Learning Support System using Question Generation to Encourage Critical Thinking in Online Lectures

e-Learning has become a common practice in ed-ucational institutions, giving students more opportunities for remote learning. Learners generally need to spend some time formulating and thinking about their questions related to the learning material. Therefore, in this study, we concentrate on video lectures that individuals can access at their own convenience. We focus on critical thinking, which is defined as the process of critically examining the foundations of an idea or belief. We aim to provide learners with video lectures that aid in the growth and improvement of their critical thinking abilities. In order to do this, we propose an approach for helping and supporting questions generation as well as an approach for presenting relevant slides in the question support task. The findings of a questionnaire are used to evaluate the effectiveness of our proposed approaches. We completed evaluations three times utilizing lecture slides from various academic areas to verify the effectiveness of our proposed slide rankings. The findings show that based on the lecture's subject, different lecture slides are recommended for each question. On the other hand, our proposed approach tended to be highly evaluated for questions containing multiple keywords. Furthermore, the results indicate that the proposed slide rankings are more useful in difficult-to-understand slides.