Patent attributes
A learning system capable of adaptively presenting various learning materials of various concepts to a user may include a concept tracker to analyze the learning materials and track one or more concepts from each of content items in the learning materials. A content item may be a video, and the system may analyze the transcripts of the video to determine one or more concepts about the video. The learning system may recommend a concept for the user to learn or improve based on the user's understanding and knowledge level around relevant concepts. Further, the system may present learning materials about the recommended concept to the user by indexing video segments by the time stamps associated with the particular concept and replay the video segments from the respective starting position and the ending position without replaying the entire video contents. Various clustering methods may be used to track the concepts.
