Blended learning supported by the knowledge indexed video case base in the course about history of science and technology

摘要

The paper constructs a knowledge indexed video case base. A total of four functions are being incorporated in the casebase including case study, collaboration, case reflection and case management. Large-scale class and blended learning are attempted in classroom in this paper, and the video casebase is employed for pre-class preparation, video-watching, case discussion and reflection. After class, students who attended the class are investigated and interviewed. Three opinions are proposed in this paper: Knowledge points shall be used as the indexes for the casebase as many as possible for precise support for pre-class preparation; case discussion shall be carried out in groups since group discussion is helpful for profound discussion of the connotations contained in different cases and facilitating of deeper reflections; the reflection process shall provide better supporting tools to collect the achievements of collaborative learning. All of these opinions may support the author for further exploration.