Networked multimedia is described as a tool for collaborative learning, focusing on learning through discussion. It is proposed that multimedia may be used to structure and enhance communication, thereby promoting learning. The background and application of collaborative learning is outlined. Several dimensions of media which influence the evolution of its use are examined. Two examples of multimedia discussion tools are used as illustration: The Multimedia Forum Kiosk (MFK) and SpeakEasy, a discussion tool for World Wide Web (WWW). MFK is an interface for discussion that makes use of multimedia for socially relevant representations. MFK has two intended effects: to allow the user to internalize and learn from the community knowledge base, and to augment the knowledge base by synthesizing new ideas. SpeakEasy, currently an experimental discussion tool for WWW, builds upon the ideas of MFK. Because it is accessible via network, it is a different-times, different-places type of communication medium. As participants make assertions, questions, and responses to one another about various issues, a structured, graphical representation emerges making conceptualization of the discussion possible. Five figures illustrate the applications. (Contains 32 references.) (MAS)