Producing classroom materials might include the student guide or reading materials, handouts, activities, exams, reports, and presentations. Of course, you might say that each of these can be done on the web and you would be correct. However, the skill levels and resouces required to create these materials are more easily obtained than those required to put the same materials on the web.
For example, now-a-days, knowledge and skills used to operate office applications such a Word and PowerPoint are very common. It is almost understood that anyone with basic computer skills can type a document. This is not always the case with delivery options on the web or via video.