This paper presents aspects of both oral and written communication disfluencies based on speech transcripts and chat conversations. The found results come from manual analyses of both audio transcriptions of students' verbalizations and XML codification of Computer Supported Collaborative Learning chat sessions. The aspects presented during the analyses are continuity, discontinuity, fluency and disfluency, these being selected with the purpose of being correlated. The entire analysis was based on emphasizing disfluency key words and concepts from dedicated taxonomies.