Online learning also gives teachers and students flexibility in teaching and absorbing lessons. During the online learning process, students and teachers can record the session that day, allowing teachers to review their lessons. Teachers then draw from experience for future lessons or record students' contributions and feedback in the learning process for student assessment. For students, it allows them to review the lecture at any time and at the same time record their questions about the lesson. With online learning, both students and teachers can access and search for extensive learning materials that are not limited to the course textbooks of that subject. Therefore, the evidence related to the lesson is also richer, the students' ability to think and relate problems is also more flexible.