When choosing media for a distance education course, several questions should be considered:

• Which media are likely to appeal to the learners?
• Do the learning objectives suggest particular media?
• Is the technology needed to carry these media available?
• How should each of the preferred media be used, and how much should each be used (for example, for what share of the student's time)?
• What would it cost designers, instructors, and learners-in money, time, and flexibility-to use these media?
• Would less expensive media be sufficiently effective?
• Do the chosen media offer variety of stimulus and activity?
• How can the media be combined for maximum effect?

• J. Koumi, Comparative Merits and Distinctive Teaching Functions of Different Media
  
• Adrian Kirkwood, Selection and Use of Media for Open and Distance Learning

• Design Issues for Instructional Multimedia
  
• When should your organization use technology based training
  
• Distance Education: An Overview