This synthesis report provides an extensive overview of literature evaluating use and effectiveness of distance learning technologies in delivering continuing education (CE) for health professionals. Chapter 2 discusses advantages and disadvantages of correspondence materials, explores suggestions for improving print-based learning materials, and identifies resources for information regarding effective design of print-based CE programs. Chapter 3, on audio-mediated technologies, focuses on these three: audio teleconferencing, radio, and audiocassettes. Each is reviewed, advantages and disadvantages are explored, and examples of its application in delivery of CE are provided. Chapter 4 examines video-mediated technologies, their advantages and disadvantages and their use in CE. They include videoconferencing, broadcast and closed-circuit television networks, slow scan video, and video-based satellite broadcasting. Chapter 5 describes computer-mediated learning (CML) technologies: CD-ROM, interactive videodisc systems, and Internet and World Wide Web. Many advantages are addressed: storage capacity, rapid access to information, place and time independence, interactive learning, individualized instruction, self-paced learning, learner control, just-in-time learning, cost savings. Disadvantages are considered: costs, technical limitations, security, and access. CML planning and managing are then discussed. (Appendixes include a summary of experimental research reviewed, abstracts and study summaries, and 491 references.) (YLB)