"Medium End" such as WebCT, Campus product from Blackboard LLC, or Cornell Virtual Workshop where one provides knowledge at different levels of detail, glossaries, quizzes and dynamic instructional nuggets.
"Traditional High End" such as the classic Multimedia CDROM ( or its web equivalent) prepared by sophisticated authoring tools such as Macromedia Director and with possibly professionally produced videos.
These will move towards Web Standards using Web Video, Java plus Dynamic HTML and W3C based XML and DOM specification
Note clear to me if authoring of educational material will differ from that of "ordinary documents"