing shape will preserve the area of the shape.

Penulisan simbol matematika menggunakan komputer menjadi kebutuhan mutlak bagi siswa Sekolah Menengah ke atas karena pembelajaran online. Tetapi banyak siswa Sekolah Menengah Kejuruan (SMK) yang belum familiar untuk melakukan penulisan simbol matematika di komputer. Oleh karena itu, melalui pelatihan penulisan simbol matematika bagi siswa di SMK Techno Terapan Makasar menggunakan metode demonstrasi online dan tanya jawab ini diharapkan membantu siswa terampil dalam penggunaan teknologi supaya mempunyai kompetensi unggul di masa depan. Hasil pengabdian ini menunjukkan peningkatan dari siswa yang belum pernah menggunakan fitur equation editor menjadi tahu dan bisa mengaplikasikannya dalam menulis simbol matematika. Terlihat dari analisis kuesioner yang diberikan kepada siswa di awal pelatihan bahwa masih banyak siswa yang belum bisa menuliskan simbol matematika di komputer. Dalam proses pelatihannya ada beberapa siswa yang masih mengalami kesulitan. Kesulitan yang dialami siswa adalah menentukan simbol yang cocok dengan maksud dari rumus tetapi hal ini membuat siswa menjadi semakin tertarik dengan fitur tersebut.

Many methods and strategies of learning were being searched, made, and invented by a lecturer to provide an effective online learning process. Two years passed, and now Indonesia is on the road to endemic of covid-19 status, which soon caused the permission for offline learning. Indeed, students have their own expectations for this condition. Do they like it? Do they have difficulties so far? Do they want other methods? or other expectations of students which have not been explored yet? Therefore, this research will explore students' expectations of welcoming offline learning using a qualitative research method. The questionnaire was used as the instrument to collect the data from the students in the first year of the pandemic. The instrument mostly asked about the students' opinion of their online learning, then related to their expectations when it became offline learning soon. It was simply analyzed using excel to show the percentage of each data. The result showed that 75% did not like online learning since it impacts their score, which decreased from an average of about 70 to 50. Therefore, many students expect to understand the material with offline learning (80%) better than online. The reason for being less understandable with online learning and the decreasing score of students, becomes the evaluation of online learning found in this research. That strongly becomes the reason why the students expect to have a better understanding of offline learning in 2022