Research on Online Course Design Strategy Based on Text Analysis of Bullet Screen

Based on the instructional design model ADDIE and the principle of goal-oriented course design, this study uses tools such as Python and GooSeeKer to analyze the high-frequency words, quantity changes and proportions, semantic relationships, and emotional changes in the bullet screen text of the online open course “Grade 9 Mathematics” on Bilibili, using a combined quantitative and qualitative analysis method. It was found that learners can engage in creative thinking regarding course content, exhibit high levels of semantic association during interactions, and provide positive feedback on the course overall. However, there are also issues such as a lack of effective supervision leading to deviation from preset goals and fluctuating levels of learning engagement. Based on the analysis results, a model for online course design is proposed, with recommendations for online course development from four dimensions: course goals, course design principles, technical means, and learning feedback. This study attempts to answer questions such as “how to design effective and learner-satisfactory online courses.”