Online learning has been studied for a long time. It
has many benefits and challenges. In the period of COVID-19
spreading, many universities and schools have more concerns for
their students of the virus infection. Thus, the online classroom
has been set to be a teaching method for students. However, it is
quite a new normal practice, especially in Thailand, to have an
online instead of a face-to-face classroom. Therefore, this study
is a path for preparing to conduct online learning. This study
aims to provide guidelines to design effective online learning
based on students' opinions. By analyzing the open-end
questionnaires with 37 participants, the results reveal that
blended learning is the most preferred learning pedagogical
approach. Moreover, the metaphor factors, including subjects'
characteristic, class period, class size, activities and assessment
that were suitable for online learning according to the students'
opinion, were suggested. Finally, some obstacles that students
have faced in online learning were presented, and some solutions
were proposed.