There are more and more students who do not understand what they do not understand in learning. Since the effectiveness of prior learning with videos has been reported in recent years, such practice was implemented with students in linear algebra lectures. Specifically, before lectures on difficult topics, students watched a video and tried to solve some practice problems. Having compared exam scores for students with and without the use of prior learning videos, the results appear to show that it is very effective. In addition, the questionnaire showed the factors about where students are interested in prior learning videos.
